Can i change this to tny277?

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  • bearjumpjump
    Member
    • Jul 2024
    • 13
    • Indonesia
    #1

    Can i change this to tny277?

    I have this cheapo sfx power supply with offline switcher marked ME8117 and I can't find it's replacement in my country
    Here's its datasheet
    It's pretty much chinese


    OB : external starting resistor/ starting current input

    OC : output to transfirmer

    IS : switch current sampling & setting limits, external current sampling

    I include drawing of my power supply schematic in those me8117 area, and its quite different from datasheet typical wiring, lol.


    My psu use sc6105.
    +5v standby it's okey


    Can I somehow change this offline switcher with tny277 or any common ic? I kinda afraid how it's wiring, connecting where to where

    Tny277 only need 4 wiring right?


    En to collector opto
    BP to emitter opto with cap in series
    (what's the cap value?)

    ​​​​​​S to emitter opto
    D to +AC with snubber network
    (what's resistor and cap value and what diode?)

    Please help me guys
    Pleasee
    I really appreciate it
    Thank you

    I made the same thread 2 days ago and no one replied lol

    ​​​​​








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