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UC3875: 如何通过E/A OUT引脚调节移相角

Part Number: UC3875
Other Parts Discussed in Thread: UCC3895

我的设计目标是,100kHZ条件下,DC/DC变换,输入400V,输出150V。不太明白产品数据表中的说明,实际应用中如何通过E/AOUT、EA+、EA-来实现移相,EA-是实际的输出电压,EA+是参考电压,E/AOUT是他俩的差值,这样的理解是正确的吗,以下是我采用的参考电路,我不理解这个设计中的E/AOUT输出采用电阻电容并联实际的作用是什么,改变可变电阻就可以改变移相角了吗?