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LM5025: 沒有輸出電壓

Part Number: LM5025

我電路是照 https://www.ti.com.cn/cn/lit/ug/snvu096/snvu096.pdf?ts=1695276006728&ref_url=https%253A%252F%252Fwww.ti.com.cn%252Fproduct%252Fcn%252FLM5025 來做的

目前我認為沒有輸出電壓的問題是因為我二次側沒有電壓,而導致光耦合輸入端沒有訊號,照成IC沒法正常工作。

但目前我沒有頭緒要如何修改我的電路。