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用TI的UCC28019做APFC，主电路，控制回路参数均按照Datesheet计算出来的，功率因数校正的效果很好，但是输入电流的波形存在零点失真问题，无论如何调整相关器件参数都没有效果，请有用TI芯片做APFC的朋友来讨论一下是不是芯片设计的缺陷。谢谢！
