BQ24780S: Could you tell me time duration from CMPOUT pin asserts (High to Low) to PROCHOT pulse is asserted?

K.Yaita

Part Number: BQ24780S

Hi Team,

My customer considers to use independent comparator to assert PROCHOT by enabling bit 6 of 0x3Dh.

I believe "Independent Comparator Deglitch Time" can be set by bit [5:4] of 0x3Bh.
Could you tell me time duration from CMPOUT pin asserts (High to Low) to PROCHOT pulse is asserted?

Best Regards,
Yaita / Japan disty

over 7 years ago

0 Wang5577 over 7 years ago

TI__Guru 56650 points

No delay time is found in the datasheet. The timing should be very quick.

0 K.Yaita over 7 years ago in reply to Wang5577

Guru 29720 points

Hi Wang-san,

Thank you for your support.

It seems "Independent Comparator Deglitch Time" can be set by bit [5:4] of 0x3Bh.
Is "Deglitch Time" the delay time from CMPIN falling to threshold to CMPOUT asserts?

I believe it but would like to ask just in case.

Best Regards,
Yaita

0 Wang5577 over 7 years ago in reply to K.Yaita

TI__Guru 56650 points

Yes. "Independent Comparator Deglitch Time" is from CMPIN flipping to CMPOUT flipping.
"Deglitch Time" is a little bit different than a delay time if the CMPIN is too noisy. "Deglitch time" can ignore a CMPIN noise spike if the noise pulse width is shorter than the deglitch time.

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BQ24780S: Could you tell me time duration from CMPOUT pin asserts (High to Low) to PROCHOT pulse is asserted?