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BQ2000: Recharge of 2 NiMH cells via USB port

Part Number: BQ2000

Hi,

I have to design a charger for two NiMH cells connected in series. Charging takes place via the USB port.
The questions are only the following:

1) Is the BQ2000 driver able to detect non-rechargeable alkaline batteries and then automatically suspend the charge? At the moment the only device that declares it on the datasheet is the Maxim DS2712.

2) Is there a driver for charging NiMH batteries that integrates the USB BC1.2 standard? I ask because the device I have to design, if connected to the PC, limits the charging current to 500mA, if connected to a charger it limits the current to 1A.

I hope I've been exhaustive.

Regards,
D. Facchini

  • Hello,

    1. I am confused, why would you put a non-rechargeable battery into a battery charger?

    2. Please see the attached Application Note on charging NiMH batteries. Can you please provide more details about the features that you are looking for so I can try to find a charger that can be used with the below scheme?

    https://www.ti.com/lit/an/slua843/slua843.pdf

    Thanks,

    Mike Emanuel

  • Hi,

    The apparatus that I have to design will have a compartment where it will be possible to enter both Alkaline AA battery and rechargeable NiMH batteries.
    This apparatus will have a USB Type C port to make the data connection with the PC and I would like to avoid damage if the user used Alkaline batteries.

    This automatic recognition function is fundamental for this application, there are drives who integrate it?

    Regards,

    D. Facchini

  • Hello,

    The BQ2000 does not detect if the battery is rechargeable or not. As such, you will need to design a system where only rechargeable batteries are connected to the battery charger and non-rechargeable batteries are not. Alternatively, you will have to create some circuit, logic, or user input to connect the charger to rechargeable batteries only.

    Thanks,

    Mike Emanuel

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