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LM5181-Q1: 从DCM模式转BCM模式会出现类似次谐波振荡波形

Part Number: LM5181-Q1

输入15V, 输出18V 0.12A, 匝比1:1.4,感值40uH. 测试时在70-90mA时从DCM模式转BCM模式出现类似次谐波振荡波形 ,在100mA BCM模式又是正常的。请教是啥原因,另外LM5181-Q1反馈采样的时机在MOS关断后哪个区间。