摘要： 移相全桥拓扑因为能够实现真正的软开关，降低高频下的开关损耗，得到了越来越广泛的应用。研制了基于UCC1895的300 W移相全桥电源，介绍了其电路结构和软开关的实现原理，说明了主电路的设计过程以及关键器件的选型依据。利用低侧单通道驱动芯片和隔离变压器解决了UCC1895驱动能力不足和全桥上下管驱动隔离的问题。通过对仿真波形和试验数据的分析证明了整体方案的合理性。

中图分类号： TN624
文献标识码： A
DOI：10.16157/j.issn.0258-7998.212437
中文引用格式： 林杰，马文超. 基于UCC1895移相全桥电源的设计[J].电子技术应用，2022，48(9)：140-144.
英文引用格式： Lin Jie, Ma Wenchao. Design of phase shifted full bridge power supply based on UCC1895[J]. Application of Electronic Technique，2022，48(9)：140-144.

Design of phase shifted full bridge power supply based on UCC1895

Abstract： Phase shifted full bridge topology has been more and more widely used because it can realize real soft switching and reduce switching loss at high frequency. A 300 W phase shifted full bridge power supply based on UCC1895 is presented. Its circuit structure and the implementation principle of soft switching are introduced. The design process of the main circuit and the selection basis of key components are explained. The problems of insufficient driving capacity of UCC1895 and driving isolation of upper and lower MOS of the full bridge are solved by using low side single channel driving chip and isolation transformer. Through the analysis of simulation waveform and test data, the rationality of the overall scheme is proved.

Key words : soft switching; phase shifted full bridge; UCC1895