UC2902: Single Configuration Test Method

KIM Andy

Part Number: UC2902
Other Parts Discussed in Thread: UCC256303, UCC28070,

Hello
My client has developed 800w signage SMPS.
The configuration is UCC28070 + UCC256303 + UC2902.
UC2902 has been applied because there is a case where LOADSHERE is added by adding the same board.
Is there a way to verify that the UC2902 is functioning normally in a single configuration?
If you need additional input nearby, please let me know how.

over 6 years ago

0 John Griffin1 over 6 years ago

TI__Mastermind 34465 points

Hello Andy,

How many UC2902 load share controllers are being used and what is the load current?

You can verify the load sharing accuracy of the UC2902 by measuring the voltage across the current sensing resistor.

Regards

John

0 KIM Andy over 6 years ago in reply to John Griffin1

Expert 2530 points

Hi John,

The output is 48V / 15.7A.

On one board, the share pin is open.
The VCC of the UC2902 is 12V.
At this time, you want to check whether ic is operating normally.

Please tell me how to detect it.

Thank you.

0 John Griffin1 over 6 years ago in reply to KIM Andy

TI__Mastermind 34465 points

Hi Andy,
Sorry about the delay in replying.
If you leave the load share pin open then the UC2902 is not going to know what the correct current level should be.
You need to connect all modules together with the LS pins.
Hope this answers your question
Regards
John

0 John Griffin1 over 6 years ago in reply to John Griffin1

TI__Mastermind 34465 points

Hi Andy,
Since it is almost 3 weeks since your last posting.
I am marking this post as closed.
Please open a new post if you require further assistance
Regards
John

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UC2902: Single Configuration Test Method