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TPS23881: 90W BT

Kaileh
Intellectual 620 points
Part Number: TPS23881
Other Parts Discussed in Thread: TPS2373, TPS23861,

Hi Sir 

1. I saw TPS23881 can't support auto mode ,have to use a MCU to prgram SRAM ,is it correct 

2. If first time to design TPS23881 ,which design guide document I can refer to first ?

3. if we would like to design one port only ,Could i floating the pin or need to pull down ?

4. for 90W PD ,TPS2373 is the only one solution ,is it correct ?

Thanks 

  • 0
    TI__Mastermind 41760 points

    Hi Kaileh,

    1. There are really two features here that'd like to help distinguish. There is autonomous mode (like in the TPS23861 that needs no MCU which TPS23881 currently does not support). There is auto mode (TPS23881 does support) where the MCU sets the IC to auto mode and PSE will automatically do detection class and power up. Note, you will need the MCU to set the TPS23881 into auto mode to do this in addition adding the v5 firmware SRAM patches shown in the EVM product page below.

    2. Since this is the first time, I recommend going through the TPS23881EVM-008 user's guide to help you get started. This way you can use the EVM and go through the steps for setting it up so that you fully know how to use the TPS23881 and evaluate its performance. In addition, the TPS23881 has a lot of training material on how to get started with the GUI and software resources.

    3. For unused channels, I recommend you short sense and ksense to ground. And gate and drain should be floating. 

    4. If this is a pass through system (PD input then PSE output), I recommend using the TPS2372-4 which is also designed for 90W. Thanks! 

  • 0 in reply to Darwin Fernandez
    Intellectual 620 points

    Hi Darwin 

    May I know which solution you focus to promote?

    TPS23881 or TPS23881A

  • 0 in reply to Kaileh
    Intellectual 620 points

    Hi Sir 

    Have any good news about this question ?

  • 0 in reply to Kaileh
    TI__Mastermind 41760 points

    Hi Kaileh,

    Sorry for the delay as the US was in holiday last week.

    Majority of applications will use the non-A version of the TPS23881.

    To give you some background, the A-version is filled with a ULA mold compound to have a more robust SRAM from alpha particles. Otherwise, it is exactly the same as the non-A version.

    Thanks!