The Design of High Efficient Battery Charging Circuit Based on STM32

摘要

In the paper, introduce a high efficient battery charging circuit based on STM32F407. In general, charging circuit module controls output voltage by PWM chips which outputs square wave, and includes negative feedback circuit which can stable output voltage and output current. The charging circuit module is simple, and efficient, but the defect is clear that is the pure hardware circuit, if the output current or voltage needs change, the hardware circuit must be redesigned that is very difficult and inconvenient. In the paper, supply PWM on STM32F407, so that can efficiently control current and voltage in different situation, and neednt redesign hardware circuit. At the same time, with synchronous rectification technology and soft switching technology can design a high efficient battery charging circuit.