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TPS54340电流环在低压差时响

Other Parts Discussed in Thread: TPS54340

第一次用TPS54340,做了电压和电流双环,输入19V,输出16.8V,限流1.5A给电池充电用。测试负载用CV模式,输入在17V,负载15V-16V左右会响。基本上输入低于18V后,输出和输入有1-2V压差时候很响,对应频率从500K掉至10几K,在人耳范围内