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Original question:

BQ24773: Individual Cell Balancing in a 4 cell pack and State of Charge(SOC) monitoring

BQ24773: learn mode function

Radel Design Team
Intellectual 460 points
Part Number: BQ24773

Dear Sir,


We are intending to use the BQ24773 in a portable electronic equipment for Battery Management.

Brief details of the Project is mentioned below:

1)Input to BQ24773: 18V to 22V
2)Type of Battery:3 Li-Ion battery pack 
3)System Voltage: 12V to 14V
4)Max. System current: 2A
5)Max. Battery Charging current: 2A


The queries regarding this IC are:

1. what is the significance/function of learn mode in the IC.

2. when learn mode is enabled, the battery discharges completely but it does not start to charge once it is depleted below threshold. should the adapter be reconnected in order to charge the battery.

looking forward for your response.

with regards,

Yashaswini 

  • 0
    TI__Genius 16185 points

    Yashaswini,

    Based on your question, below is my suggestion.

    Q1: In general, the learn mode purpose is for gauge calibration and then it should be more accuracy in checking battery capacity dropping and its life cycle . The learn mode is requested by lap top application

    Q2: when learn mode enable, the battery will discharge until battery voltage is lower than min system voltage. Then BQ24773 will enable charge again. Battery won't discharge completely. please check below table to know default value MinSystemVoltage data.

    Thanks