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Circuits > Power > 2W Switching Power Supply
2W 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.
Title: 2W Switching Power Supply
Source: unknown
Published on: 2005-08-27
Reads: 511
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