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Bq 24232 charging circuit

Manikandan Parthasarathy
Prodigy 50 points
Other Parts Discussed in Thread: BQ24232, BQ27421-G1, BQ27621-G1, TPS3839, TPS3831

Hi,

I am currently trying to learn about bq24232 and its operations.I have a design of a portable charger. The circuit previously used 3.7 V Li-Ion battery. Should I have to cahnge anything in the circuit if I have to change it to a 3 V Lipoly battery. Kindly help me on this. Thanks.

  • 0
    TI__Guru*** 143870 points

    The bq24232 is designed to charge up to 4.2V voltage, which is the maximum charge voltage for most LiIon/Polymer batteries.  If you have a different LiPo battery that has a lower maximum charge voltage per the datasheet, you cannot use the bq24232.  Can you provide your battery's datasheet and/or part number?

  • 0 in reply to Jeff F
    Prodigy 50 points

    Hi Jeff, 

    Thanks for the reply. We are still deciding on the battery. We just thought that we could use a 3.0 V Lithium Poly battery as an option as it was small in size since the product has size constrains. I will let you know the battery information soon. But right now we are facing another problem with the circuit. We have a circuit for portable battery charger with bq24232 IC in it.  Now we want to display the battery level of the product when plugged in to wall socKet or mobile phone. Could you please provide with any ideas. The operation to be achieved is to indicate the battery level in a RGB led light. Any ideas are appreciated. Thanks in Advance.

     

  • 0 in reply to Manikandan Parthasarathy
    TI__Guru*** 143870 points

    We typically recommend a separate battery gas gauge IC, like bq27421-g1 or bq27621-g1, to report on battery charge status.  Both require I2C communication.  Do you have I2C comms available?

  • 0 in reply to Jeff F
    Prodigy 50 points

    We do not have I2C comms available.

  • 0 in reply to Manikandan Parthasarathy
    TI__Guru*** 143870 points

    All of our single cell gas gauges have either I2C or HDQ communication requirements.  You might be able to use multiple tps3831 or tps3839 SVS ICs (comparator + reference) to monitor the battery voltage and have the output go high the battery voltage rises above the threshold.   

  • 0 in reply to Jeff F
    Prodigy 50 points

    Hi I have finished the schematics in Eagle and I am trying to simulate the circuit using pspice or Matlab Simulinx. I am finding it hard to locate the library for bq24232. Can you kindly help me in guiding me where that would be available?

  • 0 in reply to Manikandan Parthasarathy
    TI__Guru*** 143870 points

    Unfortunately, we do not offer simulation Pspice or Simulinx models of the bq24232.

  • 0 in reply to Jeff F
    Prodigy 50 points

    In that case what would be the alternative solution for testing it other than using the bread board? If any possible alternatives are available, it would be of great help for us as there is no sample ICs available for BQ24232RGTTG4

  • 0 in reply to Manikandan Parthasarathy
    TI__Guru*** 143870 points

    There are non-G4 sample ICs available and they will perform identical to the G4 ICs.  Can you order some of the non-G4 samples?

    The explanation of the difference is below:

    Green Conversions: Beginning June 1, 2004, TI will change the "e" in the Pb-free finish category to a "G" when a TI device/package combination converts to a "Green" mold compound. For example, a TI device built with NiPdAu finish will have a Pb-free finish category of "e4" until a green mold compound is implemented. When implemented, the Pb-Free finish category will be changed to "G4". (Replacement of the "e" with a "G" in the Pb-Free finish category is not part of the J-STD-609 standard at this time, but will be implemented for TI products.) "G3" category is "E3" matte tin (Sn) Pb-free finish with "Green" mold compound.