TPS22933: Max. input/output current when using CAP pin only

Chris Schramm

Part Number: TPS22933
Other Parts Discussed in Thread: TPS2121, TPS2115A

This sort of has been asked already here:

But to the most important question, there's still no answer:

Assumed we use the TPS22933 for ORing to a battery charger, is it possible to only use CAP out? If so, what's the maximum input and maximum output rating? Is it still 50mA? Or is the "Autoswitch" (as seen in the diagram) capable of higher currents?

over 5 years ago

0 Alpha H over 5 years ago

TI__Genius 10855 points

Hi Chris,

Thanks for reaching out on E2E!

You are correct, the CAP pin of the TPS22933 can only support 50mA LOUT current. If you're looking for a different power mux device that can support ORing for a battery charger, I recommend taking a look at the TPS2121 or the TPS2115A. The TPS2121 can operate over a larger voltage range and offers additional protection features such as overvoltage protection, current limit, and thermal shutdown, whereas the TPS2115A offers better IQ, ISD, and Ron than the TPS22933.

Thanks,

Arthur Huang

To find the latest information on Power Switches, visit www.ti.com/powerswitch

Please click "This resolved my issue" button if this post answers your question.

0 Chris Schramm over 5 years ago in reply to Alpha H

Intellectual 590 points

Thank you, Arthur, for the quick reply and the alternatives - which are awesome but won't fit the budget, unfortunately.
Last question: is there a drop between VINs and CAP?

0 Alpha H over 5 years ago in reply to Chris Schramm

TI__Genius 10855 points

Hi Chris,

There shouldn't be a drop between VIN and CAP.

Thanks,
Arthur

0 Chris Schramm over 5 years ago in reply to Alpha H

Intellectual 590 points

Thanks Arthur!

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TPS22933: Max. input/output current when using CAP pin only