有一点不太明白,关于UCC28070那个300W Interleaved PFC(文档slua479),那个电流检测部分,RSA与ROA与VCC提供一个大约0.2V的偏置电压,不太明白的是RTA与CTA,DPA1组成的电路,这一部分电路起到什么作用啊,没太看明白,希望各位高手予以解答。
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