Any DC source voltage (up to 15 V DC) may be doubled using the CMOS IC-based design below.
The proposed system can run applications at little above thirty mA of current and double any voltage between 4 and 15 V DC.
The schematic illustrates that this DC voltage doubler circuit utilizes a solitary IC 4049 to accomplish the intended outcome.
IC 4049 Pinouts
How the Circuit Works
All six of the IC 4049's gates work well together to provide the voltage doubling operations that are being explained. Six gates are included, two of which are set up as oscillators.
The oscillator part is located on the far left of the figure.
These two fundamental components—the 0.01 capacitor and the 100 K resistor—are what determine frequency.
When implementing voltage stepping-up operations, a frequency is essential, necessitating the use of an oscillator in this situation as well.
When a set of capacitors is initialized and discharged at the output, these oscillations become helpful. This is equivalent to increasing the voltage throughout the group of capacitors so that what emerges is two times the applied supply voltage.
But it is not ideal to apply the oscillator's voltage immediately to the capacitors; instead, it must pass via a set of parallel-arranged IC gates.
When these parallel gates are combined, they effectively buffer the frequency being utilized from the generator gates, making the subsequent frequency far more powerful in relation to current and able to withstand comparatively greater output load levels.
It is not possible to anticipate an output current managing capability more than 40 mA while adhering to the standards of a CMOS integrated circuit.
Higher loads beyond this can cause the voltage level to deteriorate in the direction of the supply voltage.
To achieve somewhat greater circuit efficiency ranges, the output capacitor numbers could be adjusted to 100uF.
This IC 4049 based voltage doubler circuit can produce an output of about 22 volts when supplied with a 12 volt supply input.
Parts List
| Reference | Value |
|---|---|
| R1 | 68K |
| C1 | 680pF |
| C2 | 100uF/25V |
| C3 | 100uF/25V |
| D1 | 1N4148 |
| D2 | 1N4148 |
| N1 | IC 4049 |
| N2 | IC 4049 |
| N3 | IC 4049 |
| N4 | IC 4049 |
| LEDs White | 3 nos. |