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TPS2121: switching between IN_1 and IN_2 issue

Nshah
Prodigy 65 points
Part Number: TPS2121

We prepared a design using TPS2121, for a reference part of the design attached here. So please review our schematic design and suggest if any changes required. 

We noticed when both inputs IN_1 and IN_2 are connected and if we remove IN_1 (USB) our device gets reset.

VCC_USB = 5V

VCC_BAT = 6V

  • 0
    TI__Genius 10652 points

    Hi, 

    Nshah said:

    We noticed when both inputs IN_1 and IN_2 are connected and if we remove IN_1 (USB) our device gets reset.

    VCC_USB = 5V

    VCC_BAT = 6V

    What do you mean by "reset"? According to your configuration, IN1 voltage (VCC_USB) drops below ~2.14V, the device will automatically switch to IN2( VCC_ BAT).

    Could you provide scope shots which describe the behavior you are seeing?

    Best

    Dimitri