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TPL5111芯片DRV管脚输出电平反向

Other Parts Discussed in Thread: TPL5111

你好,工程师:


问题描述:
我想用TPL5111的DRV驱动LDO的EN脚,LDO的输出端不接负载时,LDO的输出电平呈现周期性断电(持续高电平,周期性出现脉冲宽度为50ms的低脉冲),功能正常。当LDO接负载后,TPL5111的DRV管脚输出电平呈现相反的状态(持续低电平,周期性出现脉冲宽度为5ms的高脉冲)。

问题1:接负载与不接负载的情况下,电平为什么会出现反向?

问题2:为什么脉冲宽度不一样,一个是周期性50ms的低电平脉冲(正常状态),一个是周期性5ms的高电平脉冲?


谢谢!