ADP5350 battery charging issue

Hi,

You may need update the internal battery resistance through 0x19 to 0x1E to match with your battery. The default value is 2ohm that is too large and may impact the SOC. Please also check the 0x1F value. 

BRs,

Kevin

Hello,

It seems the charge is working well with the value of 0x1E.

However, I wonder why this value is working because the internal resistance of the battery I am using is only 260 milliohm.

Could you please explain more?

Regards,

Dat

Hi Dat,

Would you show the setting for 0x19 to 0x1E?

BRs,

Kevin

Hi Dat,

Would you show the setting for 0x19 to 0x1E?

BRs,

Kevin

Hello Kevin,

All regs from 0x19 to 0x1E are set to 0x1F.

Regards,

Dat

Hi Dat,

If you use the larger battery resistance, the ADP5350 will get a lower battery level during the fuel gauge calculation.

BRs,

Kevin

Hello Kevin,

If I set the resistance to 260miliohm, when the battery level returned from fuel gauge is about 16-20%, my device will be unexpectedly turned off due to power loss.

This is strange.

Regards,

Dat

Hi Dat,

You can refer to page 27 in the datasheet. VBAT = VBSNS + RBAT × IBAT

So if you use a large RBAT, the VBAT will be higher so it will turn off later.

BRs,

Kevin