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TPS65131: Maximum Current on the input side

Mark Philip Felipe
Genius 10830 points
Part Number: TPS65131

Hi Team, when the device is operating, at +/-15V output and 5.5V input, we would like to know the current-driven on the input side. 

Thank you very much.

Regards,

Mark

  • 0
    TI__Expert 6330 points

    Hi Mark,

    I have notified our expert regarding this topic. Please expect a response by 5/22/20. 

    Thanks,

    Aaron

  • 0
    TI__Mastermind 18550 points

    Hello Mark,

    You can calculate input current for each converter with the equation Iin= Iout * (Vout/(Vin*n))+ (ripple current/2). So the input current will depend on the output load current, ripple current and converter efficiency. As an approximation, you can assume 80% efficiency (n=0.8) and ripple current to be 25% of Iout load current (ripple current =0.25*Iout).

    Kind Regards,

    Liaqat