2W Switching Power Supply

Electronic Schematics > Power > 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
electronic circuit
Source: unknown
Published on: 2005-08-27
Reads: 927
Print version:

Other electronic circuits and schematics from Power

---

• Fixed Voltage Power Supply

• 120 VAC Lamp Dimmer

• Basic UPS Power Supply

• Ni -Cd Batteries Charger

• Variable 3 - 24 Volt / 3 Amp Power Supply

• 0-50V 2A Bench power supply

• Self switching Power Supply

• High and Low Voltage Cutout with delay and Music

• Nicad Battery Charger

• Whistle On - Whistle Off