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一种基于误差累积电路的自适应同步整流控制方案及其实现

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  • 国家科技期刊平台
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针对LLC传统同步整流方案整流精度不高、自适应同步整流方案精度高却需要高成本的高速数字控制器的缺点,设计了一种误差(同步整流管导通损耗)累积电路,通过低成本的MCU和V-I积分电路,将N个周期内同步整流管的续流时间累积为一个电压信号,与设定值相比较以决定下N个周期同步整流管的调整策略.在仿真测试中,同步整流管占空比稳定在47.7%,关断同步整流管后体二极管续流时间小于 2 ns,较好地满足了高效率、低占空比损失以及低成本的设计要求.
An Adaptive Synchronous Rectification Control Scheme Based on Error Accumulation Circuit and Its Implementation
The LLC's traditional synchronous rectification scheme is with low rectification accuracy.The adaptive synchronous rectifica-tion scheme is with high accuracy,but high cost high-speed comparator is required.In view of an error(synchronous rectifier tube con-duction loss)accumulation circuit is designed,which accumulates the freewheeling time of synchronous rectifier tube in N cycles into a voltage signal through low-cost low-speed comparator and I-V integration circuit,and the adjustment strategy of the synchronous rectifier for the next N cycles is determined by comparing with the set value.In the simulation test,the duty cycle of the synchronous rectifier is stable at 47.7%,and the diode continuation time is less than 2 ns after switching off the synchronous rectifier,which satisfies the design requirements of high efficiency,low duty cycle loss and low cost.

LLCadaptive synchronous rectification technologyerror accumulation circuitlow duty cycle losslow-cost digital controller

王宇帆、周子焱、张浩东、古兰心、王栋、钱钦松

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东南大学电子科学与工程学院,江苏 南京 210096

LLC 自适应同步整流技术 误差累积电路 低占空比损失 低成本数字控制器

江苏省科技发展重点项目国家自然科学基金项目国家自然科学基金项目国家自然科学基金项目

BE202048-35217226234055277192

2024

10.3969/j.issn.1005-9490.2024.04.019

电子器件
东南大学

电子器件

CSTPCD
影响因子：0.569
ISSN：1005-9490
年,卷(期)：2024.47(4)