UCC25661: UCC28064A+UCC256614 PFC ON/OFF (TSET2TSET)

Chris Wang

Part Number: UCC25661
Other Parts Discussed in Thread: UCC28064A

Tool/software:

Can I use the TSET pin from the UCC256614 to the TSET pin of UCC28064A for disable the PFC when LLC enters into burst mode?

0 JCHK 1 month ago

Hi Chris,

The best way to disable the UCC28064A is to pull the VSENSE Pin to GND:

I hope this answers your question.

0 Chris Wang 1 month ago in reply to JCHK

Why cann't TSET to TSET?

+1 JCHK 1 month ago in reply to Chris Wang

Hi Chris,

You can, but in this case the IC is fully awake and waiting for the fault to clear. Pulling VSENSE low puts it into a lower power state.

I hope this answers your question

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