一种基于大功率DPL负载的DC/DC变换器的设计

The Design of a DC/DC Converter Based on High-Power DPL Load

摘要: 为了满足大功率DPL激光器对驱动电压和脉冲大电流的需求，文章设计了一种DC/DC变换器，采用Buck + Half-Bridge级联拓扑。为了承担大容量容性负载，在电路次级利用隔离驱动器设计了防倒灌电路，可以消除电路重复启动时引起的电流倒灌的隐患，该电路简单可靠，易于集成，有利于电路的模块化、小型化设计。文章针对变换器的关键参数进行设计与试验验证，并对试验结果进行了分析。

Abstract: To meet the requirements of high-power DPL lasers for driving voltage and pulsed high current, this paper designs a DC/DC converter using a Buck + Half-Bridge cascaded topology. To accommodate high-capacity capacitive loads, an anti-backflow circuit is designed using an isolated driver in the secondary stage of the circuit, which eliminates the potential risk of current backflow caused by repeated circuit startup. This circuit is simple, reliable, and easy to integrate, facilitating modular and compact circuit design. This paper focuses on the design and experimental verification of key parameters of the converter, and analyzes the experimental results.