BQ76952: Turn-off and turn-on MOS speed of DFEOFF and CFEOFF of bq76952

mark zuo

Part Number: BQ76952

Dear TI engineer，

I found that using DEFOFF and CEFOFF to control the switching speed of MOS is not fixed, sometimes it is tens of milliseconds, and sometimes it is hundreds of milliseconds. Is there any setting that can control this speed.

Thanks

over 3 years ago

+1 WM5295 over 3 years ago

TI__Guru 54715 points

Hi Mark,

CFETOFF and DFETOFF for the BQ76952 do have a variable delay. See the entry in table 6-9 of the technical reference manual. To reduce the delay do not use SLEEP mode, but the delay may still be up to 250 ms depending on the timeline of the part.

0 mark zuo over 3 years ago in reply to WM5295

Prodigy 150 points

Hi WM5295,

Is there any way you can reduce the switching speed? 250ms is too long for me.

Thanks

0 mark zuo over 3 years ago in reply to WM5295

Prodigy 150 points

Is there a faster way for the host to give instructions?

+1 WM5295 over 3 years ago in reply to mark zuo

TI__Guru 54715 points

Hi Mark,

Turn off from CFETOFF and DFETOFF is fast, typically in the us range. Turn on is slow though, it happens on the 250 ms nominal timeline, so delays can be up to the 250 ms.

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BQ76952: Turn-off and turn-on MOS speed of DFEOFF and CFEOFF of bq76952