“In recent years, with the continuous development of 5G, AI, biometrics and other technologies, cameras have also ushered in upgrade iterations. Whether it is clarity, intelligence, or application scenarios, they are constantly being strengthened and enriched, such as telemedicine, telecommuting, AI temperature measurement, non-contact recognition, and so on. For the camera, real-time clear image transmission is the basis of its operation, so the stability and clarity of the product have become important indicators.
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In recent years, with the continuous development of 5G, AI, biometrics and other technologies, cameras have also ushered in upgrade iterations. Whether it is clarity, intelligence, or application scenarios, they are constantly being strengthened and enriched, such as telemedicine, telecommuting, AI temperature measurement, non-contact recognition, and so on. For the camera, real-time clear image transmission is the basis of its operation, so the stability and clarity of the product have become important indicators.
Mobile phone camera power supply solution
Generally speaking, a camera hardware includes five parts: housing (motor), lens, infrared filter, image sensor and flexible printed circuit board. The image sensor is the core component of the camera, and its components are particularly susceptible to power interference, and power supply noise will affect the ability of the pixels to capture light normally, resulting in poor photo quality. Mobile phones are the most widely used mobile smart terminals. With the development of camera 3D sensing technology, mobile phone camera applications have been extended to scenarios such as biometrics, human-computer interaction, and AR experience. The growing demand for multiple cameras on mobile phones is even more for power supply. The design brought great challenges.
Figure 1 Wei’an LDO mobile phone camera power supply scheme
CMOS Image Sensor (image sensor) requires three power supplies (Core, Analog and I/O), of which 2.8V is the analog Voltage, 1.8V is the I/O digital voltage, and 1.2V is the core voltage. At this time, the CMOS Image Sensor is powered by the external low-dropout linear regulator (LDO) of Wei’an WR0332, which can disperse the heat concentrated in the IC, suppress the heat generation of the entire circuit, achieve high conversion efficiency, and help further Reduce the power consumption of the mobile phone camera module.Especially when applied to AVDD, excellent ripple rejection capability[email protected]
