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UC3844: 问题描述如下:

Part Number: UC3844

Dears

近期在使用UC3844做反激电源时遇到如下问题如下:

1.辅源电路设计功率300W,主路是24V输出,电路原理图如下:

 2.问题描述:反激电源在轻载、半载及重载时均出现了相同的间断发波具体波形如下:

a)2A负载测试波形如下;

b).6A负载测试波形如下:

c)8A负载测试波形如下:

d)展开波形图1

e).展开波形图2