根据TPS2116的真值表设计了电路,我们期望当VIN1>1.5V时,VOUT输出VIN1,当VIN1<1.5V, VIN2>1.6V时,VOUT输出VIN2,
但是在实际测试中,VOUT一直与VIN1保持一致,在VIN1上的通断逻辑没问题,但是始终无法切换到VIN2。请问是什么原因?
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根据TPS2116的真值表设计了电路,我们期望当VIN1>1.5V时,VOUT输出VIN1,当VIN1<1.5V, VIN2>1.6V时,VOUT输出VIN2,
但是在实际测试中,VOUT一直与VIN1保持一致,在VIN1上的通断逻辑没问题,但是始终无法切换到VIN2。请问是什么原因?
According to the truth table of TPS2116DRLR, we expect VOUT to output VIN1 when VIN1>1.5V, and VOUT to output VIN2 when VIN1<1.5V and VIN2>1.6V. However, in actual tests, VOUT remained consistent with VIN1 and could not be switched to VIN2. What is the reason?
您好
根据datasheet真值表,对照您的电路设计,您的ST管脚上拉的请款下,您VIN2的变化不足以影响您的输出结果。
您好
您的VPR1 是多少?或者您去掉R33试试,可不可以切换到VIN2