UCC256304: X CAP discharge compliant with IEC62368?

Brian McDonald

Prodigy 140 points

Part Number: UCC256304

Hi,

Just wondering if anyone has any information on UCC256304 X-cap discharge function compliance with IEC62368?

Thanks,

Brian

over 6 years ago

0 Benjamin Lough over 6 years ago

TI__Mastermind 27095 points

Hi Brian,

Thanks for your interest in UCC256304. Yes, this controller is compliant with IEC62368. here is a link to the compliance document:www.ti.com/.../szzq161.pdf

Best Regards,
Ben Lough

0 Brian McDonald over 6 years ago in reply to Benjamin Lough

Prodigy 140 points

Thank you. that is perfect. I have one more question that may be answered in the detailed certification report. Is there any issue with single faults on the series resistors connected to the HV pin? My understanding is that X-cap discharge must be tested under single fault conditions and if the UCC25630x series require series resistors in the HV pin as stated by the datasheet then a failure of one of these resistors would surely disable the X-cap discharge function. If so, is there a suggested work around? eg. 2 parallel resistors in series with HV pin.
Would it be possible to see the full test report?

Thanks,

0 Benjamin Lough over 6 years ago in reply to Brian McDonald

TI__Mastermind 27095 points

Hi Brian,

I don't have a copy of the full test report unfortunately. Putting two resistor strings in parallel should be OK however.

Best Regards,
Ben Lough

0 Brian McDonald over 6 years ago in reply to Benjamin Lough

Prodigy 140 points

Thanks ben.

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UCC256304: X CAP discharge compliant with IEC62368?