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Tuesday, August 25, 2009

Simple Voltage Booster Using Transistor

This is a design simple voltage booster circuit. This circuit is used for boosting 12 V DC to 24 V DC .The circuit is designed straight forward and uses few components. With few modifications the circuit can be used to boost any voltages. This circuit is work with based on operation of the transistor. This is the figure of the circuit.

The transistor Q1 and Q2 (D1616) essentially drives the primary of the transformer. The component values are not very specific here. We can use any NPN power transistors like D1616, 2N 3055, C2236, SL 100, etc for Q1 and Q2. The diode rectifies the output of transformer to obtain a 24V DC at the output load (here a fan). The diodes can be 1N 914 ones. The capacitors filter away noise and harmonics away from the output. For high current (around 5A) games use 2N 3055 transistor or more powerful Darlington pairs for Q1 and Q2. The transformer can be any center tapped 5A transformer with a 7:1 winding ratio. By experimenting on the transformer winding you can get different boost ratios.

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