BQ25120 Issue

Hi,

I know this post is one month old but Jerry have you got any idea how to disable the watchdog timer?

From my device, what I did was that, when only powering the device by a battery, I put the device in active mode (by CD pin), change the SYS output voltage and put the device back in Hi_Z mode. In this case, the watchdog timer did not reset the registers and the SYS voltage did not change. If I keep the device in active mode, then the timer resets the registers.

Hope this helps.

-Vala

Vala,

There is not a way to disable watchdog timer on the BQ25120. Polling the device every 30s or so will make sure that the watchdog is not reset. 

if you are using the BQStudio- i would recommend to use the Autoread function. 

We are considering a watchdog disable spin of the BQ25120 in the future which is an OTP setting. (one time programmmable- similar to firmware)

regards,

gautham

I would suggest just making the WDT more flexible; give it an EN bit and a configurable time period. And don't auto stop it in Hi-Z, it is still a useful feature when a charger is not present.