TPS2373: POE circuit question

Patrick Chen

Mastermind 8875 points

Part Number: TPS2373

Hello

per below, if customer change C28 to three 33uF/100V for parallel. Has nay problem for it?

　　　　　　if customer not need external adapter, how to modify the schematics? Thank you.

Patrick

over 4 years ago

0 Darwin Fernandez over 4 years ago

TI__Mastermind 40120 points

Hi Patrick,

Yes they can have multiple electrolytic cap in parallel for the bulk cap with no issue.

For the adapter they can remove the all the APD and ADPT circuits as long as APD on the IC is pulled to RTN with a resistor.

0 Patrick Chen over 4 years ago in reply to Darwin Fernandez

Mastermind 8875 points

Hello

If remove APD and ADPT circuit while no adapter, how to connection to below green circle APDT? How to modify schematics? Another questions, if customer to disable POE, how to do it? Thank you.

Patrick

0 Patrick Chen over 4 years ago in reply to Patrick Chen

Mastermind 8875 points

Hello

Has any update for above question?

Patrick

0 Darwin Fernandez over 4 years ago in reply to Patrick Chen

TI__Mastermind 40120 points

Hi Patrick,

Sorry for delay as i am out of the office. R67 up to L8 components can be removed if there is no adapter.

Why disable PoE if there is no other adapter? Is adapter on secondary? If so, you need to pull DEN LOW to disable PoE.

Like described in Figure 10 of the app note below.

http://www.ti.com/lit/an/slva306a/slva306a.pdf

0 Patrick Chen over 4 years ago in reply to Darwin Fernandez

Mastermind 8875 points

Hello

If disable POE, has any concern for below schematics? Thank you.

Patrick

0 Darwin Fernandez over 4 years ago in reply to Patrick Chen

TI__Mastermind 40120 points

Hi Patrick,

I see no issue with the components in the schematics if PoE is disabled. Be sure R29 is rated for slightly higher power since more current will flow through this resistor when the adapter is plugged in. Thanks!

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TPS2373: POE circuit question