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UCC28950: ucc28950

Part Number: UCC28950

UCC28950单板测试,刚上电瞬间输出是有波形的,稳定以后就没有输出波形了,板子状态DCM直接接地,EN电压4.5V,参考电压4.95V.状态正常,但就是稳定后没有输出,求解答。