BQ25710: BQ25710 input current limit

Hi Star,

Can you send the register values when this is happening? 

You can do this on BQStudio.

What is the customer's input voltage, battery voltage, and ISYS load?

Thanks,

Peng

Hi Peng

Thanks for your reply.

Attached the schematic.

* Created: Fri Feb 24 09:40:09 CST 2023
*
* Format: Register Name  tab Character,\t  Hexadecimal register value.
* Device: bq25710
* BQZ Container: Charger_1_00-bq25710.bqz
*
Charge Option 0	071F
Charge Current Register	0BC0
Charge Voltage Register	3328
OTG Voltage Register	0000
OTG Current Register	0000
Input Voltage Register	0580
Minimum System Voltage	2400
Input Current Register	7F00
Charge Status Register	8000
Prochot Status Register	A800
Input Current Limit In Use	7F00
VBUS and PSYS Voltage Read Back	9100
Charge and Discharge Current Read Back	0000
Input Current and CMPIN Voltage Read Back	0000
System and Battery Voltage Read Back	6301
Manufacture ID Read Back	0040
Device ID Read Back	0089
Charge Option 1	0250
Charge Option 2	021D
Charge Option 3	0000
Prochot Option 0	4A65
Prochot Option 1	81A0
ADC Option	A05F
LOUT	0004

1, Debugging found that the setting of Bit[4:3] (IL_AVG) of the register ChargeOption3 has an impact on the input current limit.

I used to set it to 0-6A. Now after adjusting IL_AVG to 15A, the input current limit is normal. Will the setting of IL_AVG affect the current limit of the device?

2, If I need a larger input current, the RSNS_RAC is set to 10 mΩ in the software, and the actual resistance is 5 mΩ. Is this method feasible?

3, The input voltage is 12V and 19V, but our motherboard is designed to meet the power of 9-22V adapter, and the power of the motherboard is 100W when it is running at full power. The battery is 3 series, and the minimum voltage of the system is set to 9V, but the battery is not connected at the test stage.

Waiting for your reply.

Thanks

Star