基于STM32的开关电源模块并联供电系统  

STM32-based Switching Power Supply Module Parallel Power Supply System

作　　者：厉俊 郑佳蕙 LI Jun;ZHENG Jiahui(School of Information,Zhejiang Sci-Tech University,Hangzhou 310018,China)

机构地区：[1]浙江理工大学信息学院

出　　处：《软件工程》2020年第3期4-8,共5页Software Engineering

摘　　要：本设计以STM32单片机为主控元件产生PWM脉冲,双向DC/DC电路为核心电路,利用以IR2103芯片为主的驱动电路控制双向DC/DC电路中场效应管的开关。电路采用闭环反馈控制,高精度的INA282作为采样电路核心芯片输出反馈信号,单片机根据反馈信号对PWM做出调整,对并联供电系统的输出电流电压进行稳定的步进调整,从而实现稳压输出及电流的不同比例分配。该系统的输出误差和负载调整率低,具有过流保护功能,经测试系统能输出稳定直流电压8V,电流误差绝对值小于2%,供电效率达到70%以上。In this design,the STM32 MCU is used as the main control component to generate the PWM pulse.The bidirectional DC/DC circuit is the core circuit.The drive circuit based on the IR2103 chip is used to control the switch of the FET in the bidirectional DC/DC circuit.The circuit adopts closed-loop feedback control.The high-precision INA282 is used as the sampling circuit core chip to output the feedback signal.The MCU adjusts the PWM according to the feedback signal,and performs stable step adjustment on the output current and voltage of the parallel power supply system to achieve the regulated output and distribute different proportions of current.The system has low output error,low load regulation,and an overcurrent protection function.The tested system can output a stable DC voltage of 8V.The absolute value of the current error is less than 2%.The power supply efficiency is over 70%.

关 键 词：STM32单片机 开关电源 并联供电 过流保护 比例分配 

分 类 号：TP242[自动化与计算机技术—检测技术与自动化装置]