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请问改变芯片哪个管脚的参数可以调节交流输入端的功率因数（想实现功率因数的可调）？我猜测是补偿脚的阻值，但做过实验调节5脚的电阻R16的阻值，但是功率因数不会变，求大侠解答。芯片资料英文看的懵懵懂懂的，谢谢…
