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Original question:

bq34z100 JEITA compliance and Management Data Register (ChargeVoltage & ChargeCurrent)?

BQ34Z100-G1: bq34z100 JEITA compliance and Management Data: ChargeCurrent?

BatMan
Expert 1232 points
Part Number: BQ34Z100-G1
Other Parts Discussed in Thread: BQ34Z100

Hello again,

Three questions relative to the Charge Current value:

In the Bq34z100-g1 spec , aka SLUSB75B Revised July 2016

It shows the units of measure for the Charge Current T1-T2  (and T2-T3, T3-T4) in percent.

1) Shouldn't that be mA instead of percent?

2) Is this the identical value that  "ChargeCurrent()" returns? I would expect mA, or does it just return whatever value I assign?

3) Is this value used in any way in the impedance tracking algorithm or it just for user/programmer reference?

-Tim

  • 0
    TI__Expert 4640 points
    Hi Tim,

    1) The percent is based on your design capacity, so this is meant to allow a customer that wants to follow a JEITA standard of charging with any other type of battery chemistry.

    2) Yes this would be the identical value that Charge Current returns but in mA based on your design capacity.

    3) Yes this is used by the bq34z100 IT algorithm to then determine if the battery has reached charge termination and set the FC bit and therefore have the host notified that they should command their charger to stop charging.

    Thanks

    Miguel
  • 0 in reply to Miguel Angel Rios
    Expert 1232 points

    thank you very much!