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Original question:

BQ34Z100-R2: EVM for BQ34Z100-R2

BQ34Z100-R2: Need support for BQ34Z100-R2 IC schematics

Murali C
Prodigy 220 points
Part Number: BQ34Z100-R2
Other Parts Discussed in Thread: EV2400, BQSTUDIO

Tool/software:

Hi

I'm using BQ34Z100-R2 as system side fuel gauge to monitor the charging and discharging current, voltage and SOC and interfacing with MCU through I2C. My battery configuration is 5S1P/ 5S2P Li-ion dumb-pack. I'm having two separate board (one- Charger board with battery and adapter connector, second - Main controller board and fuel gauge along with system). Using this fuel gauge we are using BAT- and Pack- connection with sense resistor. Here I directly connecting the BAT- from battery and Bat- is connected with SRP pin in IC and Pack- is connected with SRN. My sense resistor value is 5m ohm 3W (Since my charge current is 2A, discharge current is 15A). This pack- net is connected with charger IC GND which is also known as SYS GND. so my question are given below:

  • Can I connect the SYS ground to Pack- instead of to BAT- ? Because, I'm connecting PACK- to SYS ground. so while interfacing with MCU and Fuel gauge it can be same ground. But in EVM/schematics it is connected with Bat-.

  • Since I'm using I2C as communication to MCU (STM32H7 series). If I extracted the golden file using BQstudio with EV2400 based on charge/ discharge cycle. Do I need to use BQstudio and EV2400 board for every boards in production or simply load the golden file from MCU which is generated earlier?
  • I don't need HDQ right? since i'm using I2C.
  • I simply connect the P1, P2 to VSS if i'm not using the LEDs.

looking forward your support

Thanks 

Murali C

  • 0
    Prodigy 220 points

    In additional info:

    I'm using this fuel gauge in system side not used in battery pack. Battery is dumb pack but used this fuel gauge in system side. Since Main board (which contains the fuel gauge & MCU) and charger board (Charger IC, Adapter and Battery) is kept in distance of 1meter. so i don't want the I2C communication from battery instead of that I'm using SRP & SRN pins for 1 meter travel by keeping fuel gauge IC to MCU close. 

  • 0 in reply to Murali C
    TI__Mastermind 25855 points

    Hello,

    This question has been assigned and will be followed up when possible, in the meantime please attach your associated .log/.gg files.

    Thank you,
    Alan

  • 0 in reply to Alan Frias
    TI__Mastermind 25915 points

    Hi,

    Murali C said:
    Can I connect the SYS ground to Pack- instead of to BAT- ? Because, I'm connecting PACK- to SYS ground. so while interfacing with MCU and Fuel gauge it can be same ground. But in EVM/schematics it is connected with Bat-.

    It should be connected to BAT-.

    Murali C said:
    ince I'm using I2C as communication to MCU (STM32H7 series). If I extracted the golden file using BQstudio with EV2400 based on charge/ discharge cycle. Do I need to use BQstudio and EV2400 board for every boards in production or simply load the golden file from MCU which is generated earlier?

    you can flash the bq.fs file over i2c.

    Gauge Communication

    Murali C said:
    I don't need HDQ right? since i'm using I2C.

    no

    Murali C said:
    I simply connect the P1, P2 to VSS if i'm not using the LEDs.

    this is ok

    Regards,

    Diego