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UCC28881: 12V Battery Charger

Lonnie Hortman
Prodigy 10 points
Part Number: UCC28881
Other Parts Discussed in Thread: TIDA-00200

I have a design that comes from  WEBENCH with the following parameters: VinMin = 90, VinMax = 400, Vout = 13.6, Iout = 200ma. I want to use the circuit to charge a small 12V 1.3A battery.  Any special requirements to use the circuit as a charger?

  • 0
    TI__Expert 8210 points
    Lonnie

    The maximum output current for UCC28881 is 225mA. It also does not have the ability to regulate both constant voltage and constant current CV/CC. If these limitations are ok then UCC28881 can work for your application.

    Regards,
    Eric
  • 0
    TI__Mastermind 26735 points
    Hi Lonnie,

    Thanks for your interest in UCC28881. Given the wide input voltage range, a flyback configuration would be suitable. You will need two control loops, one to set maximum charging current, the other to set maximum output voltage. For reference, take a look at TIDA-00200. This is a 200W interleaved flyback charger. It's a little higher power range than you are planning to work with but you can use it as a reference for designing your control loops:www.ti.com/.../tidra05.pdf

    Best Regards,
    Ben Lough