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TPS63811: Efficiency graphs and load transient response graphs for FPWM mode

Eugene S.
Intellectual 680 points
Part Number: TPS63811

Hello,

Looks like efficiency graphs and load transient response graphs for PWM mode are missed in the datasheet. Any way to see it?

Thanks,

Eugene

  • 0
    TI__Expert 7925 points

    Hi Eugene,

    Thanks for reaching out.

    Yes, we did not put graphs for forced-PWM mode. What are the specific operating conditions that you are interested in (Vin, Vout, Iout), so we can look into it?

    Best regards,
    Milos

      

  • 0 in reply to Milos
    Intellectual 680 points

    Hi Milos,

    My worst conditions are Vin=3.5, Vout=4.1V and Iout=1A (pulsed from 0 to 1A). 

    Thanks!

  • 0 in reply to Eugene S.
    TI__Expert 7925 points

    Hi Eugene,

    This is a typical efficiency under your Vin/Vout conditions:
    Vin = 3.5 V, Vout = 4.1 V


    As for the load transient measurements, we do not have it for your exact conditions. The closest we have is for Vout = 5.2 V and Iout = 0 A to 2 A:

     
    For your case, you can expect about half the value than for the above conditions, therefore, undershoot about ΔVout- = 200 mV, and overshoot around ΔVout+ = 150 mV.

    Best regards,
    Milos