Archive 01/28/2022

The United States blocked it!China’s acquisition of the world’s second largest OLED driver chip company blocked

The U.S. Treasury Department stated that a Chinese private equity firm’s acquisition of system chip manufacturer Magnachip semiconductor constitutes a “national security risk.” Reuters commented that this is another obstacle for Chinese companies trying to invest in key overseas technology industries.

In March of this year, Chinese private equity firm Wise Road Capital agreed to acquire South Korean chip maker Magna Semiconductor for US$1.4 billion.

The transaction was originally expected to be completed in the second half of this year, but has since been subject to review by US and South Korean regulators.

At the end of May, Magna Semiconductor pointed out in an announcement that they had received an email from the Chairman of the Committee on Foreign Investment in the United States (CFIUS) requesting that both parties to the transaction submit a statement on the merger to accept formal review by CFIUS.

Although Magna Semiconductor stated in the announcement that the transaction itself does not require US approval, because all of the company’s manufacturing and R&D activities are carried out in South Korea, and all sales activities are carried out in South Korea. But the company still plans to cooperate with CFIUS’s review requirements.

On August 30, Magna Semiconductor stated in a document submitted to the U.S. Securities and Exchange Commission (SEC) that the U.S. Treasury Department wrote to the company’s legal counsel last Friday, stating that the acquisition “posed a risk to U.S. national security.” , Is expected to seek a decision on this matter from US President Biden (Joe Biden).

People familiar with the situation in South Korea said that because the Biden administration has been putting pressure on China’s intention to develop its own semiconductor industry, they expect the transaction to fail.

CFIUS, a subsidiary of the US Treasury Department, ordered the suspension of this transaction in June.

The documents submitted to the SEC did not specify the nature of the risk.

According to the document, Magna Semiconductor is evaluating its next steps, but there is no guarantee that it will agree to a proposal that will help obtain CFIUS approval. A spokesperson for Magna Semiconductor declined to comment further.

Magna Semiconductor is mainly engaged in the production of OLED Display driver ICs (DDI) and automotive power control power semiconductors. According to data from the market research organization Omida, Magna’s market share in the field of OLED Display driver chips is 33.2% in 2020. After Samsung Electronics, it ranks second in the world.

Since Magna Semiconductor is also a major supplier of OLED panel driver chips for Samsung and LG Display, this acquisition has also caused concerns among the Korean people and the industry.

After the acquisition of Magna Semiconductor by Zhilu Capital in March of this year, Koreans worried about the leakage of technology to China and initiated a petition on the official website of the Presidential Palace to ask President Moon Jae-in to block the acquisition. At that time, there were more than 5,000 people. Co-sign.

According to the official website, Zhilu Capital is headquartered in Beijing. It is a global professional equity investment institution focusing on semiconductor core technology and other emerging high-end technology investment opportunities. The company’s investors include high-tech companies, large financial institutions and family funds, etc. .

The global chip shortage has led to a slowdown in production in the automotive and technology industries, prompting calls for the United States to reduce its dependence on China, and leading to efforts such as the passage of the “American Innovation and Competition Act” by the U.S. Senate, which authorizes approximately $190 billion to strengthen U.S. technology And research regulations.

 

The Links:   SP12N002 PM10RSH120

Technical analysis of upper computer monitoring and control system for active suspension bench test

The active suspension bench test measurement and control system based on the PXI platform described in this paper, the system hardware is easy to configure, with a PXI chassis As the foundation, with different PXI boards, a variety of functions can be realized, the cost is not high, and the functions are comprehensive

Authors: Zhang Xudong, Guan Jifu, Gu Liang

The active suspension bench test measurement and control system based on the PXI platform described in this paper, the system hardware is easy to configure, with a PXI chassis As the foundation, with different PXI boards, you can achieve a variety of functions, low cost, comprehensive functions, scalability, and upgradeability It has the advantages of high test accuracy and high reliability. “

challenge:

With the continuous improvement of people’s requirements for the smoothness and handling stability of vehicles, it is hoped that when the vehicle load, driving speed, road condition There is a growing need for active vehicle suspension as the vehicle automatically adjusts the stiffness of the suspension system as driving conditions change Increase. At the same time, the industry’s research on active suspension systems has also become more in-depth and extensive. For active suspension systems, there are many types of actuators that generate active power, and the active control algorithms are also different. Therefore, , a flexible and convenient active suspension bench test measurement and control system that has good compatibility with various mechanical structures and control algorithms. ​necessary.

Solution:

According to actual needs, this paper establishes an active suspension bench test host computer monitoring and control system. Using this system, the comprehensive performance of various active suspension systems can be fully tested, and the host computer system can be used for comprehensive testing. Apply various control algorithms written by the user to the active suspension to verify the control effect and find the best control scheme for the active suspension The development and refinement of the rack system provides the means for design and verification.

Technical analysis of upper computer monitoring and control system for active suspension bench test

1. System Platform Overview

The hardware part of the measurement and control platform of this active suspension system is built on the basis of the PXI system. PXI (PCI eXtensions for Instrumentation, PCI extensions for instrumentation systems) technology was developed in 1997 and officially launched in 1998 to An open industry standard introduced to meet the increasing demand for complex instrumentation systems.

PXI is a rugged PC-based measurement and automation platform. PXI combines the electrical bus features of PCI with the rugged, modular and Eurocard mechanical packaging features of CompactPCI, and adds A dedicated sync bus and key software features are included. This makes it a high-performance, low-cost carrier platform for measurement and automation systems. These systems can be used in a variety of fields such as manufacturing test, military and aerospace, machine measurement and control, automotive production, and industrial test.

2. The hardware structure and characteristics of the measurement and control system platform

The hardware is mainly composed of six parts: host computer, signal preprocessing module, sensor, hydraulic test bench, active suspension system, PXI chassis and signal acquisition and output boards. The host computer is used to measure and control the simulation process, analyze and save the simulation results, run the algorithm model, and output control signals to execute the The signal preprocessing module is used to provide a constant current source for the sensor, eliminate the Voltage offset, and increase the control signal. Drive capability; sensors include pressure sensors, displacement sensors, acceleration sensors, and temperature sensors to obtain data required by control algorithms; hydraulic test bench Provide an excitation source for the active suspension to simulate actual road conditions; the active suspension system is equivalent to the actuator of the control algorithm, including components such as shock absorbers, oil and gas suspensions, hydraulic pumps, and various proportional valves and on-off valves that control the on-off of hydraulic pipelines; The above-mentioned links are organically combined into a complete closed-loop system. The structural framework of the measurement and control platform is shown in the figure below:

Technical analysis of upper computer monitoring and control system for active suspension bench test
Figure 1. Structural framework of measurement and control platform

The upper computer and the controller are connected through a network cable, and the measurement and control of the simulation process by the upper computer is realized by sharing variables.

The monitoring system can centrally configure each equipment involved in the test, and can start, stop and adjust all equipment at the upper level. It is completed on the machine, which makes the operation of the test personnel easy and convenient, reduces the labor intensity of the test, and improves the efficiency of the test. Through the computer Display screen, the test personnel can understand the temperature, pressure, Acceleration and motion travel and other data, and perform related measurement and analysis, based on which to judge the performance of the suspension system and the vibration reduction effect, and at any time Human intervention is possible.

The host computer is the core of the entire measurement and control system, with a good human-computer interaction interface, and it is also the carrier of the measurement and control software. NI’s PXI chassis, controllers and application software developed based on LabVIEW constitute a virtual instrument measurement and control platform. It has the functions of fully digital acquisition, test and analysis, rich hardware and software resources, strong scalability, automatic test process, high test accuracy, It has the advantages of good repeatability, convenient operation and high cost performance.

A temperature sensor and a pressure sensor are installed in the oil and gas suspension and shock absorber cylinder, and the unsprung mass shaft head and An accelerometer is installed on the sprung mass, and a pull-wire displacement sensor is installed between the unsprung and sprung masses .The signal collected by the sensor eliminates the offset through the signal conditioning module, and transmits it to the analog signal interface of the PXI board. After conversion, transmit to the host computer

The connection relationship of the active suspension measurement and control system bench test hardware part is shown in the figure below

The control signal output by the active suspension bench test measurement and control system is divided into two types: 3 PWM signals and 1 switching signal. . The PWM signal is used to: 1) drive the motor, drive the hydraulic pump, and provide the power source for the entire active suspension system; 2) adjust the ratio Adjust the opening of the relief valve to control the pressure value in the hydraulic pipeline; 3) Adjust the opening of the damping valve, Realize the adjustment of the damping ratio to achieve the purpose of adjusting the damping force. 1-way switch signal is used to adjust the on/off of the 2/2-way valve to realize the on/off function of the active suspension. The control signal output by the PXI board first increases the driving capability of the signal through the signal preprocessing module, and then connects to the ​Control component.

Technical analysis of upper computer monitoring and control system for active suspension bench test
Figure 2 The connection relationship of the active suspension measurement and control system

Figure 3 The connection relationship of the bench test hardware part of the active suspension measurement and control system

3. Measurement and control system platform software design and application method

The host computer monitoring program can realize the collection, recording, analysis, calculation and other functions of the bench test data, and can Record data, analyze results, and graphs to generate test reports. The debugging, measurement and control of the test system are all automated, with high reliability, and the operation interface is friendly and convenient, easy to use ​Use.The main functions of the detection software are shown in the table below

Table 1 Software function table
Technical analysis of upper computer monitoring and control system for active suspension bench test

3.1 Operation interface

The software part of the bench test measurement and control system is written based on the LabVIEW virtual instrument development environment, which can realize multi-channel signal acquisition, measurement, and analysis , control signal output, test data saving, reading and other functions, can fully cope with various active or semi-active suspension bench tests The operation interface is similar to the oscilloscope commonly used in the laboratory, and it is easy to use

3.2 Data collection and analysis functions

The measurement and control system uniformly measures and analyzes the parameters required by the active suspension control algorithm, following the connections shown in Figure 1.3. The relationship between the temperature, pressure, acceleration, displacement and other sensors to measure the signal through the signal conditioning 0~5V standard signal to the PXI system , and displayed on the measurement and control interface.

Technical analysis of upper computer monitoring and control system for active suspension bench test
Figure 4 The main interface of the host computer monitoring program operation

The operation interface, in the form of tabs, divides the system into waveform browsing/setting, waveform measurement, FFT spectrum, and waveform playback. Five functions of analysis of amplitude and frequency characteristics, in addition, the system can also adjust the X and Y axes of the waveform according to the actual needs of the operator Coordinate range, real-time capture of waveform graph, current waveform and save as .dmp file, editing experiment name, experimenter and file name, etc. ​function. Before starting the system, you should first set the sampling rate. After the system is running, you can perform corresponding operations according to actual needs to achieve Browse, measure, analyze, and record acquired data. The main operation interface of the system is shown in the figure below.

Technical analysis of upper computer monitoring and control system for active suspension bench test
Figure 5. Host computer program filter options

The measurement and control platform provides a variety of measurement analysis and data processing options for the measured data:

A. Filter settings

The measurement and control platform provides a wealth of filtering methods, which can be set according to different situations, including Bessel, Butterworth, 5 filter topologies such as Chebyshev, Inverse Chebyshev, and Ellipse, high-pass, low-pass, band-pass, band-stop, smooth, etc. 5 filter types, and can set the filter high and low cutoff frequency, filter order, and IIR/FIR selection accordingly.

B. Waveform​Measurement

The measurement and control platform can measure any sensor signal of the bench test system. The content of the test interface agent is shown in the figure below.

C. FFT​ spectrum

The measurement and control platform can perform FFT amplitude (root mean square), FFT amplitude (peak), power Spectral and Power Spectral Density measurements, and Display the measurement results as waveforms.

D. Amplitude-frequency characteristic analysis

The measurement and control platform calculates the amplitude-frequency characteristics of the vehicle body acceleration and the amplitude-frequency characteristics of the moving stroke according to the signals measured by the acceleration sensor and the displacement sensor. .

Technical analysis of upper computer monitoring and control system for active suspension bench test

3.3 Waveform recording and playback functions

The test system needs to collect 7 channels of data at the same time. When debugging the algorithm, the test cycle is often very long, and the Requires multiple experiments with an algorithm or product. Therefore, the original experimental data saving and playback functions are designed in the experimental program. This function provides a convenient and simple operation for saving test data, and at the same time, avoids the test caused by human factors as much as possible. Inconsistent parameter settings, or omission of experimental data, ensured the consistency of repeated experiments.

The data measured during the experiment and some other information during the experiment, such as the name of each measurement channel, the total number of samples collected, the sampling The interval, experiment operator name, experiment date, etc., will all be saved in the file.The file name and save path of the test data file can be customized and edited by the test operator according to personal habits

The test data playback interface is shown in the figure below. In order to facilitate the test personnel to analyze and compare the previous test data, the measurement and control system provides a data playback function, which can Import the raw data into the system to obtain the time domain signal corresponding to the data, the power spectral density of the acceleration signal, and the amplitude-frequency characteristics of the vehicle acceleration. Graph and Amplitude-Frequency Characteristic Graph of Body Moving Stroke. The waveform data playback interface is shown in the figure below.

Technical analysis of upper computer monitoring and control system for active suspension bench test
Figure 9 PC program waveform data playback interface

3.4 Measurement and control system platform application method

1) System initialization: After entering the test system, the first step is to initialize the system, mainly for the sensor calibration module, The signal acquisition module, the control signal output module, the measurement and control system monitoring module, and the control algorithm import module are initialized. Report an error to the abnormal situation, and make necessary preparations for the operation of the measurement and control system.

2) Set corresponding test parameters and test information: including sampling information, test time, tester, test remarks, etc.

3) Sensor calibration: Any sensor will have errors at the beginning of use or after a period of use. To ensure test accuracy, the sensor must be calibrated to obtain a new calibration value. The method of calibration is to measure 5 or more points within the valid test range, enter the corresponding parameter values, and calculate According to the input value, the computer uses the method of linear regression to calculate, and obtains the regression equation, the maximum calibration value, the maximum voltage value, the absolute error relative error, etc., and store these values ​​in the appropriate file.

4) Import the control algorithm into the active suspension bench test measurement and control system, and establish the corresponding relationship between the algorithm parameters and the hardware interface: first Compile the control algorithm file into a dynamic link library file, and then import the compiled dynamic link library file into the measurement and control system , select the communication rate between the model and the hardware and the hardware I/O port to use in the system, establish the port and A mapping of algorithm parameters.

5) Run the active suspension bench test measurement and control system: until the set test content is completed, the system stops working, and the error occurs during the start test. The system automatically shuts down or man-made emergency stop caused by system abnormality.

6) Real-time acquisition, processing and analysis of measured data: This system includes signal filtering topology, filtering type, and low cutoff Frequency, high cutoff frequency, order, filter function settings such as IIR/FIR, max, min, rms for all signals Value, Fundamental Frequency, DC Value, Period Average, Rise Time, Fall Time, and can calculate acceleration and displacement signals Amplitude spectrum, RMS spectrum, power spectrum, and power spectral density can calculate the amplitude-frequency characteristics of vehicle sprung mass acceleration, Amplitude-frequency characteristics of moving stroke.

7) Real-time storage of measurement data: mainly store the collected signals on the local hard disk in the LabVIEW-specific .tdms file format , or store the data in a database for later analysis or processing.

8) Real-time display and playback of the measured data: mainly to carry out the collected signals in the time domain and frequency domain Real-time display; can also re-read the saved .tdms file and display it on the host computer terminal. Through the comparison of the results of many experiments, it is easy to know the advantages and disadvantages of each control algorithm, so as to choose the appropriate control algorithm. Provide a basis.

9) After the test is completed, the test results can be printed according to different report formats, and the control effect of the control algorithm can be comprehensively evaluated.

4 Conclusion

The design described in this article provides a test system that not only meets the test requirements of active suspension systems, but is also fully compatible with semi-active And passive suspension test, the test process is automated, high precision, good repeatability, and compared with foreign equipment with the same function, the price is low , the hardware configuration is simple, and the scalability is strong.

The Links:   SX14Q006 LA084X01-SX01

In-depth interpretation of HDR technology is full of dry goods!

We are in a colorful world. In order to present this colorful world to our eyes through the Display screen, human beings invented cameras, video cameras, televisions and other equipment, and also developed many advanced technologies. HDR is one of them. .

We are in a colorful world. In order to present this colorful world to our eyes through the Display screen, human beings invented cameras, video cameras, televisions and other equipment, and also developed many advanced technologies. HDR is one of them. .

What is HDR?

The full name of HDR is High-Dynamic Range, that is, high dynamic range image technology. This technology was first applied to photography. Turning on HDR during the shooting process can make the original dark scene brighter and more transparent. Now, HDR technology has been applied to various aspects such as home appliances and smart terminals.

What can HDR bring?

Take a computer monitor as an example. The range of brightness that can be displayed by traditional displays is extremely limited, which is far from the range that the human eye can perceive. The reason is that the brightness of the traditional display in the bright part of the screen cannot be increased, and the dark part cannot be darkened. This leads to a poor sense of layering in the final perception of the human eye, and a lot of details are lost.

HDR ultra-quality display technology can perfectly solve this problem. Compared with the mainstream SDR 1080P display technology on the market, HDR has a higher pixel load: 3840×2160; a wider color gamut range: BT2020. The same picture can display more color information and more detailed textures of the image. At the same time, with more advanced electro-optical conversion technology, the light and dark contrast of the picture is improved in all directions, so that a picture can show the most realistic appearance in all directions.

In-depth interpretation of HDR technology is full of dry goods!

HDR and IPS hard screen

When it comes to IPS hard screens, it is well-known. LG Display’s “Golden Sign” has not only made many TV manufacturers “love”, IPS hard screens have given us a good reputation for excellent performance, durability and reliability. The 4-color HDR LCD panel is based on the IPS hard screen, and the HDR technology is directly embedded on the panel, which integrates the HDR characteristics into the blood source of the LCD panel. This is the most essential difference between the 4-color HDR LCD panel and other LCD panels.

The 4-color HDR LCD panel not only can better analyze the HDR film source, but also has the characteristics of ultra-wide viewing angle, high brightness, and low energy consumption. More importantly, the 4-color HDR LCD panel continues the IPS hard screen with ultra-wide viewing angle and color. The advantage of high degree of reduction is of great significance to mainstream consumer groups.

Nearly complete presentation of HDR film source effects

HDR technology improves the picture quality effect, but what restricts its further development is the problem of film source. The HDR algorithm independently developed by LG Display can convert ordinary SDR film sources into close to HDR image effects, greatly improving the application field of HDR, and not only that, it can also improve the HDR image effect when playing HDR film sources.

In-depth interpretation of HDR technology is full of dry goods!

For this reason, LG Display takes the lead in embedding HDR technology on the 4-color ultra-high-definition LCD panel. The HDR algorithm can be optimized to present the HDR film source almost unreservedly to the audience, making the picture closer to the real scene, and details in the dark. Better performance. So, how to determine whether the HDR effect of a TV product is good or not, the measurement data certified by the authority is the most convincing.

In summary, HDR technology is not simply attached to a screen. It requires complete HDR shooting, HDR chip decoding and then HDR screen display to present higher quality content. LG Display’s 4-color HDR technology can be regarded as the best LCD technology for HDR technology with its “HDR algorithm embedded in the LCD panel”.

The Links:   LQ080V3DG01 https://www.slw-ele.com/ltm190e4-l02.html“> LTM190E4-L02

Is it still “poor” for the ten trillion-level smart car market to take off?Academician: It is very important to improve the “endogenous safety” of automobiles

Is it still “poor” for the ten trillion-level smart car market to take off?Academician: It is very important to improve the “endogenous safety” of automobiles

The first batch of 200 Beta experience versions of Zhiji L7 were officially delivered offline

As a strategic pillar industry of the national economy, automobiles are undergoing the transformation of electrification, intelligence and networking, and transportation is also transforming from traditional transportation to intelligent transportation. Many technology and industrial giants around the world have invested heavily in the field of intelligent vehicles. New forces are quietly emerging.

Compared with traditional cars, the network security issues of intelligent connected cars are like a “ceiling” that slows down the momentum of industry development. At the first council meeting of the Shanghai Intelligent and Connected Vehicle Network Security Industry Collaborative Innovation Center held recently, experts said that the Internet of Vehicles is still in the acceleration stage, and the network security industry is in the early stage of development. Shanghai should seize the opportunity to become a national The “engine” of the network security industry of intelligent networked vehicles.

Hundreds of millions of lines of code in a car, loopholes are inevitable

ICVs are composed of key systems such as perception systems (cameras, radars, maps and positioning), control systems (algorithms, chips, operating systems), and execution systems (integrated control systems). Li Yufeng of Shanghai University said: “The code of some smart cars has exceeded 100 million lines, and there are no security holes. Is it possible?”

According to the barrel theory of network security, the degree of security is determined by the “short board”. Guo Hui, chief technology officer of SAIC Zhiji Automobile, said that the automotive industry has a very complex supply chain. For example, if a CNC system supplier is designed with open source software, there may be security risks.

At the “Strong Net” Mimic Defense International Elite Challenge held at the end of last year, 48 top teams at home and abroad carried out high-intensity “thorns” on 8 models of 16 models of intelligent networked vehicles. Within 72 hours, the cars endured a total of 40 More than 10,000 attacks have finally screened out more than 300 effective vulnerabilities, effectively increasing the “security plank”.

Wu Jiangxing, an academician of the Chinese Academy of Engineering, said that the functional safety of the traditional automobile industry has strict quantitative standards and evaluation systems, but the network security of smart cars cannot be measured. Whether the in-vehicle network is safe is still a conceptual expression. Therefore, it is necessary to have an organization to solve the key technical problems of intelligent networked vehicle safety, promote the application of my country’s unique and original endogenous safety technology, and provide high reliability, high availability and high credibility for the digital transformation and intelligent evolution of the manufacturing industry. Assure.

It is better to “strengthen yourself”

“Finding loopholes” is to make up for it, and it requires a lot of manpower and material resources to find and remedy, but it is too difficult for a highly complex integrated system such as an intelligent networked vehicle. From the challenge, we can see some of the characteristics of hackers’ cyberattacks on cars: in the opening 5 hours, almost no one cared about the cars, and the more the deadline for the competition, the more intensive the attacks. Even with good results, no one can guarantee that the vulnerability has been “zeroed out”.

In this environment, “endogenous security” is particularly important. “Endogenous security” is an innovative technology proposed by Chinese scientists in response to the worldwide common problems and stubborn diseases in the field of network security. It has strong self-immunity and can operate under the conditions of “toxic carrier”.

Li Yufeng introduced that his team and Zijinshan Laboratory took the lead in proposing an integrated guarantee method for the functional safety and network security of intelligent networked vehicles on the basis of the cyberspace endogenous security theory pioneered in my country. The team carried out the verification of the endogenous safety autonomous driving principle, initially formed the theoretical framework of the endogenous safety of the intelligent networked vehicle, and achieved a number of expected results of the basic principle verification, which is expected to solve the “pain point” of the safety of the intelligent networked vehicle industry. A new path of high reliability, high reliability and high availability.

Leverage the 10 trillion-level market and solve the worries of consumers

The McKinsey report said that over the next decade, the automotive industry will face dramatic changes unseen in a century, with the global automotive software and electronics market growing to $469 billion by 2030. A separate survey of consumers around the world for self-driving cars found that their top concern was cybersecurity.

How to respond to consumer concerns and leverage the 10 trillion-level market? Shanghai released the “Action Plan for Building Cybersecurity Industry Innovation Highlands (2021-2023)”, which clearly proposed to build 10 cybersecurity industry collaborative innovation centers to promote multi-party collaboration among production, academia, research, and use.

Academician Wu Jiangxing introduced that the newly established Collaborative Innovation Center for the Cybersecurity Industry of Intelligent Connected Vehicles is the first collaborative innovation center in the field of cybersecurity in Shanghai. co-organized. In addition to focusing on technical issues such as building enterprise-level special vulnerability libraries and high-efficiency detection security tools, the center will also explore a series of issues that people care about, such as auto insurance.

“With endogenous safety as the basic standard of the intelligent networked vehicle machine system, embedding safety genes from the ‘bones’, accelerating the deep integration with the insurance and financial industry, and formulating the intelligent networked vehicle network security standards and specifications, Shanghai will hopefully be one step ahead of others. It will drive the blue ocean market of future cars.” Wu Jiangxing said.

The Links:   6MBI25F-120 https://www.slw-ele.com/ltd056et2s.html“> LTD056ET2S

Pin Function and Application Scheme of 12-bit Analog-to-Digital Converter MAX120

MAX120 is a new product recently introduced by MAXIM Company in the United States. It is a 12-bit analog-to-digital converter with sampling circuit produced by BICMOS process, and integrates track/hold (T/H) and precision power supply. Its conversion time is 1.6μs, the sampling rate is 500Ksps, the internal and external sampling modes are optional, the continuous conversion mode is optional, the input Voltage is ±5V, the limit value is ±15V, the power consumption is 210mW, there is no missing code at full temperature, and it can It is convenient to interface with general microprocessors, suitable for high-speed data acquisition and processing systems, and meets the requirements of high-speed and high-precision data processing.

Authors: Gong Lanfang; He Jiabin;

MAX120 is a new product recently introduced by MAXIM Company in the United States. It is a 12-bit analog-to-digital converter with sampling circuit produced by BICMOS process, and integrates track/hold (T/H) and precision power supply. Its conversion time is 1.6μs, the sampling rate is 500Ksps, the internal and external sampling modes are optional, the continuous conversion mode is optional, the input voltage is ±5V, the limit value is ±15V, the power consumption is 210mW, there is no missing code at full temperature, and it can It is convenient to interface with general microprocessors, suitable for high-speed data acquisition and processing systems, and meets the requirements of high-speed and high-precision data processing.

The following briefly introduces the main pins and functions of the chip.

● MODE is the mode input terminal. When MODE=VDD, INT/BUSY is used as an interrupt signal; when MODE=OPEN or MODE=DGND, INT/BUSY is used as BUSY output;

● CONVST is the conversion start input terminal, and the conversion starts at the falling edge of the waveform;

● The output of INT or BUSY indicates the status of the converter;

● CS is the chip select terminal, low level is valid, when it is low level, three-state data output is allowed; when both CONVST and RD are low level, a conversion is started on the falling edge of CS.

● RD is read input terminal, low level is valid, when it is low level, three-state data output is allowed; when both CONVST and RD are low level, a conversion is started on the falling edge of RD.

Operating mode

The MAX120 has five operating modes.

● Full Control Mode (Mode 1): Provides the user with maximum control to control the start of conversion and fetch operations. The full control mode is used for the microprocessor system (μP) that inserts or cannot insert the wait state, and can interface with the bus of the DSP.

● Standalone mode (mode 2) and continuous conversion mode (mode 5): for systems without a processor, or for processor-based systems where the ADC and processor are buffered by a first-in-first-out (FIFO) It is usually not directly connected to the DSP if it is interfaced with a processor or direct memory access (DMA).

● Slow storage mode (mode 3): It is mainly used in systems where the processor can be forced into a waiting state during ADC conversion, and can interface with the DSP’s bus.

● ROM mode (mode 4): used in systems where the processor cannot be forced to enter a waiting state, and can interface with the DSP’s bus.

In these 5 operating modes, the start-up of the converter is controlled by one of 3 digital input signals (CONVST, RD or CS). In either mode, CONVST must be low to start a conversion, and once a conversion is entered, it cannot be started. The read operation is controlled by RD and CS. To read the output data, these two digital input signals must be low level, and the working state of the INT/BUSY output converter determines when the last conversion time is valid.

In addition, the mode input terminal MODE has the following provisions for the output of INT/BUSY:

If MODE=VDD, INT/BUSY is an interrupt signal. At this time, INT/BUSY is low level. After the conversion data is read, INT/BUSY returns to high level.

If MODE is open or connected to digital ground, INT/BUSY is output as BUSY. At this time, INT/BUSY becomes low level when the conversion starts, and rises to high level after conversion, and the data is valid at D0~D11.

MAX120 interface example

Generally, the analog signal must be buffered and amplified before the A/D conversion to reduce the impact on the A/D converter. This interface circuit uses the LF353 high-speed integrated operational amplifier to form a signal buffer amplifier, as shown in the figure.

Pin Function and Application Scheme of 12-bit Analog-to-Digital Converter MAX120

The analog signal is input from the AIN terminal. CLKIN is the A/D conversion pulse input end of the A/D converter, this pulse signal is taken from the ALE end of the single-chip microcomputer, and the single-chip microcomputer can use 80c32. CONVST is connected to the P1.0 port of the microcontroller, and starts an A/D conversion on the falling edge of the pulse. The output of the data is controlled by chip selection CS and RD; Y0, Y1, Y2 are taken from the output end of the decoder connected to the microcontroller. Y0 and RD control the data output of the A/D converter. When Y0 is valid, the falling edge of RD outputs data, and the rising edge of RD is reversed by the Inverter as the input latch pulse of the latch 74F373. 12 bits of data are latched in 2 latches. Y1 and RD are used to control the lower 8-bit data in the read latch; Y2 and RD are used to control the upper 4-bit data in the read latch.

concluding remarks

There are many A/D conversion chips used in data acquisition systems, and their application fields are also relatively wide. As a new member of the A/D family, MAX120 continues the functions of existing products, and also has advantages in data acquisition speed and accuracy. It is very ideal as a data acquisition component in signal processing systems such as speech and noise and automatic control systems with high dynamic performance requirements.

The Links:   6MBI200FB-060 EPM570T100I5N MY-IGBT

Analyze the method of power field effect tube protection circuit design

Do you know how to analyze the design of power FET protection circuit? What does it do? What is a protection circuit?

Do you know how to analyze the design of power FET protection circuit? What does it do? What is a protection circuit?

In view of the fact that there are some unstable factors in the power circuit, the circuit designed to prevent such unstable factors from affecting the circuit effect is called a protection circuit. For example, there are overcurrent protection, overvoltage protection, overheating protection, no-load protection, short circuit protection, etc.

Analyze the method of power field effect tube protection circuit design

Design of Power Field Effect Tube Protection Circuit

Power MOSFETs have many advantages, but MOSFETs have a relatively fragile ability to withstand short-term overloads, especially in high-frequency applications. Therefore, in the application of power MOSFETs, a reasonable protection circuit must be designed to improve the reliability of the device. sex. The power MOSFET protection circuit mainly has the following aspects:

1) Prevent the gate di/dt from being too high:

Due to the driver chip, the output impedance is low. Directly driving the power tube will cause the driven power tube to turn on and off quickly, which may cause Voltage oscillation between the drain and source of the power tube, or may cause the power tube to suffer excessively high Di/dt caused by misconduction. In order to avoid the occurrence of the above phenomenon, a resistor is usually connected in series between the output of the MOS driver and the gate of the MOS tube, and the size of the resistor is generally selected to be several tens of ohms.

2) Prevent overvoltage between the gate and source. Because the impedance between the gate and the source is very high, the sudden change of the voltage between the drain and the source will be coupled to the gate through the capacitance between the electrodes, which will generate a relatively high gate-source spike voltage. It will cause the breakdown of the very thin gate-source oxide layer. At the same time, the gate can easily accumulate charge and the gate-source oxide layer will break down. Therefore, the zener tube must be connected in parallel with the MOS tube gate to limit the gate voltage in the zener tube. Below the voltage value, the MOS tube is protected from breakdown. The parallel resistance of the MOS tube gate is to release the gate charge and prevent the charge from accumulating.

3) Protection against overvoltage between drain and source

Although the drain-source breakdown voltage VDS is generally very large, if the drain-source is not equipped with a protection circuit, it is also possible that the drain spike voltage will be generated due to the sudden change of the device switching instantaneous current, which will damage the MOS tube, and the faster the power tube will switch. , The higher the overvoltage generated. In order to prevent device damage, protection measures such as Zener diode clamp and RC snubber circuit are usually adopted.

When the current is too large or a short circuit occurs, the current between the drain and source of the power MOSFET will increase rapidly and exceed the rated value. The power MOSFET must be turned off within the time specified by the overcurrent limit value, otherwise the device will be burned out Therefore, a current sampling protection circuit is added to the main loop. When the current reaches a certain value, the drive circuit is turned off by the protection circuit to protect the MOSFET. Figure 1 is the protection circuit of the MOSFET, which can clearly see the function of the protection circuit.

Lithium battery protection circuit

It consists of two field effect transistors and a dedicated protection integrated block S–8232. The overcharge control tube FET2 and the overdischarge control tube FET1 are connected in series in the circuit, and the battery voltage is monitored and controlled by the protection IC. When the battery voltage rises to 4.2V, The overcharge protection tube FET2 is turned off and charging is stopped. In order to prevent malfunction, a delay capacitor is generally added to the external circuit. When the battery is in a discharging state, when the battery voltage drops to 2.55V, the over-discharge control tube FET1 is cut off and stops supplying power to the load.

Overcurrent protection is to control FET1 to cut off and stop discharging to the load when a large current flows through the load. The purpose is to protect the battery and the field effect tube. Overcurrent detection uses the on-resistance of the field effect tube as the detection resistance, monitors its voltage drop, and stops discharging when the voltage drop exceeds the set value. A delay circuit is generally added to the circuit to distinguish between surge current and short-circuit current. The circuit has complete functions and reliable performance, but it is highly professional, and the dedicated integrated block is not easy to buy, and it is not easy to imitate by amateurs.

Because overcharge or overdischarge of Li+ batteries may cause an explosion and cause personal injury, safety is the main concern when using this type of battery. Therefore, commercial lithium-ion battery packs usually include protection circuits like DS2720 (Figure 7). DS2720 provides all the protection functions required for rechargeable Li+ batteries, such as: protecting the battery during charging, preventing circuit overcurrent, and extending battery life by limiting the battery’s discharge voltage.

The Links:   MG30G1BL2 FS100R06KE3

A mutated new coronavirus has been discovered in the UK, sources say

When it comes to the novel coronavirus, people all over the world feel deeply. 2019 Novel Coronavirus, on January 12, 2020, the World Health Organization officially named it 2019-nCoV [1] . Coronaviruses are a large family of viruses known to cause colds as well as more serious diseases such as Middle East Respiratory Syndrome (MERS) and Severe Acute Respiratory Syndrome (SARS). The novel coronavirus is a new strain of coronavirus that has never been found in humans before.

Recently, the epidemic situation in the UK has become more and more troublesome. The mutated virus has not been dealt with before, and now a new mutated new coronavirus has emerged.

A mutated new coronavirus has been discovered in the UK, sources say

According to data released by the British government on the 23rd, there were 39,237 new confirmed cases of new crowns in the country in the past 24 hours, and a total of 2,149,551 confirmed cases.

According to reports from British media such as the BBC and the Guardian on December 23, local time, British Health Secretary Matt Hancock confirmed at a press conference at the Downing Street Prime Minister’s Office that day that the British Two cases of another variant SARS-CoV-2 have been identified.

Hancock said both cases had contact with people who had been to South Africa. The UK has isolated both cases and restricted travel from South Africa. Anyone who has been to South Africa in the past two weeks and who has been in close contact with someone who has been to South Africa in the past two weeks must be quarantined immediately.

According to CCTV news, British Health Secretary Hancock said at a press conference on the 23rd that the United Kingdom has detected two cases of infection with another variant of the new coronavirus, both of which had contact with people who had been to South Africa. Hancock said the virus was more contagious and more mutated than previously found in the UK.

According to the Global Times, the WHO said on the 21st that although the variants of the new coronavirus discovered in South Africa appeared at about the same time as the variants discovered in the UK, they were unrelated variants and had nothing to do with each other.

According to Overseas Network, earlier, British Prime Minister Boris Johnson and scientists confirmed that a new variant of the new coronavirus found in the United Kingdom is 70% more infectious than the ordinary new coronavirus. The British side said that the new variant may have spread abroad, and the most urgent work is to ensure that this variant virus does not cause a higher death rate.

Academician Zhong Nanshan of the Chinese Academy of Engineering said at the event that the situation in the future will become more and more divided or integrated, which is a severe test. There are more and more patients with new coronary pneumonia in the world, and a variant virus was discovered in September, but it was not discovered after vaccination.

The mutated virus that appeared in the UK is said to increase the infection rate by 70%, and more than 100 countries around the world have banned British flights. However, there is no specific content on whether the case fatality rate has changed, and there is no further evidence on whether it affects the effectiveness of the vaccine.

Generally speaking, more variants of the virus may weaken the immune effect of the vaccine, which is similar to the relationship between the influenza virus and the vaccine, so it is a common practice in many countries to get the influenza vaccine once a year.

But the virus doesn’t suddenly mutate and make the vaccine completely ineffective. Jesse Bloom, an expert at the Fred Hutchinson Cancer Research Center in Seattle, USA, said that even the flu virus takes five to seven years to mutate enough to completely escape the body’s immune recognition, and the coronavirus is similar.

Valens, Britain’s chief scientific adviser, said preliminary conclusions suggested the new variant was unlikely to affect vaccine efficacy. “It is reasonable to assume that a vaccine response to this virus should be adequate, but we need to be vigilant about that.”

Therefore, before the end of the new crown virus epidemic, we should strengthen prevention and personal protection.

The Links:   CM100DC-24NFM FF300R12KT4

Analysis of competition topics: 2021 topic E “Digital-Analog Signal Hybrid Transmission Transceiver”

Design and manufacture a wireless transceiver that performs mixed digital-analog signal transmission on the same channel. Among them, the digital signal is composed of a group of four numbers from 0 to 9; the analog signal is a voice signal, and the frequency range is 100Hz~5kHz. Using wireless transmission, the carrier frequency range is 20~30MHz, the channel bandwidth is not more than 25kHz, and the shortest transmission distance between transceivers is not less than 100cm.

This year’s Electronic competition for college students has ended. The following is an analysis of the E question.

1. Task

Design and manufacture a wireless transceiver that performs mixed digital-analog signal transmission on the same channel. Among them, the digital signal is composed of a group of four numbers from 0 to 9; the analog signal is a voice signal, and the frequency range is 100Hz~5kHz. Using wireless transmission, the carrier frequency range is 20~30MHz, the channel bandwidth is not more than 25kHz, and the shortest transmission distance between transceivers is not less than 100cm.

The sending end of the transceiver completes the digital signal and the analog signal combined processing, and modulates and transmits on the same channel.

The receiving end of the transceiver completes the receiving and demodulation, and separates the digital signal and the analog signal. The digital signal is displayed by a digital tube, and the analog signal is observed by an oscilloscope.

Analysis of competition topics: 2021 topic E “Digital-Analog Signal Hybrid Transmission Transceiver”

2. Requirements

1. Basic requirements

(1) Realize analog signal transmission. The analog signal is a voice signal of 100Hz~5kHz, and it is required that the waveform of the analog signal demodulated by the receiving end has no obvious distortion. When only analog signals are transmitted, the digital Display on the receiving end is off.

(2) Realize digital signal transmission. First, enter a group of 4 numbers from 0 to 9, store and Display it at the sending end, and then press the send key to transmit the digital signal continuously and cyclically. The digital signal is demodulated at the receiving end and displayed through 4 digital tubes. The response time required to start sending to the nixie tube display is no more than 2 seconds. When the sender presses the stop key, the digital signal transmission is ended, and at the same time, the display of the transmitted numbers is cleared at the sender, waiting for a new number to be entered.

(3) Realize the mixed transmission of digital-analog signal. Arbitrarily enter a group of numbers, mix and modulate with the analog signal for transmission. It is required that the receiving end can correctly demodulate the digital signal and the analog signal, the digital display is correct, and the analog signal waveform has no obvious distortion.

(4) The channel bandwidth of the transceiver is not more than 25kHz, and the carrier frequency range is 20~30MHz. It is required that the transceiver can be selected from no less than 3 carrier frequencies, and the specific carrier frequency can be determined by itself.

2. Play the part

(1) After the sending end stops digital signal transmission, the digital display at the receiving end will automatically turn off after a delay of 5 seconds.
(2) On the premise of meeting the basic requirements, the lower the power consumption of the transmitter of the transceiver, the better.
(3) Under the premise of meeting the basic requirements, the frequency range of the analog signal transmitted by the transceiver is extended to 50Hz~10kHz.
(4) Others.

3. Description

(1) The digital and analog signals must be processed by the combined circuit first, and then modulated and transmitted on the same channel. The modulation mode and modulation degree are determined by themselves. An observation port should be reserved at the output end of the combined circuit for the oscilloscope to observe the waveform change of the combined signal.
(2) There shall be no connection between the transmitter and receiver of the transceiver.
(3) The connection between the transmitting end of the transceiver and the antenna adopts an SMA connector, the transmitting end is an F (female) head, and the antenna end is an M (male) head. The length of the antenna should not exceed 1 meter.
(4) The transmitter and receiver of the transceiver are powered by a single battery, and the power supply circuit of the transmitter should have a test port for power supply Voltage and current.
(5) The selection of the carrier frequency of the transceiver should try to avoid the interference of environmental radio waves.
(6) In this question, the channel bandwidth is agreed to be the -40dB bandwidth of the modulated signal, which is measured by a spectrum analyzer. The details are shown in the figure below.

Analysis of competition topics: 2021 topic E “Digital-Analog Signal Hybrid Transmission Transceiver”

Topic analysis and program design

This topic is a relatively complete wireless transceiver system, which requires simultaneous interpretation of analog signals and digital signals.

According to the description of the requirements for analog signal transmission in the title, the analog signal adopts the analog transmission method. The frequency range of the analog signal to be transmitted is 50Hz~10kHz. If AM modulation is used, the required channel bandwidth is 20kHz.

The digital signal to be transmitted is a 4-digit decimal number, plus redundant information such as the synchronization header and check code of the data frame, the number of bits to be transmitted should not exceed 40. The title also stipulates that the time from the start of transmission to the terminal display does not exceed 2 seconds, so the actual transmission bit rate can be as low as 20bps. According to Shannon’s theorem, as long as the signal-to-noise ratio of the channel is not extremely poor, the channel bandwidth required for data transmission is extremely narrow, which is almost negligible compared with analog signals.

The channel bandwidth specified by the title is 25kHz, the analog signal occupies the middle 20kHz, and the bandwidth of 2.5kHz is left on each side. It is more than enough to place the above digital channels. Therefore, a subcarrier frequency can be selected between 10kHz and 12.5kHz (for example, 11.2kHz, which is the geometric mean of 10kHz and 12.5kHz), and the subcarrier can be modulated with a digital signal to obtain a digital modulated signal (the simplest modulation method is OOK modulation).

Finally, the digital modulated signal and the analog signal are superimposed, and the superimposed mixed signal modulates the carrier wave by AM modulation, and then is amplified and sent to the antenna for transmission. The overall spectral structure is as follows:

Analysis of competition topics: 2021 topic E “Digital-Analog Signal Hybrid Transmission Transceiver”

The circuit structure using this scheme is shown in the figure below.

Analysis of competition topics: 2021 topic E “Digital-Analog Signal Hybrid Transmission Transceiver”

In this scheme, the filter that distinguishes the two signals is the key.

The requirements of the low-pass filter of the analog signal are: there is a large enough attenuation near the sub-carrier frequency of the digital signal, and the attenuation at 12.5kHz should be greater than 40dB. According to these two requirements, it is a better choice to use a high-order elliptic filter and design the first zero frequency of the filter near the sub-carrier frequency of the digital signal. For example, using a 7th-order elliptical low-pass filter with an in-band fluctuation of 0.5dB can achieve attenuation greater than 45dB at 11.2kHz (digital subcarrier frequency) and after greater than 12.5kHz.

The requirement of the band-pass filter of digital signal is: There should be enough attenuation at 10kHz and 12.5kHz. Due to the extremely low bandwidth of digital signals, it is easiest to cascade multiple point-pass filters. For example, if three point-pass filters with a center frequency of 11.2kHz and a Q value of 25 are cascaded, their total bandwidth is about 20Hz, and the attenuation at 10kHz and 12.5kHz is about 45dB.

The receiving part is a typical superheterodyne receiver structure, in which the analog signal reception is basically the same as that of the ordinary AM receiver.

The intermediate amplifier circuit should have the AGC function to ensure that the amplitude of the output signal does not change much when the receiving conditions change, so as to facilitate the subsequent digital signal demodulation.

The decoder structure of the digital receiving part varies with the modulation method. If it is OOK modulation, the amplitude of the signal after passing through the band-pass filter is 1 and 0 of the baseband signal, which can be sent to the microprocessor for decoding as long as it is shaped by the comparator. If it is other modulation methods, it may be necessary to restore the subcarrier as a synchronization signal and then perform synchronization decoding.

Obviously, for the case where the bandwidths of the two signals in this topic are one wide and the other narrow, as long as the spectrum is properly arranged, the above hybrid transmission scheme is effective and the circuit is relatively simple. From the parameters given by the question and the basic requirements 1, description 1 and other conditions, it can be guessed that the proposer also seems to have asked the question according to this mixed transmission scheme.

The Links:   SP14N02L6ALCZ PS11034-Y1

VINFAST announces its pure electric strategy and pure electric vehicle lineup at CES 2022

– VinFast announces that it will stop production of internal combustion engine (ICE) vehicles by the end of 2022 and transition to pure electric vehicle production

– The company will launch a global lineup of pure electric vehicles in the market, subdivided into the ABCDE class

– Now accepting pre-orders for the SUV VF 8 and VF 9 models, with a special thanksgiving program for early bird customers

During VinFast’s Global Electric Vehicle Day at CES 2022, VinFast announced a new growth strategy and unveiled a complete lineup of electric vehicles covering five market segments.

  

VINFAST announces its pure electric strategy and pure electric vehicle lineup at CES 2022

VinFast unveils its full range of electric vehicles at VinFast Global Electric Vehicle Day at CES

VinFast is taking a major step towards a sustainable mobility future following its 2021 debut at the Los Angeles Auto Show, with the company announcing that it will end production of internal combustion engine (ICE) vehicles by the end of 2022. VinFast will focus on the development of pure electric powertrains for its vehicles. This bold move makes VinFast one of the first automotive companies in the world to switch entirely to pure electric vehicles and cements its position as a leader in the global electric vehicle revolution.

While aiming to become a pure electric vehicle manufacturer, VinFast officially launched a series of pure electric vehicles: three models in the ABC class, VF 5 (A class), VF 6 (B class) and VF 7 (C class) ); and two models in the D and E grades, the VF e35 and VF e36 (introduced at the 2021 Los Angeles Auto Show), now renamed the VF 8 and VF 9, respectively. The deletion of the prefix “e” (short for electric) confirms the company’s insistence on the development direction of pure electric.

The five electric models are all designed by world-renowned Italian design houses Pininfarina and Torino Design, and they are impressively modern and impressive.

Eco and Plus versions of the VF 8 and VF 9 models will be equipped with Level 2+ autonomous driving capabilities, and Premium versions will be equipped with Level 3 to 4 autonomous driving capabilities. These models will also offer smart services, including smart home, mobile office, in-car shopping, in-car entertainment, and many other convenient and advanced features to create exciting experiences for every journey and everyday life.

“VinFast builds a sustainable future for people and the planet through green, clean and safe mobility. It’s a future built on smart service, exceptional customer experience and a deep concern for the planet and future generations. VinFast is committed to To provide innovative vehicle design, quality and technology, coupled with outstanding customer service. We aspire to achieve even more – to be one of the world’s leading manufacturers of electric vehicles, while encouraging our many customers to work closely together to participate in electric A vehicle revolution to create a sustainable future for all,” said Ms. Le Thi Thu Thuy, Vice Chairman of Vingroup and Global CEO of VinFast.

At VinFast Global Electric Vehicle Day, the company also officially announced retail pricing for the VF 8 and VF 9 in the U.S., Europe and Vietnam, as well as ground-breaking pre-order offers.

The initial price of the VF 8 is $41,000 in the United States; the lowest price in Europe is 36,000 euros, the price in Vietnam is 961 million VND, and the initial price of the VF 9 is $56,000 (US), 49,000 euros (Europe) and 1.312 billion VND (Vietnam). Each VinFast EV is covered by a 10-year warranty or the first 200,000 kilometers (whichever comes first).

Notably, for a 3-month period from January 5 to April 5, 2022 (PST), VinFast will be launching an exclusive membership program called “VinFirst – Pioneers Tribute to Pioneers” for early birds Bookers are offered a variety of incentives and benefits (see appendix below).

VinFast is the first electric vehicle company to apply blockchain technology to receive orders and confirm ownership. There will be many other incentives for eligible customers in the U.S. to join the VinFirst program in the future. From April 6, 2022, all early bookings can be refunded, forwarded or transferred.

In addition to the shared pricing policy, VinFast also announced an innovative battery rental program that will offer customers two subscription plans: “Flexible” (minimum subscription for 300 miles/500 kilometers per month, 301 Miles/501 km for an additional fee) and “Fixed” (unlimited mileage). Across markets, the monthly cost of driving a VinFast EV is roughly the same as driving a gasoline-powered vehicle. In addition, VinFast will cover all costs of battery maintenance and will replace the owner’s battery free of charge when the charge and discharge capacity falls below 70%.

The pre-order campaign for the VF 8 and VF 9 models officially kicked off on January 5, 2022 at 5pm PT in Las Vegas, USA.

Interested customers can book through the following website: https://reserve.vinfastauto.com/.

  VINFAST announces its pure electric strategy and pure electric vehicle lineup at CES 2022

S6

  VINFAST announces its pure electric strategy and pure electric vehicle lineup at CES 2022

S8

  VINFAST announces its pure electric strategy and pure electric vehicle lineup at CES 2022

S9

  VINFAST announces its pure electric strategy and pure electric vehicle lineup at CES 2022

S10

  VINFAST announces its pure electric strategy and pure electric vehicle lineup at CES 2022

S7

  VINFAST announces its pure electric strategy and pure electric vehicle lineup at CES 2022

S1

About VinFast

VinFast – A part of Vingroup, which aims to promote the global smart electric vehicle revolution movement. Founded in 2017, VinFast has a state-of-the-art automotive manufacturing complex in Hai Phong, Vietnam with world-leading expansion capabilities, achieving up to 90% automation.

VinFast is firmly committed to the mission of enabling a sustainable future for everyone, inspiring customers around the world to co-create intelligence through continuous innovation to bring high-quality products, advanced smart services, seamless customer experience and pricing strategies to all Mobility and the future of a sustainable planet. For more information, please visit: https://vinfastauto.com.

About Vingroup

Founded in 1993, Vingroup is one of the leading private conglomerates in the region, with three public companies with a combined market capitalization of US$35 billion (as of November 4, 2021). Vingroup currently focuses on three areas: technology and industry, service and social enterprise. For more information, please visit: https://www.vingroup.net/en.

About CES (International Consumer Electronics Show)

CES® is the world’s largest and most influential technology event, a renowned destination for breakthrough technologies and innovators from around the world to meet and master the latest technology. CES is hosted by the Consumer Technology Association (CTA®), which covers all areas of technology. For more information, visit CES.tech.

About CTA? (Consumer Technology Association)

CTA® is the largest technology trade association in North America. The association’s members are leaders in global technological breakthroughs – from start-ups to global brands, creating more than 18 million jobs in the United States. CTA owns and hosts CES®, the world’s largest and most influential technology event. For more information, visit CTA.tech. Follow @CTAtech.

Media Contact: [email protected]

appendix

VINFAST announces its pure electric strategy and pure electric vehicle lineup at CES 2022

VINFAST announces its pure electric strategy and pure electric vehicle lineup at CES 2022

VINFAST announces its pure electric strategy and pure electric vehicle lineup at CES 2022

Validity: January 5, 2022 at 5pm (Pacific Standard Time) to April 5, 2022 (Pacific Standard Time)

Customers in the US and Europe receive Electronic vouchers, and customers in Vietnam receive physical vouchers:

Electronic vouchers/physical vouchers can be transferred after April 5, 2022 and valid until December 31, 2023

The e-voucher/physical voucher will not be valid after the reservation payment has been refunded or used at the time of car purchase

Additionally, customers receive:

1 Free VinFast Portable Charger

Complimentary ADAS and Smart Services Package

One or more hotels in Vinpearl, Vietnam are offering a 4-person 3-bedroom beach villa free vacation package for 7 days (excluding airfare), including airport pick-up, accommodation and unlimited free tickets to Vinpearl’s VAP, Safari, Vinpearl golf. The voucher can only be activated after the customer signs the VinFast electric vehicle purchase contract, and the voucher is valid for 2 years.

The Links:   G150XG03-V3 SKKD46-12