| 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。 |
| 关键词: STM32单片机；开关电源；并联供电；过流保护；比例分配 |
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中图分类号: TP242
文献标识码: A
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| STM32-based Switching Power Supply Module Parallel Power Supply System |
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LI Jun, ZHENG Jiahui
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( School of Information, Zhejiang Sci-Tech University, Hangzhou 310018, China)
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| Abstract: 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%. |
| Keywords: STM32 single-chip microcomputer;switching power supply;parallel power supply;overcurrent protection;proportional distribution |
