Tool/software:
Hello:
The customer is debugging the TI chip TPS2116DRLR chip, and a single chip is abnormal. Please help analyze it.
Abnormal: When VIN2 is powered normally, when the preferred VIN1 is inserted, that is: USB_C_VCC power supply, it cannot switch to VIN1 power supply normally. Please help analyze it.
The specific circuit diagram is as follows:
Under normal circumstances, when VIN1 is powered, VIN1 must be powered, and the voltage division of PR1 is about 1.6V. There is a problem with the switching. When VIN1 is powered, VIN2 is also powered, resulting in failure to switch. See abnormal waveform 2 for details.
Normal waveform
abnormal waveform
please help check
2、Another abnormal IC has been added. Cross-verification follows the IC. VIN1 has 5V power, VOUT is about 3.1V, VIN2 has 5V power, and VOUT is normal 5V. This is also quite serious. Please help check，Thanks！！！
