UCC28950: UCC28950 +- Vsense issue

user6004348

Intellectual 390 points

Part Number: UCC28950
Other Parts Discussed in Thread: UCC39002, , UCC29002

HI sir

I have a model using UCC28950+UCC39002, I tried to add +- Remote Vsense function, but -Vsense function is abnormal.

I would like to send you the circuit diagram to make sure it is correct ?

TKS

over 3 years ago

0 David Huang33 over 3 years ago

TI__Genius 9140 points

Hello User,

thanks for your interest in UCC28950 and UCC39002.

please send the circuit diagram in the post, and let us know which function is abnormal?

thanks.

0 Mike O' over 3 years ago in reply to David Huang33

TI__Guru* 86126 points

Hello,

I would recommend checking the model in two stages. First see if the UCC28950 is working correctly by itself. Once you have that model working then move on to trouble shooting the UCC29002.

If you have issues with the UCC28950 I can help you with this. However, if the modeling issues are with the UCC29002 David can help you with that.

Regards,

Mike

0 user6004348 over 3 years ago in reply to David Huang33

Intellectual 390 points

HI David

1:Because the -Vsense function is abnormal so I want to know if the +- Vsense connections in the circuit are correct

2: If it is not correct how can I improve it

3:Do you have reference lines that use UCC28950 and UCC39002 and have +- remote Vsense capabilities

PM800-1X (P1).pdf

PM800-1X (P3).pdf

0 David Huang33 over 3 years ago in reply to user6004348

TI__Genius 9140 points

Hi,

I can not confirm whether +/-Vsense already connect at the terminal point of the system, I suggest you can follow below captured from reference design to check the remote sense connecting.

the reference design link is :

https://www.ti.com/lit/ug/sluu137b/sluu137b.pdf?ts=1644483260650&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FUCC29002%253FkeyMatch%253DUCC29002%2526tisearch%253Dsearch-everything%2526usecase%253DGPN

and since the FAE already discussed with you through email, I suggest if you still have any question, we can discuss this through email.

Power management

Power management forum

UCC28950: UCC28950 +- Vsense issue