BQ24133: IF I Pull the TTC to LOW to disable the charge termination and safety timer,which condition the charge will stop

Hi Angelo

As I know TTC pull low will disable charge termination 

May I know

1. How BQ24133 can know charge complete? as I know if enable TTC ,BQ24133 will indicate charge complete when charge current below the termination current setting 

2. When battery charge complete ,the charger will keep charging or not? 

Thanks

Hi Kai,

1. The bq24133 detects termination/charge completion when the SRN voltage is higher than recharge threshold and the charge current is less than the termination current threshold, as described in Section 9.3.5. This is true regardless of whether TTC is enabled or disabled. The difference is that when TTC is enabled, then charge termination and the safety timer are active and can also cause termination.

2. When charging is complete, the charger enters termination and does not keep charging. The discharge current once termination is detected is only about 2 mA.

Hope this clears things up!

Best Regards,

Angelo Zhang

Applications Engineer | Battery Charging Products

HI Angelo 

Thanks for your reply 

But I have confused ,May I know what's disable charge termination mean?

TTC to GND => Disable charge termination 

TTC to VREF => Allow charge termination