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LM5026: LM5026轻载工作异常,有噪音且输出电压脉动

Part Number: LM5026
Other Parts Discussed in Thread: TLV431,

我复制的DEMO版100W3.3V30A,输入电压40V。在0——3A时有两个问题。1.变压器会有噪音,且CS波形OUTA波形输出波形均不正常。2.空载的DEMO板为什么占空比也是50%呢? 请求指点!