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TPS4816-Q1: schematic check

GARETH OU
Guru 12405 points

Part Number: TPS4816-Q1

Hi

Currently, power is not supplied; the FLT displays "low," and pins 16 and 13 are both "low." Please suggest where the schematic needs adjustment. Thanks

 

tps4816q1.pdf 

 

  • 0
    TI__Genius 16450 points

    Hi Gareth, 

    Why would you expect pins 16 and 13 or FLT to be high if there is no voltage? 

    VIN must be HIGH to power your FLT pull up and device will also be off if VS < POR.

    Thanks,

    Sarah

  • 0 in reply to Sarah Raines
    Guru 12405 points

    Hi Sarah

    Sorry, let me explain. The input voltage is normal, but there's no output.

    Because Q2 lacks reverse connection protection, SRC is directly connected to the load, but the load has many capacitances, as shown in the red box in the diagram.

    What impact will this have?

    Thanks