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LM25183: LM25183在轻载的时候,变压器啸叫且输出电压纹波大,当输出一半负载时,恢复正常

Part Number: LM25183

LM25183在轻载的时候,变压器啸叫且输出电压纹波大,当输出一半负载时,恢复正常,请问是芯片反馈问题吗