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LM3150MH输出12V10A，无负载时正常输出，带上负载输出电压被拉低，电压不稳，且SW端口波形变形

fang wan
Prodigy 20 points


电路如上图

下图是SW端不带负载时波形

下图是带负载时sw端口波形

请教各位大神