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BQ4050: Few questions about BQ4050 fuel gauge

Mammadagha Shamurov
Prodigy 40 points
Part Number: BQ4050
Other Parts Discussed in Thread: TIDA-00982

Tool/software:

Hello,

I have been working with the BQ4050 fuel gauge and came across a few questions I hope you can help me with. I apologize in advance for the fact that they are somewhat unrelated:

  1. The TIDA-00982 reference schematic for the BQ4050 fuel gauge mentions "for non-military drones." Is there a version of the BQ4050 designed specifically for military applications?

  2. The reference schematic includes a charger controller, but I plan to use an external charger for the battery. Do I need to include a connector for the charger to connect to the pack’s + input? What additional considerations should I keep in mind?

  3. Is the BQ4050 more suitable as a pack-side or system-side fuel gauge? Do you have any recommendations for system-side fuel gauges?

I appreciate any advice or insights you can provide. Thank you for your assistance!

  • +1
    TI__Mastermind 28480 points

    Hello,

    Mammadagha Shamurov said:
    The TIDA-00982 reference schematic for the BQ4050 fuel gauge mentions "for non-military drones." Is there a version of the BQ4050 designed specifically for military applications?

    There is not a specific version of bq4050 for military application.

    Mammadagha Shamurov said:
    The reference schematic includes a charger controller, but I plan to use an external charger for the battery. Do I need to include a connector for the charger to connect to the pack’s + input? What additional considerations should I keep in mind?

    Yes, the charger would have to connect to the PACK+/PACK- side of the gauge system. Please ensure that the proper ESD mitigation is being used when adding the connector.

    Mammadagha Shamurov said:
    Is the BQ4050 more suitable as a pack-side or system-side fuel gauge? Do you have any recommendations for system-side fuel gauges?

    I believe this is more suitable as a pack-side gauge since this allows the device to always be connected to the cells, allowing for the gauge to become as accurate as possible as it learns over time.

    Regards,

    Anthony Baldino

  • 0 in reply to Anthony
    Prodigy 40 points

    Hi Anthony, I have submitted your answer as a solution but I have one more question. Can I use the Pack+/Pack- XT60 connector also as my charger input, or should I add another connector? 

    thank you.

  • 0 in reply to Mammadagha Shamurov
    TI__Mastermind 28480 points

    Hello,

    I see in the reference design the XT-60 connector is being used, so I believe this should be fine as long as the correct precautions are taken on the charger side.

    Regards,

    Anthony Baldino