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TPS22913C battery protection

DanR
Prodigy 240 points
Other Parts Discussed in Thread: TPS22913

Hi, I’m reading TPS22913C datasheet, and on one page it says: “The TPS22913 device provides circuit breaker functionality by latching off the power-switch during Under-Voltage Lock Out reverse voltage situations.” On another page in Absolute Maximum Ratings it mentions that Vout cannot be above Vin+0.3V. So my question is – can TPS22913C be used as an ideal diode to protect Li-Ion battery from wall charger current flowing back to it?

Thanks!

Dan

 

  • 0
    TI__Intellectual 1245 points

    Hi Dan,

     

    When the device is active the voltage comparator disables the power-switch when Vout is higher than Vin to quickly stop the flow of current towards the input side.  The TPS22913C protects against reverse current towards the input so in that respect yes it can act like a diode, limiting the current to a signal direction.    What are you going to be tying your control signal too? 

     

    Regards,

    Geovid Kali

  • 0 in reply to Geovid Kali
    Prodigy 240 points

    Thanks Geovid. My customer responded with the following...

    Makes sense – but could you please confirm that it’s OK to put 5V on the output with ~3V at the input? Could you please send them the attached schematic and ask if that looks OK. Also, I’m controlling the EN by a presence of a 3.3V on the internal ARM rail, so that my auxiliary DCDC converters power up/down with the ARM.

  • 0 in reply to DanR
    TI__Intellectual 1245 points

    No you can not put 5Vout with 3Vin.