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UCC28070做无桥PFC, 2路发热差异较大



1. 测试电流波形看,是以50HZ上下半周分别通过两路工作的? 这样就不是在一个PFC的PWM周期内2路交错了,是这样吗?

2. 低输入电压下2路的MOS管发热、温升不同,差了几十度,怎么改进?