Design of Synchronous Rectifier Digital Power Supply Based on STM32

Abstract

Introduced the basic principle of synchronous rectification in low voltage high current fields. Using digital control’s feature in switch power, a design scheme of SR digital Buck converter was put forward and analyzed the device choice. Designed all the circuit of the converter, designed and made a prototype. The experiment data were given including driving waveform and efficiency curve. One-cycle control strategy was made. To extend the using fields of the prototype, designed the intelligence communication interface. By means of experiment, the power supply has fast dynamic response and high precision and its efficiency can reach up to 95%.