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

    Dew sensor circuit
    Guitar and bass tuner
    Counter 0-9 Using Arduino Microcontroller
    Simple short range portable FM transmitter circuit diagram
    Programming PIC 16F84A
    Pyroelectric automatic door control circuit



    Top