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Original question:

BQ25703A: Register setting or configuration

BQ25703A: Battery Charge Discharge Register Configuration

khemraj suthar
Prodigy 170 points
Part Number: BQ25703A
Other Parts Discussed in Thread: BQ34110

Hello Support Team,

We are using BQ25703A in our design and we are not able to get the proper data for the battery charge current and discharge current by reading the registers 28h (7 bit output of discharge current) and 29h (7-bit output of battery charge current).

We are using the BQ34110 fuel gauge in design and we are getting the proper update in its registers. However, in the battery charger 28h and 29h registers are not updating during the charge and discharge current. Can you please let us know how we can enable these registers to read the battery charger data.

Regards,

Khemraj

  • 0
    TI__Expert 5330 points

    Hi Khemraj,

    Please begin by taking the device of low power mode whenever you will be accessing the ADC.  This is done via bit [15] of register 0x0, charge option 0 register.

    Next, you need to set the ADC configuration register, 0x3A.  You can enable the ADC channels that you would like to read (bits [7:0]), set the ADC to read either once or continually every 1 second (bit [15]) .  Finally, you need to write the "start bit" in order to start the ADC converting either once or continually.  For instance, to set the ADC to read every channel once, you can write the value 0x40FF.

    The values for any channel that you selected should then be available in their corresponding register.

    Regards,

    Steve