TPS2373: Inquire about configuration of unused pins

Charles Jeon

Expert 2975 points

Part Number: TPS2373

Hi team

How do I handle unused pins in TPS2373-4?

Thank you.

over 6 years ago

0 Thomas Lewis over 6 years ago

TI__Expert 5615 points

Charles,

Have you, and the end customer, reviewed pages 16 and 32 in the TPS2373-4 datasheet?

Are you saying that you have some features/pins of the device which you are not planning to utilize? If so, which ones?

I can hand this over to our PD Applications Engineer once you provide a little more detail on exactly what you are asking.

Thank you for your local promotion and support of PoE products from Texas Instruments,

0 Charles Jeon over 6 years ago in reply to Thomas Lewis

Expert 2975 points

Hi Thomas

I send unused pin list.
- TPL(Pin17)
- TPH(Pin18)
- /BT(Pin19)
- UVLO_SEL(Pin16)

Thank you

0 Thomas Lewis over 6 years ago in reply to Charles Jeon

TI__Expert 5615 points

I will loop our PoE PD Application Engineer into this thread Charles.

Thank you,

0 Darwin Fernandez over 6 years ago in reply to Thomas Lewis

TI__Mastermind 41760 points

Hi Charles,

It is recommended to use TPx/BT signals as described in the FAQ below:

http://e2e.ti.com/support/power-management/f/196/t/743837?tisearch=e2e-quicksearch&keymatch=tph%20tpl

However, if for your application there is no use for it, you can leave TPx/BT pins OPEN.

For UVLO_SEL, it depends on the UVLO of the PWM controller you are pairing it with. If above 7.25V then it is recommended to leave it OPEN. If below 7.25V then it should be connected to RTN.

Power management

Power management forum

TPS2373: Inquire about configuration of unused pins