BQ24040: About safety timer

Tsukui Yusuke

Guru 21930 points

Part Number: BQ24040

Hi,

I read the following post and had a question.
https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1029798/bq24040-temp-fault

If TEMP FAULT occurs, will the safety timer continue?

Charging stops when TEMP FAULT occurs.
However, if TEMP FAULT continues, the system will not be able to catch the flag.
Therefore, I expect the safety timer count to continue.

Best regards,
Yusuke

0 Nick Brylski over 4 years ago

Hello Yusuke,

When charging is stopped due to TS fault the safety timer is suspended. Once the TS voltage returns to normal range the timer continues.

For the cool region (1/2 charge) fault the timer is slowed by 50%.

Best regards,

Nick

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