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TMCS1126-Q1: Vref Cap Capacity Inquiry

HOIWOONG JUNG
Prodigy 50 points
Part Number: TMCS1126-Q1

Tool/software:

HI~

TMCS1126A7AQDVGR-Q1 is being used, and the understanding Vref is shaken by noise, so the cap is designed by applying 1uF.

If I look at the application notes, Vref is 4.7nF and 20nF, what is the problem if I apply 1uF?

  • 0
    TI__Expert 7965 points

    Hello,

    A capacitor on Vref can cause ringing or oscillations on the device output because the output amplifier feedback network will become unstable, so it is best if the capacitance be kept small or isolated by a resistor as the application notes mention.

    Let me know if you have any more questions,

    Levi DV