电子器件2025，Vol.48Issue(2)：319-323,5.DOI:10.3969/j.issn.1005-9490.2025.02.013
宽输入电压范围正反激变换器的参数设计
The Parameter Design of Forward-Flyback Converter with Wide-Input Voltage Range
张立飞 1李俊斌 1王夏莲 1于长存1
作者信息
- 1. 北京七星华创微电子有限责任公司,北京 100015
- 折叠
摘要
Abstract
Due to its linear input-output relationship,the forward-flyback converter is high suitable for applications with wide-voltage in-puts.By incorporating active embedded magnetic reset technology and self-driving synchronous rectification technology,efficient power conversion can be achieved.However,designing a self-driving synchronous rectification drive circuit becomes challenging when dealing with wide-voltage inputs.The voltage range of the transformer's primary coil varies widely,resulting in a significantly wider voltage range for the self-driving winding compared to the relatively strict driving voltage range of the synchronous rectification MOS tube.To address this issue,a design scheme of a third winding cascading grid driver as a synchronous rectification drive circuit is put forward based on the analysis of the working mode and parameter design process of the forward-flyback converter.The advantages of this scheme are ana-lyzed and a solution is provided to mitigate direct-pass risks caused by device differences.Finally,an experimental prototype capable of handling 16 V～50 V input and delivering 150 W/12 V output is constructed to validate theoretical analysis.关键词
正反激变换器/宽压输入/参数设计Key words
forward-flyback converter/wide-voltage input/parameter design分类
动力与电气工程引用本文复制引用
张立飞,李俊斌,王夏莲,于长存..宽输入电压范围正反激变换器的参数设计[J].电子器件,2025,48(2):319-323,5.
