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BQ24401: BQ24401: Charge Parameters

W_ilson
Intellectual 1820 points
Part Number: BQ24401
Other Parts Discussed in Thread: BQ2002

Hi Team,

I've been looking at the BQ24401 and have a few questions:

  1. What is the maximum charge current this part can supply a NiMH battery?
  2. What is the part's quiescent current draw when a battery is fully charged?
  3. What is the max number of cells this part can support?

Best Regards,

Michael

  • 0
    TI__Guru 56650 points
    bq24401 is a charger controller. The datasheet typical application support 1A. It is non-synchronize switching converter, I would think 1A is a good range.
    bq24401 is a legacy part and doesn't have quiescent current data.
    bq24401 is a charger controller with resistor divider to sense the output voltage. So, I would say it can support any cell you want.
  • 0 in reply to Wang5577
    TI__Intellectual 1820 points

    Hi Wang5577,

    With this information, it doesn't seem that the bq24401 is a device we want to use. Do you have recommendations for a battery charger for a single cell NiMH battery? This is an extremely simple application, but Iq is a concern.

  • 0 in reply to W_ilson
    TI__Guru 56650 points
    bq24401 was released long time ago. Iq parameter may not be available. What type Iq (input or output at what condition) and value are this application trying to meet? I would think linear charger, bq2002, could have a lower quiescent from the input source because it doesn't have the gate drive loss.