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BQ4050: Regarding the low-power consumption issue of bq4050 in sleep mode

Javen King
Prodigy 10 points
Part Number: BQ4050

Tool/software:

I have looked through the specifications of the BQ4050 and found that the current consumption in sleep mode (CHG OFF, DSG ON) is 75uA. Is this current the lowest power consumption of the chip itself? Because I have noticed that the circuit in normal operation generates periodic pulse currents, and actual measurements using a multimeter show that the total circuit current is at a minimum of 90uA, averaging around 115uA. My circuit is designed based on the reference circuit provided for the chip. Can I further reduce this power consumption to be closer to 75uA, or even infinitely close to 75uA?tks！

  • 0
    TI__Mastermind 37761 points

    Hey Javen,

    The value we have on the datasheet is a typical value. The lowest power consumption is when the gauge is in shutdown with a typical power consumption of 1.6 microamps. There are many different variables that could cause higher power consumption including leakage current and other devices in the circuit.

    Regards,

    Nick Richards

  • 0 in reply to Adrian
    Prodigy 10 points

    hi Nick Rocardo，thanks for your reply！

    We do not want to enter the shutdown mode because communication is not possible in that mode. Additionally, I would like to know if the current we are getting from the test can be further reduced by changing the design of the peripheral circuitry. Or, is the current value we have now already considered normal?

  • 0 in reply to Javen King
    TI__Mastermind 37761 points

    Hey Javen,

    You can test new designs with different peripheral circuitry to see if there are better results, I can not give you a definite answer on that.

    The current consumption you are seeing is not too high, so I think the chip is not defective.

    Regards,

    Nick Richards