Analog chips mainly include power management chips and signal chain chips. Among them, the power management chip is a chip that is responsible for the conversion, distribution, detection and other power management responsibilities of electric energy in the electronic equipment system. It is mainly divided into AC-DC AC-DC conversion, DC-DC DC and DC voltage conversion (applicable For large pressure difference), voltage regulator (for small pressure difference), AC and DC regulated power supply. Power management chips play different voltage and current management functions in different product applications, and different circuit designs need to be adopted for different downstream applications. At present, power management is developing in the direction of high speed, high gain, and high reliability. The development of power management chips is an important way to improve the skills of the whole machine. The signal chain chip is a chip used in the signal path from input to output in a system, including signal collection, amplification, transmission, processing and other functions.