一種單端反激同步整流防倒灌驅(qū)動電路設(shè)計(jì)

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摘 要： 通過分析單端反激同步整流電路中倒灌電流形成原因，提出一種他驅(qū)式同步整流驅(qū)動電路設(shè)計(jì)方案。經(jīng)過理論計(jì)算和仿真分析，驗(yàn)證所提方案的可行性。搭建1臺輸出5 V/12 A的二次電源模塊樣機(jī)，經(jīng)試驗(yàn)實(shí)測，結(jié)果表明樣機(jī)可以實(shí)現(xiàn)對倒灌電流的定量控制。

關(guān)鍵詞： 單端反激; 同步整流; 倒灌電流; 電源模塊

中圖分類號： TM46

文獻(xiàn)標(biāo)志碼： A

文章編號： 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

低壓中小功率二次DC/DC電源模塊一般選用單端反激作為開關(guān)電源拓?fù)洌槍Φ蛪捍箅娏髫?fù)載的應(yīng)用場景，需要著重提升模塊的轉(zhuǎn)換效率。（剩余5106字）