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CCS/BQ25713EVM-017: BQ25713EVM-017

Amruthanand P
Prodigy 40 points
Part Number: BQ25713EVM-017
Other Parts Discussed in Thread: BQ25713, , EV2400, BQSTUDIO

Tool/software: Code Composer Studio

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i am working on a bms system with bq25713 as charger controller. For familiarising the functionalities i have bq25713evm-017. With adaptor input, the charger is able to buck and boost the voltage as per minimum system minimum voltage() i set. but when i working with battery only and disabled adaptor input, controller not able to buck or boost the output voltage. is there any extra setting need to be done on the charger controller in order to works in battery only mode for setting in correct system voltage.  

if there is any programming document available for bq25713 controller for setting the functionality other than the datasheet.

thanks, 

  • 0
    TI__Mastermind 24075 points

    Hi Amruthanad,

    The BQstudio with EV2400 gives an easy way to play around with programming the BQ25713EVM

  • 0 in reply to Kedar Manishankar
    Prodigy 40 points

    hi,

    i am already using BQstudio. i still have my confusion. as per the documentation i perceived like, there is no extra settings need to be done for the charger to do buck or boosting the output voltage. i have used this Battery management Studio application for programming the vsys out. if you could point out the correct way to put the charger in battery only mode for boosting the load voltage will be much helpful.

    my scenario,

    i have put in 2s cell configuration, -> i am able to put battery in charging mode with setting 03/02H [i noticed that, if i did not set the watch dog timeout disabled, 03/02H register is automatically setting to zero and stopping the charging after timeout time. why is it so?].

                                                           -> i can set the load voltage by setting MinSystemVoltage(). if i set this at 8.2 volt and i give adaptor in as 5V charger able to boost to load voltage to 8.2V. i have connected 2s battery having voltage of 7v. but if i off the adaptor input, the charger is not going to battery only mode and its not boosting the load voltage to 8.2v[i am only getting 7v at the load when battery is only connected].

    i want to know that should i have to set any other configurations to make it like,

     adaptor and battery is connected and i set the vsys to 8.2V. -> if i off the adaptor the charger should automatically go to battery only mode with out as 8.2V -> if i connect adaptor input it should exit from battery only mode. the transition should be seamless.

    Thanks

  • 0 in reply to Amruthanand P
    TI__Mastermind 24075 points

    Hi Amruthanand,

       The OTG function will boost the battery voltage, and output will be seen on the VBUS pin. In Normal boost operation, the input voltage will be boosted to output. If there is no adapter, and only battery voltage is connected, there is only a FET between BAT and SYS, so you cannot boost the battery voltage to a SYS voltage, and SYS will track BAT voltage - VDS across FET between BAT and SYS.