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lm5106HO输出偏低,TPS61040负压偏低

Other Parts Discussed in Thread: TPS61040, LM5106

您好,现在在使用LM5106做推挽输出,有贵司的TPS61040产生正负7V电压供电,一方面发现产生的负压只有-5.6V左右(正电压正常),另一方面lm5106的HO输出高电平偏低只有4.2V左右,请问是何原因导致

LO输出如右侧:

HO输出如右侧

两者的:

LO的低电平反应了tps61040产生的负压,高电平反映了tps61040产生的正压,请问那个元件可能导致上述两个问题,谢谢!