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constant voltage current limiting float boost type battery charger for lead acid battery

Vignesh Thandavamoorthi
Prodigy 10 points
Other Parts Discussed in Thread: PMP10110

Hi,

we require design for below requirement

1.constant voltage current limiting float boost type battery charger for lead acid battery

2. It should operate with input voltage variation 185 V to 300 V AC.

3.The charger should be capable of carrying 10 Amp continuously. Once the output current exceeds 5Amps the charger shall change over to boost mode. Float voltage will be adjusted to 26 to 26.5VDC and the boost mode voltage shall be adjusted to 26.8 to 27.5VDC. Upon reduction in charging current less than 5 Amps the charger shall change over back to float mode. The charger should be able to deliver the output at 0.1C20 rate.

4. There shall be potential free contact of change over type (C-NO-NC) which will be used as Charger fail or DC fail for remote indications. The contact rating of this contact shall be 2 Amps 24VDC. 

Please suggest for some reference design or IC which support the above requirements.

Thanks 

Gouthami Mannem

  • 0
    TI__Mastermind 25800 points
    Hey Vignesh,

    While I wasn't able to directly find a single IC that supports your design, I was able to find a couple of TI-Designs (reference designs) that does something similar to what you wanted.

    230-V, 400-W, 92% High Efficiency Battery Charger With PFC and LLC for 36-V Power Tools Reference Design
    www.ti.com/.../TIDA-00355
    www.ti.com/.../tidu789b.pdf

    You will need an external MCU for this design to implement your particular charge profile. You may also have to change some components to optimize for efficiency any meet your 10A requirement.

    Universal AC Input to 30Vmax@6A Lead-acid Battery Charger Reference Design with PFC
    www.ti.com/.../PMP10110

    There are four versions of this, each with different input, output, and power capabilities, so a combination of designs may be of use.


    This was all I could find, and hopefully this puts you on the right track.


    Regards,
    Joel H
  • 0 in reply to Joel Hernandez II
    Expert 1565 points
    Hi Joel,
    I am looking to understand the circuit operation in PMP10110. Do you have that described in detail anywhere (what each circuit section and component does, etc.)?

    Regards,
    Nitish