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UCC256403: Need Help with reference design for DC DC Buck Isolated Converter I/p 50-150V DC to O/p 12V 200W

Vijay Gohil12
Intellectual 465 points
Part Number: UCC256403
Other Parts Discussed in Thread: LM5036, PMP40500

Dear E2E Support Team,

  Im looking to make new project and i have 2 requirement

1.> Need Help with reference design for DC DC Buck Isolated Converter I/p range from 50-150V DC to O/p 12V 200W  

2.> Need Help with reference design for DC DC Buck Isolated Converter I/p range from 50-150V DC to O/p 24V 200W  

 My  O/P need efficiency of lowest 84% and also have over voltage and over temp protection, so any reference design if you can help me for the same or any part number.

I did try using TI WEbench and it generated me an reference design link here. Will this work? My main reason to write is if TI has any evaluation card or ready to reference design it would really help rather then trying from scratch! Since my target is deadline <20 days!

Thanks in Advance! Deeply awaiting your reply!

Best Regards,

  V. Gohil

  • 0
    TI__Mastermind 33115 points

    Hi Vijay,

    PMP40500 is one design that is close to your specs. The half-bridge is well suited for 500W and is basically a double-ended, isolated buck topology. PMP40500 is a half-bridge with output 12V, 42A. the input is a bit narrower compared to your requirements at 50V<VIN<60V but I believe you can modify the transformer turns ratio and this will be a good starting point. LM5036 is the dual output, half-bridge PWM controller used in this design but there are other dual output TI PWMs you might consider and those are parametrically filtered here.

    Because your output current is high, I would also recommend to consider using a current doubler rectifier output. Instead of using a single output inductor of value L, the current doubler uses two smaller inductors of L/2 x 2 and also offers some nice benefits such as ripple current cancellation and better thermal distribution. the current doubler rectifier can be used in any double-ended converter (half-bridge, push-pull, full-bridge, phase shifted full-bridge).

    You can use TI Power Stage Designer and select the half-bridge topology and this will allow you to play with power stage parameters so you can get closer to your requirements.

    Once you select a PWM controller, you can sense voltage and temperature in a variety of different ways and take whatever corrective action your design requires (latch off, restart, non-latching, etc).

    Regards,

    Steve M