集成电路与嵌入式系统2024，Vol.24Issue(7)：52-58,7.
一款高效率宽输入电压边界导通模式反激变换器
A high-efficiency wide input voltage boundary conduction mode flyback converter
李娅妮 1周志余 1张琳琨 1党志烜 1朱樟明1
作者信息
摘要
Abstract
This paper presents a high-efficiency wide input voltage boundary conduction mode flyback converter.To prevent chip over-shoot and undervoltage during load switching,a new mode switching loop composed of current regulating circuit(CRC)and adaptive fre-quency control circuit(AFCC)is proposed.This configuration facilitates smooth transition between different modes,enhancing the tran-sient response of load and the conversion efficiency of chip.Additionally,the current regulation control technology is introduced into the loop to reduce the charge current on the primary side in low ripple burst mode which lowers the minimum load current on the secondary side,thereby reducing switching frequency under light loads and power consumption.Based on the 0.18 pm BCD process,the circuit de-sign and layout design are realized,and the chip area is 1.48×2.5 mm2.The simulation results show that under input voltage ranging from 3～32 V and output voltageat 5 V,the maximum change of the transient response of the output voltage is 6％and the peak conver-sion efficiency reaches 88.6％.关键词
反激变换器/边界导通模式/模式切换/宽输入电压/自适应时间控制Key words
flyback converter/boundary conduction mode/mode switching/wide input voltage/adaptive time control分类
信息技术与安全科学引用本文复制引用
李娅妮,周志余,张琳琨,党志烜,朱樟明..一款高效率宽输入电压边界导通模式反激变换器[J].集成电路与嵌入式系统,2024,24(7):52-58,7.
