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Input: 24~48V, multi isolated output power solution

Bell Ye
Intellectual 1135 points
Other Parts Discussed in Thread: LM5022, TPS23756, LM5122, LM5160, PMP10532, PMP9253

Hi Team,

Our customer is requesting a power solution in a CT project as below, do you know if TI have any recommended solution that we can propose? Look forward to your feedback, many thanks! 

  • Input: 24~48V
  • Output:
    • need to be isolated from input
    • +12V 0.25A
    • +5V, 3A
    • ±5V, 0.3A (isolated from 12V and 5V)

Thanks and look forward to your feedback, thanks!

Bell

  • 0
    TI__Genius 9130 points
    Bell,

    Since this is a very unique spec target, it's hard to find an existing TI Design that's a close match.

    You can search the available TI Designs and reference designs here:
    www.ti.com/.../refdesignsearchresults.tsp

    If you click on the tab “search power designs by parameters” you can refine the list based on DC input, isolated output, voltage & power level, etc.


    I have found the following possibilities which meet the input range and are close to the required output power level, which could be used as a good starting point.

    The Flyback designs could be modified pretty easily to add extra isolated outputs by adding more secondary windings to the transformer. Some redesign of the power stage would be needed to scale the power up or down as appropriate. There are also some Active-clamp Forward designs which I have omitted – although they would offer better efficiency compared to Flyback, it would be more difficult to add the other isolated outputs:


    http://www.ti.com/tool/PMP9282
    LM5022 Flyback 9-60 V in, 3V3 @ 4.5 A (15 W), add more windings for other outputs, some redesign to increase power level slightly.

    http://www.ti.com/tool/PMP6659
    TPS23756 Flyback 10.5-57 V in, 12 V @ 1.25 A (15 W), add more windings for other outputs, some redesign to increase power level slightly.

    http://www.ti.com/tool/PMP9253
    LM5022 Flyback 9-60 V in, 5 V @ 3 A (15 W), add more windings for other outputs, some redesign to increase power level slightly.

    www.ti.com/.../PMP10506
    LM5122 Flyback 9-60 V in, 5 V @ 6 A (30 W), add more windings for other outputs, some redesign to decrease power level slightly.

    www.ti.com/.../PMP20551
    LM5022 Flyback 12-60 V in, 12 V @ 3 A (36 W), add more windings for other outputs, some redesign to decrease power level slightly.


    I hope this helps.


    Thanks,
    Bernard
  • 0
    Expert 2225 points
    Hi Bell,
    As Bernard told that It seems very specific requirement you have so there may not any off the shelf solution but you can use multiple designs to get your job done. I am suggesting some reference design links of TI which is suitable to your requirements. I hope it will help you.
    Please see this:

    www.ti.com/.../PMP20551

    www.ti.com/.../PMP20210

    www.ti.com/.../PMP5666

    Thanks
    Bhavdipsinh
  • 0 in reply to Bhavdipsinh Rathod
    TI__Intellectual 1135 points
    Hi Bernard and Bhavdipsinh,

    Thanks a lot for prompt help, since there are multi outputs, we may propose the below solution,

    We have PMP10532 based on LM5160 cover the following
    +12V 0.25A
    ±5V, 0.3A (isolated)

    And PMP9253 based on LM5022 cover the following: +5V, 3A

    regards,
    Bell