UCC2897A: During debugging, we have seen a weird phenomenon that sometimes the current when power off AP303P flow to the reverse direction through L202, but sometimes it does not.

user3597578

Prodigy 60 points

Part Number: UCC2897A
Other Parts Discussed in Thread: TPS2373,

Dear All,

Customer is using .tps2373 + ucc2897a to build a poe power,

They found there is output current unstable when power off . The output waveform please see attached file

AP303.zipCould you help with it ?

over 7 years ago

0 Peter Meaney over 7 years ago

TI__Mastermind 31580 points

Hi,

How is the UCC2897a been turned off?

We would need to see the Vdd, FB and OUT pin signals on the UCC2897a for both turn off conditions.

Thanks

Peter

0 Peter Meaney over 7 years ago in reply to Peter Meaney

TI__Mastermind 31580 points

Hi

Since there has been no activity on this post for two weeks I am closing the post. Please open a new post if you have more questions.

Regards

Peter

Power management

Power management forum

UCC2897A: During debugging, we have seen a weird phenomenon that sometimes the current when power off AP303P flow to the reverse direction through L202, but sometimes it does not.