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Single Cell Lead Acid Battery Charger IC

RAJAN KS
Prodigy 40 points
Other Parts Discussed in Thread: BQ24130, BQ24650

Dear sir,

We are in the process of developing a Single Cell Lead Acid Battery Charger for one of our project requirement. 

The brief requirement of charger is given below.

Charger Input voltage :  3.3V DC

Charger Output Voltage :  3V DC

Charge current Max :   3 Amps

Cell specification :

    Nominal Voltage : 2.1 V

    Float Voltage : 2.30 V

Can you please suggest a suitable Charger IC for the above requirement please?.

Thanks

with regards,

K.S.Rajan

Chief Executive

Embit Technologies,

Bengaluru

Email:  embit.tech@gmail.com

  • 0
    TI__Guru 56650 points
    K.S. Rajan:

    The 3A charger current requires a switching charger. But, the 3.3V input voltage is too low for our charger and FET's gate drive signal. Would you increase the input voltage to 5V.
  • 0 in reply to Wang5577
    Prodigy 40 points
    Dear Wang Li,
    Greetings...

    Thanks for your support.
    We can increase the input voltage to 5V. Can you please suggest us a suitable charger IC to meet our charger requirement?

    Also can you please provide us an application note on how to use the charger IC?

    Thanks
    with warm regards,
    K.S.Rajan
    Chief Executive
    Embit Technologies,
    Bengaluru
    Email: embit.tech@gmail.com
  • 0 in reply to RAJAN KS
    TI__Guru 56650 points
    K.S.Rajan:

    Please check BQ24130 to see if it can meet your requirement or not.
    www.ti.com/.../bq24130.pdf

    Also, there is an application note talking about using STAT pin to change the Lead acid battery charge voltage setting.
    Using the bq24650 to Charge a Sealed, Lead-Acid Battery (Rev. A) www.ti.com/lit/an/slva437a/slva437a.pdf
  • 0 in reply to Wang5577
    Prodigy 40 points
    Dear sir,
    Thanks for the wonderful support. We are proceeding with your suggestion for using BQ24650 in our charger design.
    Thanks
    with warm regards,
    K.S.Rajan
    Chief Executive
    Embit Technologies,
    Bengaluru