TPS22810: Reverse current

Hi Jejomar,

Thank you for reaching out to the E2E forum!

The TPS22810 was not designed for events when there's reverse current involved (flowing from VOUT to VIN). Therefore, we do not have data for this type of configuration.

Could you elaborate on the reverse current condition that could happen? If possible test values?(i.e. voltages at VIN, VOUT)

With some test conditions I could talk to the designers to see if we could figure out how the part would behave and see if the TPS22810 is a good device for your design.

Regards,

Andy Robles

Hello Andy,

Thank you for looking into this. The application is 12V battery powered mobile system. Input to the load switch is the battery. At the field, users would most of the time disconnect the battery without powering down the system, having ~250mA for about 1ms reverse current flow from the load switch output to input. Although it is for only 1ms, the peak reverse current is 250mA. Several load switches have failed at these conditions, so we are looking to see if the TPS22810 would be applicable for this application.

Kind Regards,

Jejomar

Hi Jejomar,

In order to fully asses the behavior of the TPS22810 I will need some additional information for this issue. Would you able to provide information for the following questions:

1. Have any of the failed load switches been from TI?

2. How exactly do these load switches fail? Does the reverse current make them fail in a certain way?

3. What is the load capacitance that is sending this reverse current through the load switch?

4. What is the rate at which VIN decreases when the battery is disconnected?

5. Any additional technical information you think might be worth pointing out? The more information you can provide will allow us to make proper assessment of our device under these conditions.

Regards,

Andy Robles