Offline-converter


Posted on Feb 16, 2013

This nonisolated, unregulated, minimum component converter fills the void between low-power zener regulation and the higher power use of a 60-Hz input transformer. It is intended for use where)`er a nonisolated supply can be used safely. The circuit operates~by conducting only during the low-voltage portion of the rectified sine wave.


Offline-converter
Click here to download the full size of the above Circuit.

Rl and D2 charge Cl to approximately 20 V, which is maintained by Ql. This voltage is applied to the gate of Q2, turning it on. When the rectified output voltage exceeds the zener voltage ofD4, Ql turns on, shunting the gate of Q2 to ground, turning it off.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Lithium Ion Lithium Poly Charger by LM317
    scr high power alarm driver circuit design
    lezers bijdrage
    EUA2123 20-W Stereo Class-D Audio Power Amplifier
    Transformerless 5 Volt Power Supply
    Emergency warning light LED alarm
    RF amplifier coupling
    REMOTE CONTROL TRANSMIITER



    Top