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BQ2970: BQ2970

tarun anand
Prodigy 80 points

Part Number: BQ2970
Other Parts Discussed in Thread: TPS63900, TMP303

Tool/software:


Hello, 


We need to certify our design as intrinsic safe design. Battery will not be charged 

Can you please review the flow, so we can proceed with schematics?

Requirements

130c operation

Powered with 3.7V lithium battery 1000mAh
Controlled through Stm 32 processor with BLE
Have Vibrometer sensor

Protections looking for
Overvoltage, overcurrent, and thermal protection to prevent excess energy discharge that could lead to ignition in hazardous environments.
Fuse or PTC for current protection to prevent accidental short circuits or uncontrolled discharge in integrated in the final design.

Currently using

0805L035YR Fuse

BQ2970 Battery protector

TPS63900 Buck-Boost converter



Regards
Tarun
1185.Power Management.pdf

  • 0
    TI__Mastermind 42070 points

    Hello Tarun,

    For the other devices, I would recommend you open a new thread.

    For the BQ297x, I see you mention that it needs to function @ 130degC. This device will not be able to function in this case and we do not currently have any single-cell device that can reach these temperatures.

    Best Regards,

    Luis Hernandez Salomon

  • 0 in reply to Luis H. S.
    Prodigy 80 points

    Hello Luis Hernandez Salomon,

     Thank You for repl.

    Can BQ297x  provide Overvoltage, overcurrent, and thermal protection to prevent excess energy discharge that could lead to ignition in hazardous environments.
    Fuse or PTC for current protection to prevent accidental short circuits or uncontrolled discharge in integrated in the final design.

    If we are operating at 85c operation.

    Regards
    Tarun

  • 0 in reply to tarun anand
    TI__Mastermind 42070 points

    Tarun,

    Thermal protections would not be possible with this device. All else could be implemented.

    You could use the BQ298x device family with a TMP303 to implement temperature protections however.

    Best Regards,

    Luis Hernandez Salomon