NiMH - LTC4015 battery charger

I would like to use LTC4015 battery charger to charge a Nickel–metal hydride battery.

1) is this IC can support charging NiMH chemistry.

2) NiMH batteries nominally operate at 1.2 V per cell, do I need stacked cells (three cells = 3.6V) to be able to use the charger. 

Thank you in advance

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  • 0
    •  Analog Employees 
    on Apr 13, 2018 9:22 PM

    Hello,

    LTC4015 does not support NiMH.

    It is theoretically plausible that it could be used to do this, but it would need to be set up to think it is charging an LiFePO4 battery in order to get the 3.6V target voltage. Also, bear in mind that the LTC4015 does not support the termination methods recommended for charging NiMH batteries. That said, the LTC4015 has a powerful telemetry system that could possibly be used to manually control the charging. For example, a processor monitoring the LTC4015's battery voltage and temperature measurements could manually implement negative delta v or delta temperature termination. However, all of this would be left up to the user to design and test safely.

    So, to summarize, NiMH is not supported but it seems like it could possibly be done manually if implemented carefully. It would be absolutely necessary to use a microcontroller in order to make it work properly.

    Regards,

    Zack

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  • 0
    •  Analog Employees 
    on Apr 13, 2018 9:22 PM

    Hello,

    LTC4015 does not support NiMH.

    It is theoretically plausible that it could be used to do this, but it would need to be set up to think it is charging an LiFePO4 battery in order to get the 3.6V target voltage. Also, bear in mind that the LTC4015 does not support the termination methods recommended for charging NiMH batteries. That said, the LTC4015 has a powerful telemetry system that could possibly be used to manually control the charging. For example, a processor monitoring the LTC4015's battery voltage and temperature measurements could manually implement negative delta v or delta temperature termination. However, all of this would be left up to the user to design and test safely.

    So, to summarize, NiMH is not supported but it seems like it could possibly be done manually if implemented carefully. It would be absolutely necessary to use a microcontroller in order to make it work properly.

    Regards,

    Zack

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