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TPS566235: Output Capacitance

d_zero
Genius 4775 points
Part Number: TPS566235

Dear *,

is it possible to have more capacitance on the output of TPS566235  than is described in Table 3 page 16 of DS ( 110uF) ?

How is the mAX capacitance Cout calculated?

Best Regards,

David.

  • 0
    TI__Genius 15135 points

    Hi, David

    110uF is TI recommended MAX Cout.

    You can use the bigger Cout, but please note:

    During soft start, the Vout is a linear ramp up which requires a constant charging current I = Cout * Vout / Tss, this current is called inrush current, usually, it should be smaller than 1A, so we can calculate the max Cout is 1A*1mSec/Vout.

    However, TPS566235 has very good load transient performance, it doesn't need very large Cout, i think Cout=110uF is enough for majority application.

    Besides, 110uF has been validated by TI.