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About Fly-Buck Power Supply for Industrial Power Question

user5956241
Intellectual 565 points

Dear TIer,

I am saw the following TIDS are all for power device use, so , Could you help us to advice how to choose the suitable circuit for separate positive / negative voltage?

https://www.ti.com/tool/PMP10543

https://www.ti.com/tool/PMP10531

l

Advance

Dis Advance

Type 1

R_load and freewheeling diode loss

2 wire and Centre tap

Type 2

1 wire and Zenner Diode Clamp

Poor load regulation

Large Zenner Diode loss
  • +1
    TI__Intellectual 2845 points

    Hi,

    You did an excellent job of summarizing the trade-offs for the two approaches.  Type 1 is better performance, but requires extra windings on the transformer. 

    - If you require better regulation and lower loss, try to use Type 1.  However, if you require several secondary windings on the transformer it might become difficult to find a bobbin with enough pins. This might force you to use Type 2.

    - If you can tolerate the regulation and slightly higher loss, Type 2 would simplify the transformer design.

    regards,

    Brian