This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

UCC2894: UCC2894,不加过流保护电路,启动时会烧MOS问题

Part Number: UCC2894


大家好:

           我使用UCC2894 做了一个有源钳位反激电路,电源输入是230VAC  输出70DC。当我把过流保护电路取消(原理图中的D3拆掉),在启动过程中,或者带载老化过程中(都出现过),会出现在MOS管烧坏的现象(只是烧MOS管,其它不烧,应该是先烧钳位那个MOS管)。帮忙分析一下原因,通过改什么参数可以改善这个问题。谢谢!