2 watt switching power supply


Posted on Feb 7, 2014

In this small switching power supply, a Schmitt trigger oscillator is used to drive a switching transistor that supplies current to a small inductor. Energy is stored in the inductor while the transistor is on, and released into the load circuit when the transistor switches off. The output voltage is dependent on the load resistance and is limited by a zener diode that stops the oscillator when the voltage reaches about 14 volts. Higher or lower voltages can be obtained by adjusting the voltage divider that feeds the zener diode. The efficiency is about 80% using a high Q inductor..


2 watt switching power supply
Click here to download the full size of the above Circuit.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    True RMS Watt Meter
    Geiger counter
    On-off Infrared Remote Control
    Introducing DOGZILLA
    Infra-Red Sensor/Monitor
    ELECTROMAGNETIC RING LAUNCHER
    Build Your Own Motorcycle Alarm
    Traffic intersection light automatic controller circuit
    A long delay light control lighting controller circuit
    Light control relay circuit
    Automatic range switching circuit diagram PGA202



    Top