一种单端反激同步整流防倒灌驱动电路设计

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摘 要： 通过分析单端反激同步整流电路中倒灌电流形成原因，提出一种他驱式同步整流驱动电路设计方案。经过理论计算和仿真分析，验证所提方案的可行性。搭建1台输出5 V/12 A的二次电源模块样机，经试验实测，结果表明样机可以实现对倒灌电流的定量控制。

关键词： 单端反激; 同步整流; 倒灌电流; 电源模块

中图分类号： TM46

文献标志码： A

文章编号： 2095-8188（2025）02-0053-05

DOI： 10.16628/j.cnki.2095-8188.2025.02.009

Design of Single-Ended Flyback Synchronous Rectification Anti-Reverse Current Drive Circuit

JIANG Dongyi， YANG Song， ZHANG Chunya

（The 24th Research Institute of China Electronics Technology Group Corporation， Chongqing 400060， China）

Abstract： By analyzing the causes of the reverse current in the single-ended flyback synchronous rectification circuit，a design scheme for the externally-driven synchronous rectification drive circuit is proposed.The feasibility of the proposed scheme is verified by the theoretical calculations and simulation analyses.A prototype of the secondary power supply module with the output of 5 V/12 A is built.The results of the experimental measurements show that the prototype can achieve the quantitative control of the reverse current.

Key words： single-ended flyback; synchronous rectification; reverse current; power module

0 引 言

低压中小功率二次DC/DC电源模块一般选用单端反激作为开关电源拓扑，针对低压大电流负载的应用场景，需要着重提升模块的转换效率。（剩余5106字）