Circuits > Power > 2 Watt Switching Power Supply
2 Watt Switching Power Supply
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 circuit
Title: 2 Watt Switching Power Supply
Source: unknown
Published on: 2007-07-21
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