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BQ76PL455A-Q1: bq76PL455A-Q1

Oscar Abega
Prodigy 90 points
Part Number: BQ76PL455A-Q1
Other Parts Discussed in Thread: EMB1499Q, BQ40Z80, BQ76PL455A

Hallo every one

I'm in project and the project is to design a battery management system with an active cell balancing an gas gauging, for that I've choose the solution    EMB1428+EMB1499Q+bq76PL455A-Q1 but for the gas gauge i retain the BQ40Z80 and i found out that the BQ40Z80 also has monitoring function and protection since i have to deal with one LiPO battery is it  just replace the bq76PL455A-Q1 by  BQ40Z80 ? if yes what is the  ad vantage or inconvenient using them

second point can i use the GPIO of bq76PL455A-Q1 to command LED (Battery charge's status ) ? what is

  • 0
    TI__Genius 17370 points

    Hi Oscar,

    If you only have one cell in series at low voltage and if the specs of the bq40z80 meet your requirements then that may be a better option. The bq76pl455a allows for stacking up to very high voltage battery packs especially for EV/ESS applications (each IC can monitor 16 cells) and allowing higher cell balancing current with external FETs or with the active balancing solution as you mention. However, you will need a higher minimum voltage to power the bq76pl455a device so if you only have one cell this may not be the way to go. Let me know if you have any specific concerns.

    Regards,

    Taylor

  • 0 in reply to Taylor Vogt
    Prodigy 90 points

    Hi Taylor,

    I have a LiPo  6 series cells as it is mention in the specification of bq40z80 it can monitor up to 7 cell and has a good gas gauge specification  i thought that i could be a good idea to use it with the active cell balancing if the 6s are problematic is it another Ic like bq76pl455a with integrated gasgauge ? the project concern a rescue robot that need constant current of 40A an  i need to manage two batteries simultaneously mean two smart Batteries and charger.

    Kind regard

    Oscar 

  • 0 in reply to Oscar Abega
    TI__Genius 17370 points

    Hi Oscar,

    Typically the active cell balancing solution is more complex/expensive so we see higher trends towards passive cell balancing (you can use external ckt to accomplish higher current with both devices). The 455 is separate from gauge/charger and is only a monitor, also we offer the bq79606a which is a 6 cell monitor/protector with integrated passive balancing up to 150mA. It sounds like if you need the gauging aspect, then you may want more details on the bq40z80. I suggest reading the datasheet specs or posting another E2E post tagging that part# instead of the 455 so the appropriate support team will be able to help.

    Regards,

    Taylor