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TIDA-00355: Extending the input range of this battery charger design

Kareem Moulana
Intellectual 2480 points
Part Number: TIDA-00355
Other Parts Discussed in Thread: UCC28180, UCC28722

Hi team,

I am interested in TIDA-00355 for a battery charger design.  I'm looking for a 400-500W Lead Acid battery charger design with an output of about 24V.

It fits all my requirements except that the input voltage range is too narrow.  I need to support 90-260V, and the design only supports a Vin down to 175V.

Is it possible to tweak this design to support my Vin range?  What would I have to change?

Thanks,

Kareem

  • 0
    TI__Mastermind 31580 points
    Hi Kareem,

    I have asked one of our applications engineers to respond to your post. You should see a response later today.

    Regards

    Peter
  • 0 in reply to Peter Meaney
    TI__Genius 12990 points
    Hi Kareem,

    Thanks for your question about this TIDA!

    It looks like the only IC that restricts the input voltage range is UCC28722 (primary side flyback controller) and UCC28180 (primary side PFC controller) which both have a range from 85V to 265V. This makes me believe that simply changing the design parameters and optimizing the passive/active components would allow you to achieve your design requirements. Regulation, efficiency, EMI, output ripple, startup, and switching stresses are all the things to consider when redesigning to 90V - 260V VIN. However the EVM form factor may restrict your 500W power level. Let me run your numbers through the component design calculation part of the TIDA design guide, then do a delta and update you.

    Thanks,