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Charger IC for 7V 1800mAH NiMH battery

Jerry Chen
Expert 5110 points
Other Parts Discussed in Thread: BQ2000

My customer is thinking about integrating the charger in their interphone, they don’t have any ideas about the detailed function, so they require a common use 7V 1800mAH NiMH battery charger. Could you recommend some parts? I have learned Bq2000/2002, but they are external switch solution. Does TI have any integrated switch and easy use parts for this application? Thank you!

  • 0
    TI__Mastermind 31120 points

    TI does not have any integrated FETs for Nickel application.

    Once could use a part like the bq2412x family (Li-Ion) and use the CE pin to enable and disable charge, if you have a micro that can determine when to charge and terminate.

    This would work since it has a CC then CV charge mode....one would set the regulation higher that the cells would reach so the charger would stay in the CC mode until the processor tells it to terminate.

  • 0 in reply to Charles Mauney
    TI__Expert 5110 points

    Charles Mauney said:

    TI does not have any integrated FETs for Nickel application.

    Once could use a part like the bq2412x family (Li-Ion) and use the CE pin to enable and disable charge, if you have a micro that can determine when to charge and terminate.

    This would work since it has a CC then CV charge mode....one would set the regulation higher that the cells would reach so the charger would stay in the CC mode until the processor tells it to terminate.

    Thank you Charles! Have you heared of other companies' solution which would be easy use? I want to make a comparison. The customer is using our OMAP in their handset. I'm thinking about using omap plus driver and Mosfet to realize a digital PWM control charger. How do you think of this solution?

  • 0 in reply to Jerry Chen
    TI__Mastermind 31120 points

    You can check out LTC or Maxim