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TPIC74100-Q1 output capacitor

Other Parts Discussed in Thread: TPIC74100-Q1

I have confirmed the output capacitor for TPIC74100-Q1.

In the application note (SLIA083), there are conditions of output capacitor (value and ESR).

And in the user's guide of TPIC74100-Q1 EVM (SLIU002), there is the schematic of the EVM.

In the EVM, output capacitors are tantalum and ceramic.

I have check the ESR for the tantalum and ceramic capacitor.

The values of ESR are

Tantalum: 0.11 ohm, ceramic: about 0.02 ohm

In this case (the EVM), I think the value is not mached the condition in the application note.

I don't know how to define the conditon by parallel capacitors (ex. ceramic and tantalum) .

Could you please advise it to me?

Best regards,

Atsushi Yamauchi

  • Please check the attached document for detail explanation. I hope this make it clear for you.

    Regards, Mahmoudhttp://e2e.ti.com/cfs-file.ashx/__key/communityserver-discussions-components-files/26/4263.capacitors-in-parallel.pptx

  • Dear Mahmoud-san,

    I have almost unuderstood it.

    But I have the question of ESR value of the capacitor.

    ESR has the frequency characteristics. I don't know ESR value for the stability of it.

    How much is the value for the stability in the datasheet?

    How do we consider the value for the parallel conections of output capacitor?

    Best regards,

    Atsushi Yamauchi