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UCC256301: RVCC output use as UCC28180 VCC power

K. Sasaki14
Guru 10200 points
Part Number: UCC256301
Other Parts Discussed in Thread: UCC28180,

Can we use UCC256301 RVCC output as UCC28180 VCC power?

RVCC output min value is 11.6V and UCC28180 VCC turn on threshold max value is 12.1V.

So Can't we use UCC256301 RVCC for UCC28180VCC?

Is this my understood correct?

Best Regards,
Kohei Sasaki

  • 0
    TI__Mastermind 27105 points
    Hi Kohei,

    Thanks for your interest in UCC256301 and UCC28180. Your understanding is correct, due to the VCC UVLO trip point of UCC28180, you will want to use a different voltage source to provide power to UCC28180. You could do a zener clamped emitter follower between UCC256301 VCC pin and UCC28180 VCC pin to power the PFC controller.

    Best Regards,
    Ben Lough