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UC3843: UC3843 flyback boost design

hongwei duan
Intellectual 450 points
Part Number: UC3843

Hello, I have a project that requires UC3843 to do flyback boost, with input DC9V, output 100V and current 0.5A. I would like to ask if there is any reference for relevant design calculation, especially relevant documents for transformer design.

  • 0
    TI__Mastermind 32775 points

    Hongwei,

    You can search the TI Reference Design Database here. Also, you peak primary (MOSFET) current will be very high (~27 A). For VIN=9V, I might recommend to consider the push-pull topology as a better option. You can download the free simulation tool, TI Power Stage Designer, and compare the first order performance of each proposed topology. You can also search the TI PWM controllers database here (includes general purpose PWM for flyback) and I have parametrically filtered the selection of push-pull PWM controllers here.

    Regards,

    Steve