BQ25700A: Battery charging process

Hi Khalid,

Thanks for your reply.

Best regards

Lillian

Hi Khalid，

Can you provide me with the value of trickle current?  

Thanks 

Best regards

Lillian Liu

Hi Lillian,

There is no specific trickle charge current for this charger. The customer can program it. The pre-charge current is limited to 384mA:

During pre-charge, BATFET works in linear mode or LDO mode (default REG0x12[2] = 1). For 2-4 cell battery,
the system is regulated at minimum system voltage in REG0x3E() and the pre-charge current is clamped at 384
mA. For 1 cell battery, the pre-charge to fast charge threshold is 3 V, and the pre-charge current is clamped at
384 mA. However, the BATFET stays in LDO mode operation till battery voltage is above minimum system
voltage (~3.6 V). During battery voltage from 3 V to 3.6 V, the fast charge current is clamped at 2 A.

Thanks,
Khalid

Hi Khaild,

Thanks for your reply.

In addition, I want to know the termination current value? or it uses watchdog timer to terminate charging?

Thanks 

Lillian  

Hi, Lillian,

There is no termination current register on this part. It depends on the host controller to terminate charging by issuing a command such as CHARGE_INHIBIT. 

Regards,

Tiger

Hi Tiger,

Thanks for your reply, I got it!

Best regards

Lillian