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BQ24190 is not charging the Battery

Chithambara Ganesh
Prodigy 80 points
Other Parts Discussed in Thread: BQ24190

Hi,

I am facing issue with BQ24190 Battery charger. I am setting the following register values & getting REG08 content as charger port is detected (USB host/ Adapter Port) but it is not charging. And fault register values is 0x00 only.

Even sometimes it is showing the battery is charging, but at that time the current is not entering to battery.And the charger also not getting detected.

What will be the issue? can you please help us,

REG NAME DESCRIPTION REG VALUE REG VALUE NOTES
REG00 Input votlage limit - 5V and Input Current limit 1.5A 0X75 0X75 0x05
REG01 Charge Battery, System Voltage limit - 3.7V,  0X1F 0X1F 0x11
REG02 Charge Currnent - 2A 0X60 0X60 0x60
REG03 Precharge - 256mA; Charge termination - 128mA 0X10 0X10 0x10
REG04 Charge Voltage Limit: 4.192 0XAE 0XAE 0xb0
REG05 Watch dog timer disabled 0X8A 0X0A 0x0a
REG06 Default 0X03 0X03 0x03
REG07 Default 0X4B 0X4B 0x4b or 0xcb
REG08 2d 2d 0x44/0x84 REGISTER VALUES AFTER SETTING REG[0:7]
REG09 0 0 0x00
REG0A 23 23 0x23

Waiting for your faster reply,

With thanks,

Ganesh.

  • 0
    TI__Expert 3160 points

    Ganesh, 

    REG08 (System Status Register) shows that you are in DPM regulation. Please try lowering REG00 [3:6] from 5.0V to the default value of 4.36V (0110).

    Let me know if that helps!

    Thanks,

    Rachel 

  • 0 in reply to Rachel Moore
    Prodigy 80 points

    Hi Rachel, 

    Thanx for your fast reply. I have already tried with default register setting, but it is not getting charged. After that I have tried with setting minimum DPM value also ( by setting REG00 as 0x05) then also it is not charging.

    Regards,

    Ganesh. 

  • 0 in reply to Chithambara Ganesh
    TI__Expert 3160 points

    Ganesh, 

    Using default register settings (except for disable watchdog), can you please confirm what value you read for registers 0x08 and 0x09?

    In you previous post the values you show indicated a status of "power not good" and "unknown adapter" both of which will cause the device to be unable to charge:

    Also if you can provide the following information it will help:

    • What is your battery voltage? Vbus Voltage? 
      • Please measure the VBAT and VBUS voltages using the EVM Test points (or close to the device is using a custom board
    • Are you using an actual battery, or simulated?
    • Are you using an actual adapter (USB?) or power supply for VBUS?
    • Conduct this test with no System load if possible

     

    Thanks!

    Rachel