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LM5022: Suitable Boost Reference Design

Kuan Wei Chen (Kevin Chen)
Genius 9710 points
Part Number: LM5022
Other Parts Discussed in Thread: LM5020, , LM5122, LM431

Dear Team,

Please suggest a suitable reference design for the engineer to copy.

The Boost part is basically 36V or 44V to 54V / 0.5A (min), but it should be 52V to 54V / 0.2~0.3A.

It needs to support OVP. I hope it can be turned off at 57~60V.

If VIN = 54V, it will be FORWARD directly, and the efficiency should be more than 90%.

BR

Kevin

  • 0
    TI__Guru 74430 points
    Hi Kuan Wei,

    You current is low, and Vout is high, so a non-sync boost controller can support your application. Because your input voltage can reach 54V, you may consider LM5020, LM5022, or the sync controller LM5122.

    Regarding OVP, do you mean the input OVP? You can use a simple LM431 circuit to monitor VIN and use it to control the UVLO or enable pin of the PWM controller.

    Please submit a ref design request to SEM/PDS group if you want a ref design.

    Thanks,
    Youhao Xi, Application Engineering
  • 0 in reply to Youhao Xi
    TI__Genius 9710 points

    Dear Youhao,

    So you also didn't find a suitable reference design can directly provide it to the customer?

    They are still in the RFQ stage, so I don't think a PDS request is suitable here.

    BR

    Kevin

  • 0 in reply to Kuan Wei Chen (Kevin Chen)
    TI__Guru 74430 points
    Dear Kevin,

    Yes I don't find an existing design that can be directly used for this case. However, you can ask your customer to create the design with Webench.

    Best Regards,
    Youhao