Aug 302019
 

12v to 24v converter circuit

This 12v to 24v converter circuit is very useful for powering devices that work with 24v when we only have a 12v voltage source. The voltage source could be a car battery or similar

How the 12v to 24v converter works?

This 12v to 24v boost converter circuit is based on an oscillator consisting of two NPN bipolar transistors (T1 and T2).
The oscillator handles the transistor T4 that passes from its cutting region to its saturation region continuously.

The transistor T4 is a N-channel MOSFET power transistor capable of conducting a current of up to 18 amps. The coil, which is the element that helps raise the voltage, must be built on a ferrite core and is made of 100 turns of 1 mm cross-section cable.

12v to 24v converter circuit - 12v to 24v step up converter circuit

Transistor T3 is part of the feedback network and feeds back the output voltage to the gate of the transistor T4, acting when necessary to correct any variation of the output voltage. The output voltage is set using a zener diode D4. The output voltage may be different, if the zener diode is changed to another zener diode of different voltage.

List of components 12v to 24v converter circuit

  • 2  2.2K resistors (R1, R4)
  • 2  1K resistors (R5, R6)
  • 3  4.7K resistors (R2, R3, R7)
  • 1  10K resistor (R8)
  • 2  100 nF capacitor (C1, C3)
  • 1  10 nF capacitor (C2)
  • 1  1000 uF capacitor (C4)
  • 3  BC548 NPN bipolar transistors (T1, T2, T3)
  • 1  N-channel MOSFET power transistor IRF640 (T4)
  • 3  1N4007 semiconductor diodes (D1, D2, D3)
  • 1  24 volt zener diode, 1 watt or more (D4)
  • 1  inductor created as mentioned in the text
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