Archive 12/31/2021

Digi-Key will sponsor seven Microchip Technology Elite Annual Meeting events

Digi-Key Electronics, a global Electronic component distributor, announced that it will sponsor seven Microchip Technology Elite Annual Meetings (MASTER) events to be held in November and December. They will be the gold sponsors of all three annual meetings in Mainland China and India Annual Meetings. The silver sponsor of the conference, the platinum sponsor of the Korean annual conference, and the silver sponsor of the two annual conferences in Taiwan.

David Stein, Vice President of Global Supplier Management at Digi-Key, said: “We are very pleased to be able to support Microchip MASTER, a top-level technical training conference. The annual technical elite conference will consistently provide system design engineers of all levels with the information they need. And hands-on training to help them broaden their knowledge and technical fields, and promote their products to market faster. The mission of the Microchip Technology Elite Annual Meeting is highly consistent with Digi-Key’s values ​​and mission, and we are honored to participate in these activities.”

Microchip Technology Elite Annual Meeting is held every year to provide services to embedded control engineers around the world. The training courses cover a wide range of topics and are taught by Microchip’s application and design engineers.

Ken Pye, Vice President of Microchip Global Applications, pointed out: “For a long time, attendees have agreed that the Microchip Technology Elite Annual Conference is the industry’s top technical training event. Thanks to Digi-Key for the sponsorship, we share many common customers with Digi-Key. With their help, these customers learned how to make their final products stand out in many different markets.”

Digi-Key Electronics will sponsor the following events:

·Seoul, South Korea – November 5-8, 2019 (Platinum Sponsor)

·Wuhan, China – November 6-8, 2019 (Gold Sponsor)

·Shenzhen, China – November 13-15, 2019 (Gold Sponsor)

·Taipei, Taiwan – November 14-15, 2019 (Silver sponsor)

·Shanghai, China – November 20-22, 2019 (Gold Sponsor)

·Taichung, Taiwan – November 28-29, 2019 (Silver sponsor)

·Bangalore, India – December 3-6, 2019 (Silver sponsor)

For more information on Microchip products, resources, and available quantities, please visit the Digi-Key global website.

  About Digi-Key Electronics

Digi-Key Electronics is a global authorized distributor of electronic components integrated services, headquartered in Thief River Falls, Minnesota, USA, and distributes more than 9 million products from more than 800 high-quality brand manufacturers. More than 1.7 million of them are available from stock and shipped immediately. Digi-Key also provides a variety of online resources, such as EDA and design tools, specifications, reference designs, teaching articles and videos, multimedia library, etc. Provide 24/7 technical support via email, phone and online customer service. For additional information or to inquire about Digi-Key’s extensive product range, please visit www.digikey.cn.

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Realization of Released Control Scheme of Car Door Based on Fieldbus Technology

With the emergence of various sensors and the rapid development of chip technology, the safety and intelligence of automobiles are increasing day by day. The functions of automobile Electronic control units (ECU) and the information interaction between ECUs are increasing. Automobile manufacturers have developed a variety of Bus technology provides reliable and low-cost connections, realizes corresponding network structure according to different requirements of safety and intelligence, and satisfies the data exchange of different requirements between units.

With the emergence of various sensors and the rapid development of chip technology, the safety and intelligence of automobiles are increasing day by day. The functions of automobile electronic control units (ECU) and the information interaction between ECUs are increasing. Automobile manufacturers have developed a variety of Bus technology provides reliable and low-cost connections, realizes corresponding network structure according to different requirements of safety and intelligence, and satisfies the data exchange of different requirements between units. For the control of the door area, there are many functions to be achieved, including window lifting, rear-view mirror position adjustment, door lock switch, switch detection, etc., for different target customer groups, you can choose to implement smart solutions. More, including anti-pinch windows, folding and heating of rear-view mirrors, etc. The low-speed CAN bus and LIN bus are used to realize the door distributed control system, which selectively realizes some intelligence. The system can be quickly modified and upgraded at the same time. No major design changes are required. This article describes the determination of the system structure and the specific realization of distributed control.

System structure determination

The door control system adopts a bus topology structure. The bus generally uses a low-speed CAN bus or a LIN bus. Different bus protocols and different topology structures can provide different degrees of intelligence. The first scheme is to use a centralized control CAN node for each door, and the BSI and the four doors are connected through a CAN network, as shown in Figure 1.

Realization of Released Control Scheme of Car Door Based on Fieldbus Technology
Figure 1 Centralized door control scheme

The second scheme is that each door adopts a distributed LIN network structure, and each function is made into a separate node, that is, a separate rearview mirror control node, a window control node, a door lock control node, a switch input control node, and the switch The input control node can be the master node of LIN at the same time, the master node of each door is the CAN-LIN gateway node at the same time, and the BSI and the four doors are connected through the CAN network. as shown in picture 2.

Realization of Released Control Scheme of Car Door Based on Fieldbus Technology
Figure 2 Distributed control scheme of car doors

Solution 1 is a typical solution adopted by a large number of manufacturers. This centralized control method integrates the window lift and anti-pinch, the position adjustment of the rearview mirror, the door lock, and the switch input detection into one ECU, which is more costly. Low, using low-speed CAN bus connection, simple topology structure, simple and real-time communication, relatively simple protocol formulation, and CAN adopts multi-master dual-wire fault-tolerant mechanism, so the safety is high, and the diagnosis based on CAN bus also makes fault finding and Maintenance is more convenient.

With the development of technology and consumers’ pursuit of automobile intelligence, the improvement of automobile intelligence and rapid upgrading are key factors to ensure the competitiveness of automobile manufacturers. The shortcomings of using a single CAN bus for centralized control have also begun to be exposed. Since the high-performance MCU in the door node directly controls the windows and mirrors, when the ECU’s intelligence requirements are getting higher and higher, and it is necessary to add functions or intelligence, only the MCU functions of each centralized control node can be enhanced, resulting in an increase in MCU specifications ; And the centralized control installation is complicated, there are many connectors and connecting cables, when the intelligence increases, the number of interconnections increases, lacking flexibility, product upgrades require a lot of costs, and ultimately lead to a decrease in efficiency.

The hierarchical network is an effective solution to solve the low-cost and rapid upgrade of automotive products. As an effective supplement to the CAN bus, the LIN bus is a key factor in the feature upgrade and function enhancement of the hierarchical automotive network. Use the CAN-LIN shown in Option 2. The hierarchical network structure takes full advantage of the respective advantages of the CAN/LIN bus, transplants some functions to smaller and more reliable nodes, reduces the complexity of each ECU, and each LIN node in the four doors can be used in common. Better interchangeability and compatibility, a node can be added or removed at any time according to the configuration requirements of the door function, without any impact on the entire network, so that it can be upgraded quickly without incurring greater costs Consumption.

The emergence of single-chip sensors and actuators provides a low-cost solution for distributed nodes, and makes it possible to adopt distributed technology to reduce costs. With the continuous maturity of LIN bus technology, a more powerful and flexible distributed system can be obtained by appropriate selection of MCU and LIN state machine.

Realization of distributed control

In the implementation of the distributed control of the door system, each door is a LIN network. The front door includes a window node, a rearview mirror node and a door lock node, and the rear door does not include a rearview mirror node. The following is from the distributed node Discuss the realization of the car door distributed control system in two aspects: realization and realization of the gateway.

Rearview mirror node

The rearview mirror node scheme is shown in the figure below. It realizes the position adjustment of the rearview mirror up and down, front and back, and realizes the folding function and heating function. It is realized by Freescale’s intelligent distributed control single chip MM908E625. MM908E625 is a height The integrated single-package solution integrates the HC08 core and SmartMOS analog control IC in a SOIC54 package. The analog control IC includes a LIN physical layer transceiver, a Voltage regulator, 4 half H-bridges and a high-end switch. The H-bridge realizes the drive of the rear-view mirror motor to realize position adjustment and folding, and uses the high-end switch to realize the rear-view mirror heating.

Realization of Released Control Scheme of Car Door Based on Fieldbus Technology
Figure 3 Rearview mirror node scheme

Car window node

The window node scheme is shown in the figure below. To realize the window lifting and anti-pinch, the intelligent power drive chip with current feedback is adopted, and the small algorithm based on current feedback is designed to realize the anti-pinch function. When the window motor is started, it can run smoothly after 100 milliseconds. After this starting time, the current feedback value of the drive chip is sampled, and the ADC sampling in the MCU on the window ECU is compared with the threshold value. When there is an obstacle, the operating current of the window motor increases, and the ADC sampling value exceeds the set threshold. At this time, it is considered that the obstacle is encountered, and the MCU controls the drive chip to stop driving the window motor, thereby realizing the anti-pinch.

Realization of Released Control Scheme of Car Door Based on Fieldbus Technology
Figure 4 Car window node scheme

Gateway

The master node of each door LIN network completes the detection of the switch status of the door area, controls all communications on the LIN network, designs a reasonable schedule to control the transmission of each information frame, and effectively controls the maximum transmission delay of key signals. This node is also a CAN-LIN gateway node, which completes the data buffering and information exchange between the CAN network and the LIN network.

Concluding remarks

This article comprehensively considers the advantages and disadvantages of different system structures and the requirements of intelligent and renewal of automotive products. The design and implementation of a CAN/LIN bus-based car door distributed control system has been implemented well and has a certain practical value.

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Everything you need to know about Wi-Fi HaLow

Wi-Fi HaLow will soon be used in cameras, door locks, shops, factories, and mobile devices near you. What is Wi-Fi HaLow? Why is this the best solution for the Internet of Things?

Wi-Fi HaLow will soon be used in cameras, door locks, shops, factories, and mobile devices near you. What is Wi-Fi HaLow? Why is this the best solution for the Internet of Things?

Author: Shahar Feldman, Vice President of Marketing, Morse Micro

Wi-Fi HaLow is the next generation of Wi-Fi. This technology not only extends the distance and battery life of Wi-Fi-connected devices, but also represents the exciting future of people and devices connected wirelessly through the Internet of Things. Wi-Fi HaLow has a wide range of applications, from sensors, actuators and security cameras to home automation, home appliances and thermostats, all of which can improve user experience and productivity while reducing installation and operating costs.

Wi-Fi HaLow technology was recently standardized by the IEEE 802.11ah working group and named by the Wi-Fi Alliance (WFA). Wi-Fi HaLow operates on unlicensed RF frequency bands below 1 GHz, and provides data rates ranging from hundreds of kilobits per second to tens of megabits per second, and span distances from tens of meters to one kilometer. Wi-Fi HaLow satisfies the scalability, robustness and security requirements required to deal with the most challenging IoT environments.

Although traditional Wi-Fi is the most widely used wireless communication protocol today, the rapid development of the Internet of Things forces people to rethink Wi-Fi, revealing technological gaps, and the need for Wi-Fi in an all-encompassing interconnected world What role to play. Many applications of the Internet of Things and the M2M protocol (machine-to-machine), with higher requirements for remote connections and low power consumption, are leading the popularity of Wi-Fi HaLow this year and the next few years.

Everything you need to know about Wi-Fi HaLow

Figure 1: Wi-Fi spans multiple frequency bands to meet various connection challenges
(Source: Wi-Fi HaLow: Expanding Wi-Fi for IoT applications, Wi-Fi Alliance white paper)

Traditional Wi-Fi and Wi-Fi HaLow

In the near future, traditional Wi-Fi will allow users to use wide channels in the 2.4GHz, 5GHz and even 6GHz frequency bands to quickly play movies and download files. The effective distance of these connections is very short, and the speed of consuming the battery is very fast, the device needs to be charged frequently or use the power connection. For example, Wi-Fi 6 is still ideal for bandwidth-intensive applications such as 4K video streaming and augmented reality.

Wi-Fi HaLow is built on the basis of strong security and spectrum-efficient OFDM. At the same time, it uses a narrow radio channel below 1GHz, which can better penetrate the material and allow the connection to reach 10 times the distance of traditional Wi-Fi, 100 Times the area and 1,000 times the capacity. Wi-Fi-HaLow is the perfect choice for IoT devices, because it allows a powerful connection of more than 8,000 devices on a single access point, and can use the newly added sleep mode to save power. Wi-Fi-HaLow realizes a new product category that can run on batteries for many years and still provides data throughput of tens of Mbps.

Traditional Wi-Fi’s network congestion, distance limitation, high power consumption, and the limited number of devices that can be connected to a single wireless access point are no longer feasible in the interconnected world of smart devices. These limitations hinder the emergence of new IoT-centric business models across industries that require greater capacity, wider range, and better battery life, while also minimizing deployment costs and time. All of these are very desirable features of Wi-Fi HaLow.

Features

Wi-Fi 4/5/6

(IEEE 802.11n/ac/ax)

Wi-Fi HaLow

(IEEE 802.11ah)

Operating frequency band

2.4 GHz, 5 GHz, 6 GHz

Below 1 GHz

(902 C 928 MHz in the U.S.)

Channel bandwidth options

20, 40, 80, 160 MHz

1, 2, 4, 8, (16 is optional) MHz

Maximum addressable device per access point

2007

8191

Single stream MCS data rate range

6.5 Mbps-150 Mbps

(.11n, Wi-Fi 4)

150 Kbps C 86.7 Mbps

Regular range

~100 m

10 times further

100 times wider

1000 times larger

Compared with 802.11n 20MHz

Table 1: Comparison of Wi-Fi 4/5/6 and Wi-Fi HaLow

IoT solutions based on IEEE 802.11ah Wi-Fi standard

Wi-Fi HaLow enhances the wireless local area network (LAN) to support today’s most challenging IoT system requirements.In ultra-low power consumption, ultra-low throughput and low energy efficiency LoRa and Sigfox low-power wide area network (LPWAN), lower throughput, shorter distance personal area network (PAN) (such as Bluetooth/BT5) and more power consumption Between LTE Cat-M/Narrowband IoT, Wi-Fi HaLow has a place

Although previous technological gaps have led to sub-optimal proprietary solutions to meet market needs, the new reality is that these gaps have now been corrected under the protection of the IEEE 802.11 standard: system integrators can take advantage of traditional Wi-Fi The same hardware and software assets developed by Fi Radio enjoy multi-vendor products and benefit from the Wi-Fi Alliance’s interoperability testing and certification program. Users no longer need to compromise on range, throughput, power consumption, network capacity, complex mesh network settings, or monthly data charges. As part of the IEEE 802.11 enterprise-level security standard, security is in the first place: Wi-Fi-HaLow uses the latest WPA3 security standard, encrypted messages and unique chip ID technology to achieve a secure boot. The high data rate enables secure wireless firmware upgrades, and supports UDP and TCP/IP protocols. Native IP support means no bridge or gateway is required.

Wi-Fi HaLow use cases

In the initial stage of deployment, Wi-Fi HaLow is expected to be used for indoor and outdoor applications that are not reachable by standard Wi-Fi, such as battery-powered surveillance systems, wireless cameras, and smart home doorbells. Another typical use case is a large site. A HaLow access point can connect thousands of devices, covering 1,000 times the capacity of traditional Wi-Fi, bypassing complex, limited bandwidth and unreliable mesh networks, thus simplifying installation And reduce the total cost. Examples of this can be found in large buildings, warehouses, offices, campuses, shopping malls, and sports venues through access control systems (temperature monitors, mask monitors, room occupancy restrictions, and pedestrian-based object cleaning/disinfection functions-all These are all added together) the advanced connection, it is convenient to configure the camera and sensor to enhance the safety and health of the occupants. Many other fields such as industrial automation, process control sensors, building automation, logistics and asset management, agriculture and environmental sensors, mining, clean energy farms, Electronic signs and retail stores, all require this technology, so that all equipment is increasingly automated Stay connected in your world. In fact, Wi-Fi HaLow stands out because of its diversity of functions.

Products with Wi-Fi HaLow will provide new options for unlicensed frequency bands that support both IP networks and the well-known OFDM modulation mode in the PC ecosystem. In addition, more and more people support the prediction that in the long run, Wi-Fi HaLow will expand the connection range of mobile devices and personal computers as part of the emergence of the fourth frequency band and support for emerging use cases.

Wi-Fi HaLow is ready to go

HaLow’s innovation is receiving attention. For example, Morse Micro is investing heavily to transform into the HaLow market with its smallest system-on-chip and module solutions. The Wi-Fi Alliance has announced a HaLow certification program, which will be launched in 2021. Many large companies are interested in using Wi-Fi-HaLow silicon chips in new products. Wi-Fi-HaLow is gaining momentum. All features stand out, and alternatives are beginning to lose their brilliance, especially in the field of Internet of Things. The market application of Wi-Fi HaLow will definitely reshape Wi-Fi itself. Therefore, the Wi-Fi that people see will never be the same as before.

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Leading the world for 10 years?China’s industrial robots make a big breakthrough, and German engineers come to watch

As a globally recognized world factory, how powerful is China’s manufacturing industry? As the world is beginning to face a shortage of labor, many countries are also vigorously developing industrial robots, especially Japan, which has maintained a leading position in this field for a long time, but now this situation has been broken by China, and some experts even assert that, China’s industrial robots have been leading the world for 10 years, is it true? It turns out that with the unremitting efforts of domestic scientific and technological workers, China’s industrial robots have made major breakthroughs. Even German engineers have chosen to visit them and they have to lament China’s strength.

Since Ford in the United States invented the assembly line, workers have often performed repetitive and boring tasks on the assembly line. In this case, can robots be used to replace labor to complete these repetitive tasks? Japan, which has unique advantages in precision parts processing and the electronics industry, was the first to seize this opportunity and rely on its own strong scientific research capabilities to master industrial robot technology in the 1980s and soon monopolized the market. Since then, industrial robots have been the pride of Japanese manufacturing.

Although other countries can also develop their own industrial robots, they cannot compete with Japanese products in terms of performance, because industrial robots are definitely not simple mechanical arms. There are a large number of complex parts and Electronic equipment inside. The most critical part to achieve control is called the RV reducer. Although it appears to be just a component composed of bearings, it has a vital impact on the rotation accuracy of industrial robots and can also prevent industrial The robot is overloaded.

After long-term efforts, China finally mastered its own RV reducer technology, so why does China have to break through this technical barrier? Because it is imported from Japan, the price of the reducer is expensive, and it is entirely up to Japanese companies to decide when to deliver and how much to provide. This is not conducive to the development of China’s manufacturing industry. You must know that China and Japan are actually There is a competitive relationship. As the upstream industry of the manufacturing industry, if industrial robots are only in the hands of Japan, then China will be completely passive. In this context, no matter how difficult it is for industrial robots to break through, China must also master this technology.

In fact, industrial robots have appeared not only in factories, but also in space, such as the robotic arm of the space station. China Tiangong Space Station has unveiled a special robotic arm that can help astronauts complete many tasks, such as outside the cabin. The installation of equipment, space garbage cleaning, etc., to be able to move industrial robots into space is enough to see China’s strength in this field, and make the world truly realize that China is the real technological power.

As far as China is concerned, industrial robots can be said to be very timely, because the country has already proposed China’s 2025 plan to transform from a manufacturing country to a creative power. With industrial robots, the labor force can be effectively liberated and more talents can be used. Going to their corresponding positions, on the other hand, has also effectively alleviated the outflow of domestic manufacturing labor, and can play an irreplaceable role in reducing labor costs and providing product quality for manufacturing enterprises.

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What is the HTC blockchain phone? What does the HTC blockchain phone look like?

Recently, HTC released the latest blockchain phone Exodus 1s, which is the successor to Exodus 1. It can double as a hardware ledger, and the new phone has other encryption techniques.

In terms of hardware, as a mobile phone in 2019, Exodus 1s has a mediocre performance. The phone is equipped with Snapdragon 435 chipset and 4GB RAM, uses a 5.7-inch 18:9 HD + Display, 64GB of storage space (with SD card slot), the phone still uses a microUSB port, there is a 3.5 mm Audio jack.

It is reported that the attraction of Exodus 1s is that it can run a complete Bitcoin node on a mobile phone, which means that the mobile phone can store the entire Bitcoin ledger in it, but at least 260GB of storage space is required because of the current Bitcoin ledger. There are about 260GB, and it is growing at a rate of about 60GB per year.

In 2018, HTC focused on blockchain mobile phones and launched the Exodus 1 mobile phone. Its biggest feature is its support for digital wallets, which sold for more than US$1,100 (0.15 Bitcoin) at the time. Now HTC has launched the Exodus 1s mobile phone, the price is as low as 244 US dollars, but users need to be equipped with a 400GB memory card in order to store the Bitcoin blockchain.

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High-energy-efficiency, high-precision, high-reliability dimmable LED lighting step-down solution based on NCL35076 or NCL30076

This article mainly introduces Onsemi’s 75 W solution based on NCL35076 continuous conduction mode (CCM) DC-DC step-down controller and 100 W and 240 W solutions based on NCL30076 quasi-resonant (QR) step-down controller. Typical applications of the two solutions are LED lighting systems, analog/PWM dimmable LED drivers, with a wide analog dimming range from 1% to 100%.

This article mainly introduces Onsemi’s 75 W solution based on NCL35076 continuous conduction mode (CCM) DC-DC step-down controller and 100 W and 240 W solutions based on NCL30076 quasi-resonant (QR) step-down controller. Typical applications of the two solutions are LED lighting systems, analog/PWM dimmable LED drivers, with a wide analog dimming range from 1% to 100%.

ON semiconductor’s proprietary LED current calculation technology and the zero input Voltage offset of the internal detection and feedback amplifier can perform accurate current stabilization within the entire analog dimming range, and the current stabilization accuracy is at full load.

High-energy-efficiency, high-precision, high-reliability dimmable LED lighting step-down solution based on NCL35076 or NCL30076
Figure 1: Typical application circuit diagram of NCL35076 CCM 75 W solution

The NCL30076 QR 240 W solution shown in Figure 2 uses ON Semiconductor’s NCL2801CDA PFC driver, NCL30076 step-down driver, NCP10671 switch driver and a dimming signal controller. NCL2801CDA is a current-mode CrM boost PFC controller that utilizes ON Semiconductor’s total harmonic distortion (THD) enhancement technology to provide best-in-class THD performance over a wider operating range. The Valley Counting Frequency Foldback (VCFF) method optimizes energy efficiency and standby power consumption. NCP10671 integrates a fixed frequency current mode controller and 700 V MOSFET, with high integration, including soft start, frequency jitter, short circuit protection, cycle skipping, slope compensation and dynamic self-power (without auxiliary winding). During nominal load operation, NCP10671 switches at one of the available frequencies (60 or 100 kHz). When the output power demand decreases, the IC will automatically enter the skip cycle mode to reduce standby power consumption. Protection functions include: a timer to detect overload or short-circuit events, and over-voltage protection with automatic recovery. NCP10671 has optimized standby performance, connects auxiliary winding or supplies power to IC from output, stops DSS work, and helps reduce input power consumption at high voltage to below 15 mW.

High-energy-efficiency, high-precision, high-reliability dimmable LED lighting step-down solution based on NCL35076 or NCL30076
Figure 2: Typical application block diagram of NCL2801 + NCL30076 QR 240 W solution

Accurate steady flow and wide analog dimming

In addition, the steady current accuracy and simulated dimming range test conditions and results of the NCL35076 CCM 75 W evaluation board and NCL30076 QR 100 W evaluation board are as follows:

NCL35076 CCM 75 W evaluation board:

VOUT (50/30/10 V), the inductance value is typically ±20%, the temperature (-10/25/90 ºC), 27 dimming curves have been tested, and the steady current accuracy is ± 1.5% at full load. ±10% at 1% load, analog dimming range NCL30076 QR 100 W evaluation board:

VOUT (300/200/100 V), the inductance value is typically ±15%, the temperature (-10/25/90 ºC), 27 dimming curves have been tested, and the steady current accuracy is ± 2% at full load. ±14% at 1% load, simulated dimming range energy efficiency test

The test conditions and energy efficiency curve of the evaluation board are as follows. The energy efficiency of the NCL35076 CCM 75 W evaluation board at 10 V, 30 V, and 50 V can be as high as 92%, 96%, or more than 98%. The energy efficiency of the NCL30076 QR 100 W evaluation board at 100 V, 200 V, and 300 V can exceed 96, respectively. %, 97% and close to 98%.

High-energy-efficiency, high-precision, high-reliability dimmable LED lighting step-down solution based on NCL35076 or NCL30076

High-energy-efficiency, high-precision, high-reliability dimmable LED lighting step-down solution based on NCL35076 or NCL30076
Figure 3: Energy efficiency test curve of the evaluation board

Thermal performance test

We tested the input voltage Vin 60 V, Vout 50 V, Iout 1.5 A, and the NCL35076 CCM 75 W evaluation board showed good thermal performance when it worked for 30 minutes. The input voltage Vin 400 V, Vout 300 V, Iout 0333 A, NCL30076 QR 100 W evaluation board also showed good thermal performance when it worked for 30 minutes.

Summarize

ON Semiconductor’s NCL35076 or NCL30076-based dimmable LED lighting step-down solution has the advantages of high energy efficiency, high precision, and high reliability, with an analog dimming range as low as 1%, proprietary LED current calculation technology and internal detection and feedback The zero input voltage offset of the amplifier makes the current stabilization accuracy at full load

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Zhanrui Consumer Electronics: Released a new strategy of “one specialization, multiple abilities” and insisted on the common development of 5G+4G

The consumer electronics industry is a typical technology-driven industry. With the rapid development of technologies such as 5G, artificial intelligence, and the Internet of Things, the consumer electronics industry is gradually entering a new stage of development. On September 16, at the “UP·2021 Zhanrui Online Ecological Summit”, Zhou Chen, Executive Vice President of Zhanrui and General Manager of the Consumer Electronics Division, shared the achievements of Zhanrui Consumer Electronics in the past year and the latest development of 5G products. And released a new strategy of “one expertise, multiple capabilities” to gather more ecological partners to explore the “infinite possibilities” of consumer electronics.

Leapfrog growth in consumer electronics business revenue


In the past year, Zhan Rui has made great progress in the field of consumer electronics. The product coverage is wider, the product portfolio is more complete, the product terminal is more abundant, and it has begun to gain the recognition of global famous brands such as Honor and Realme. Thanks to stronger product competitiveness and a better customer base, Zhanrui Consumer Electronics 4G+5G business revenue has achieved leaps and bounds year after year. In the face of the epidemic and tight supply, the growth rate will reach 59% in 2020, and the overall growth rate will reach 137% in 2021. It is expected to maintain a strong growth of 100% next year.

Zhanrui Consumer Electronics: Released a new strategy of “one specialization, multiple abilities” and insisted on the common development of 5G+4G

Data from market research institutions also corroborated this point. In the latest Q2 2021, Counterpoint’s global smartphone application processor market tracking report, Zhan Rui’s market share of smartphone chips reached 8.4%. Zhou Chen said that with the further development of Zhanrui’s consumer electronics business, it is expected that the global market share will soon exceed double digits.

Adhere to the 5G+4G product strategy


This year, Zhanrui officially launched a new brand of 5G chips “Tangula”, and released a full range of Tangula 6, 7, 8, 9 products for different user needs. At present, more than 50 terminal brands equipped with Zhanrui’s 5G chip have been launched, and the 6nm 5G chip that has received much attention has also made new progress.

Zhanrui Consumer Electronics: Released a new strategy of “one specialization, multiple abilities” and insisted on the common development of 5G+4G

At the meeting, Zhou Chen showed the performance of Zhanrui Tangula 6nm 5G chip over 400,000 points, showing Zhanrui’s strength in 5G. At the same time, Zhou Chen also revealed that a variety of branded customer terminals equipped with Zhanrui’s 6nm 5G chip have now entered the stage of mass production and debugging and will soon be available. Zhanrui is constantly working hard to make these products meet with you as soon as possible and bring a value-for-money experience.

While making progress in 5G products, Zhanrui is also adhering to the innovation of 4G products. In the 4G field, Zhanrui products have achieved coverage from entry-level, mid-end to high-end, and have broken through the brand’s flagship models, with a clearer queue. Zhan Rui believes that for a relatively long period of time in the future, the consumer electronics market will still be a situation where 5G and 4G demand coexist.

Zhanrui Consumer Electronics: Released a new strategy of “one specialization, multiple abilities” and insisted on the common development of 5G+4G

Zhou Chen pointed out that with the development of network technology, the role of the basic network assumed by 2G networks will gradually be transferred to 4G, which means that 4G networks will still have great market demand in the future. “A good 4G network will continue to exist as a basic data network for a long time and play an important basic network role.” Therefore, Zhanrui Consumer Electronics will continue to adhere to the 5G+4G product strategy to cover the global market. The needs of different regions and different groups of people bring better mobile internet experience to more consumers around the world.

New Strategy of “One Specialty, Many Capabilities”


Faced with the new goal and vision, Zhanrui’s consumer electronics business will begin to build a new strategy of “one specialization, multiple capabilities”. Zhanrui’s “one specialization and multiple abilities” refers to focusing on smart phone business as the main product form, technology, ecology and supply capacity, continuous innovation, creating a more open ecological platform for more product forms, and enabling more Many partners are fully displaying their abilities and creativity on the stage of intelligent life, so as to bring more intelligent and convenient life experience to consumers.

Zhanrui Consumer Electronics: Released a new strategy of “one specialization, multiple abilities” and insisted on the common development of 5G+4G

Among them, the construction of ecology is the top priority, including software ecology and hardware ecology. In terms of software ecology, Zhanrui will continue to deepen the optimization of smart OS, and at the same time, it will introduce the development of RTOS ecology for lightweight devices, and introduce more players to form a richer system ecology. In the hardware field, Zhan Rui will open up the capabilities of the chip platform, including communications, computing, and AI capabilities, to carry more product forms and categories with industry-leading technology.

“One specializes in multiple functions, focuses on innovation, and enables the future.” Zhanrui’s new strategy for consumer electronics business also brings together many ecological partners. At this conference, Liangfengtai and Zhanrui jointly released the 5G AR smart glasses HiAR H100, which is customized for industrial application scenarios. It is an innovative device for 5G industry applications, making “visible” industrial scenes and “invisible” The digital world is better integrated to achieve more efficient production and work.

Zhanrui Consumer Electronics: Released a new strategy of “one specialization, multiple abilities” and insisted on the common development of 5G+4G

Intelligent life is inseparable from rich and diverse intelligent terminals. In the future, Zhanrui will adhere to the new strategy of “one expertise, multiple abilities”, and join hands with more like-minded partners to continuously explore the infinite possibilities of consumer electronics smart products, serve the intelligent needs of every consumer, and jointly create a better future life. .

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Use DLP Pico products to design smaller mobile projection and display applications

Consumers now expect brighter and larger displays for mobile, portable, and household products. But high brightness and high resolution usually mean more power consumption and more bulky products.

Consumers now expect brighter and larger displays for mobile, portable, and household products. But high brightness and high resolution usually mean more power consumption and more bulky products.

The new TI DLP®Pico™ 0.23-inch chipset can realize smaller, lower power consumption portable Display products with high definition (HD) and full high definition (FHD) resolutions. The DLP Pico 0.23-inch chipset can support a variety of next-generation ultra-portable Display products, such as smart home displays, mobile phone accessories Pico projectors, smart speakers with displays, augmented reality and virtual reality wearable devices, and mobile smart TVs.

The smallest chipset to achieve highlight

When designing a small product, you don’t want the display resolution or brightness to be affected. Higher brightness helps achieve clearer high-definition images, larger projection displays, and better visibility under various lighting conditions (including bright ambient light). Since the DLP Pico 0.23-inch series includes our smallest full HD display chipset to date, you can create ultra-low power mobile pico projectors that can fit in a shirt pocket. The brightness efficiency can support up to 200 lumens of brightness to achieve a display from 20 inches to 40 inches, and its overall dimensions are only 78mm x 78mm x 15mm (100 lumens). Figure 1 shows an example of a projection display in a portable smart speaker.

Use DLP Pico products to design smaller mobile projection and display applicationsFigure 1: Smart speaker with display projection

Low-power components extend battery life

Have you ever experienced a situation where the projector shuts down while watching a movie? DLP TRP5.4μm reflection technology enables high-efficiency projection applications and extends the battery life of mobile projectors. DLP products do not require polarization, so you can focus all the light source energy to achieve a brighter display. TRP technology includes DLP IntelliBright™ image processing algorithm suite, which allows you to reduce the power consumption of the device by 50% or increase the brightness by 50%. The power consumption of the display driver and digital micromirror chip (DMD) is less than 240 milliwatts.

Realize HD and qHD display

DLP230NP is the smallest chipset on the market that can achieve full HD display. DLP230GP allows you to design a chipset with the same size as HD products at a lower price, but with qHD (960X540) resolution.

The following table summarizes the products of the .23-inch chipset:

Resolution

Digital Micromirror Chip (DMD)

Display driver

qHD (960X540)

DLP230GP

DLPC3432

HD (1280X720)

DLP230KP

DLPC3434

FHD (1920×1080)

DLP230NP

DLPC3436

Table 1: DLP Pico qHD, HD and FHD chipsets, including DMD and drivers

These chipsets are paired with power management chips (PMICs) to simplify and integrate all power management required for DMD, display drivers, and LEDs. Three PMICs provide various LED maximum current drive performance: DLPA2000 (0.75A), DLPA2005, (2.4A) and DLPA3000 (6A)

You only need one that supports up to 24-bit RGB parallel video interface and I2C processor to drive and control the DLP Pico display. Both display drivers have image optimization advantages, such as 1-D keystone correction, active power management processing and color coordinate adjustment, which can simplify your display design work. Start designing with our high-resolution DMD immediately.

The Links:   NL8060BC2635E https://www.slw-ele.com/lp121sl-v1-0.html“> LP121SL V1.0

Increase the output current of the very low dropout voltage regulator and realize the parallel design of uniform heat dissipation

Introduction

Each new generation of computing system always requires higher total power and lower power supply Voltage than the previous generation products, so that power supply designers face the problem of maintaining higher output current in a smaller area. Under conditions of high power density and low output voltage, heat dissipation becomes the primary design consideration, especially for linear regulators in low-noise applications. Parallel LDO regulators can increase supply current and reduce heat dissipation, thereby reducing the temperature rise of any specific component and the size and number of heat sink components required.

This article explains how to connect a 3 A LT3033 very low dropout voltage regulator (VLDO) in parallel to generate more than 3 A current and improve heat dissipation. Utilizing the built-in output current monitoring function of LT3033 can simplify the design of parallel circuit and realize current sharing.

The input voltage range of the LT3033 is 1.14 V to 10 V, the output voltage can be as low as 0.2 V, and the load current can reach 3 A. The pressure difference at full load is only 95 mV. The quiescent current is 1.8 mA during operation and drops to 22 μA during shutdown. The current limiting function and thermal protection that can be set by the user make it robust for high current and low voltage applications.

Reference design: 3 A, single VLDO application

Figure 1 shows that the LT3033 provides a 0.9V, 3A output through a 1.2V input power supply. The IN and OUT pins require very low ESR ceramic capacitors of at least 10 μF to maintain stability. Adding a feedforward capacitor (CFF) between the VOUT and ADJ pins can improve transient response and reduce output voltage noise. Setting a 10 nF bypass capacitor between the REF/BYP pin and GND can usually reduce the output voltage noise to 60 μV rms in a bandwidth of 10 Hz to 100 kHz and soft-start the reference voltage source. The minimum input voltage required for regulation is equal to the regulation output voltage VOUT plus the differential pressure or 1.14 V, whichever is greater. The demo board is shown in Figure 2.

Increase the output current of the very low dropout voltage regulator and realize the parallel design of uniform heat dissipation

Figure 1. Typical application of LT3033.

Increase the output current of the very low dropout voltage regulator and realize the parallel design of uniform heat dissipation

Figure 2. LT3033 demo board.

Customers can set the current limit by connecting a resistor between the ILIM pin and GND, and the accuracy can reach ±12% in a wide temperature range. When the differential voltage between input and output exceeds 5 V, the internal current limit with foldback function will replace the external current limit.

The LT3033 realizes output current monitoring by measuring the resistance voltage from IMON to GND. The IMON pin is the collector of the PNP inside the chip. It mirrors the current of the LT3033 output PNP at a ratio of 1:2650. When the resistor voltage is not higher than VOUT–400 mV, it is proportional to the output current.

Increase the output current of the very low dropout voltage regulator and realize the parallel design of uniform heat dissipation

The output current monitoring function helps to realize the current sharing of multiple LT3033s.

Despite the small size of the LT3033, it still integrates many protection functions, including internal current limit with foldback function, thermal limit, reverse current and battery reverse connection protection.

Two LT3033s in parallel for 6 A applications

For applications requiring more than 3 A current, you can use its current monitoring function to connect multiple LT3033s in parallel. Figure 3 shows two LT3033 and two 2N3904 NPN devices in parallel to produce 1.5 V, 6 A output. The IN pin and OUT pin of each device are connected separately. An LT3033 acts as the master device, controlling another LT3033 slave device.

Combine the IMON pin with the NPN current mirror to create a simple amplifier. The amplifier injects current into the feedback voltage divider of the LT3033 slave device, forcing the IMON current of each LT3033 to be equal. The 100 Ω resistor can provide 113 mV emitter negative feedback under full load conditions to ensure good current mirror matching. The output voltage of the LT3033 slave device is set to 1.35 V, which is 10% lower than the circuit output to ensure that the LT3033 master device has the control right. The feedback resistance of the LT3033 slave device is split into multiple sections to ensure that sufficient margin is provided for the NPN of the slave device. A combination of a 10 nF capacitor and 5.1 kΩ resistor is added to the IMON pin of the slave device to compensate the frequency of the feedback loop.

Although the circuit can provide 6 A load current, the mismatch between the two NPN devices causes uneven heat distribution on the circuit board, which limits the current sharing accuracy. Using matched single-chip transistors (for example, Analog Devices’ MAT14) instead of two discrete NPN devices, higher current sharing accuracy can be obtained. MAT14 is a four-channel single-chip NPN transistor with excellent parameter matching performance. Its maximum current gain matching is 4%.

Figure 4 compares the corresponding output current of each LDO regulator when using discrete and matched NPN devices. Compared with 2N3904, the current mismatch rate of MAT14 current mirror has dropped from 5.3% to 1.6%.

Increase the output current of the very low dropout voltage regulator and realize the parallel design of uniform heat dissipation

Figure 3. Two LT3033s are connected in parallel.

Increase the output current of the very low dropout voltage regulator and realize the parallel design of uniform heat dissipation

Figure 4. By using matched MAT14 single-chip quad-channel transistors and parallel LDO regulators, the loss distribution is reduced.

Increase the output current of the very low dropout voltage regulator and realize the parallel design of uniform heat dissipation

Figure 5. Using MAT14, four LT3033 are connected in parallel.

Increase the output current of the very low dropout voltage regulator and realize the parallel design of uniform heat dissipation

Figure 6. Thermal performance of four LT3033s in parallel.

Use matching components to connect four LT3033s in parallel to achieve balanced current sharing and uniform heat dissipation

By expanding the current mirror and adding LT3033 slave devices, the parallel circuit architecture can be expanded as needed to use more LT3033. Figure 5 shows a current sharing solution using MAT14 and four LT3033 in parallel. The thermal performance is shown in Figure 6. The temperature of the four LT3033 ranges from 51°C to 58°C. Considering the voltage drop of each device along the input trace, the heat dissipation on the circuit board is even, indicating that the solution achieves a balanced current sharing. Figure 7 shows the transient response of a 12 A power supply operating at a 1.8 V input and providing a 1.5 V output.

Figure 7. Load transient response of four LT3033s connected in parallel.

in conclusion

The LT3033 is a 3A VLDO regulator in a 3 mm × 4 mm package. Its built-in output current monitoring function can be used for high current applications by connecting multiple LT3033 VLDO regulators in parallel. The typical differential pressure of the LT3033 under full load conditions is only 95 mV, which is very suitable for high current applications from low input voltage to low output voltage, and is equivalent to the electrical efficiency of a switching regulator. Other features include settable current limit, power good sign and thermal limit, which can provide a reliable and stable solution. Battery-powered systems can benefit from low quiescent current and reverse battery protection.

The Links:   G150XTN066 G150XNEL01 LCD-Display