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关于TIDA-00779的样板谐波和过流保护

Other Parts Discussed in Thread: TIDA-00779, TIDA-00143

您好,我按照TIDA-00779制作的测试版,采用的FIX PFC模式,但是在调试过程中,出现5A以上,电流成三角波,还有就是出现谐波超过8%,请问一般存在哪些问题才会出现此类现象?先谢谢