BQ78350-R1: Delay time for KEYIN toggling FET.

Tom Tsao

Expert 1870 points

Part Number: BQ78350-R1
Other Parts Discussed in Thread: BQ76930

Tool/software:

Hi E2E,

I am using the BQ78350-R1 with the BQ76930 AFE.

When my KEYIN is triggered, it takes about 4 seconds for the FET to start toggling.

I have already set the KEYIN Time to 0.

Is there another setting in the data memory that I am missing?

Thank you!

over 1 year ago

+1 Dominik Hartl11 over 1 year ago

TI__Guru 61906 points

No, this is the performance of this device. The code that checks this runs on a 1 second period. It'll take up to 1 second for the gauge to recognize that KEYIN is asserted. Then it requires at least two cycles to set the KEYIN bit, if the pin was asserted, followed by another cycle to take action. The KEYIN time isn't the time for the FET to toggle, it's the time that the gauge requires KEYIN to be asserted for state changes to occur.

0 Tom Tsao over 1 year ago in reply to Dominik Hartl11

Expert 1870 points

Hi Dominik,

Is there any chance to reduce this time?

Thanks for your reply.

+1 Dominik Hartl11 over 1 year ago in reply to Tom Tsao

TI__Guru 61906 points

No.

Power management

Power management forum

BQ78350-R1: Delay time for KEYIN toggling FET.