BQ25155EVM: Watchdogs

Riccardo Gaiati

Prodigy 70 points

Part Number: BQ25155EVM
Other Parts Discussed in Thread: BQ25155

Hi,

I have questions about some watchdog defined for the device BQ25155.

In the chapter 8.3.2.2 Safety Timer and I 2C Watchdog Timer of the document bq25155.pdf, this is reported:

Can you kindly indicated which is the I2C register where the watchdog can be enabled-disabled ?

2. Does t_{WATCHDOG_SW}refer to the above mentioned watchdog ? Can you explain the significant range 25 -50 seconds ?

Thanks in advance for your kind support.

Riccardo Gaiati

over 4 years ago

0 Riccardo Gaiati over 4 years ago

Prodigy 70 points

Hi,

I found in the document bq25155.pdf the register where it is possible to enable or disable the watchdog.

8.5.1.17 CHARGERCTRL0 Register (Address = 0x17)

Nevertheless, why the indication of min 25 and typical 50 seconds in the Timing Requirements ?

+1 Arelis Guerrero over 4 years ago in reply to Riccardo Gaiati

TI__Expert 5645 points

Hi Riccardo,

Yes, the watchdog can be enable/disable on that register. There is a 50-second watchdog, the 25s is the minimum spec considering possible variations across devices and temperatures.

Regards,

Arelis G. Guerrero

0 Riccardo Gaiati over 4 years ago in reply to Arelis Guerrero

Prodigy 70 points

Hi Arelis,

thanks for the explanation.

I will close the issue.

Kind regards

Riccardo

Power management

Power management forum

BQ25155EVM: Watchdogs