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High Current Voltage Regulator Circuit

Last Updated on November 17, 2024 by Admin Leave a Comment

Applications needing strict voltage controls and ripple rejection standards can utilize the circuit shown below. All leftover ripple factor is fully corrected thanks to the configuration of the transistor pair.

How the Circuit works

With the help of common transistors, the circuit below demonstrates how to easily create a highly stable and precisely controlled DC voltage output.

It's fairly easy to grasp the circuit, therefore let's look at it from the following angles:

It is intended to handle currents more than 3 amps, but not more than 5 amps, using a straightforward, effective, high current 2N3055 power supply.

By adjusting R1 and the zener diode's value, the necessary voltage may be stabilized appropriately.

The voltage applied from the transformer is rectified by the diodes at the input, which are arranged in a bridge network structure.

C1 smoothes the DC even more before feeding the processed DC to Q1 and Q2's controller circuit.

By giving the transistor combination the necessary biasing, R1 is brought in to begin the circuit.

C2 ensures that the transistors obtain a ripple-free, completely clean DC at their base.

Regardless of the voltage at the input, the zener diode at the base of the Q1 pinches the transistor with a set biasing voltage and prevents any increase at the output voltage.

That is to say, regardless of how high the input voltage from the bridge network increases, the output stays the same and generates the voltage determined by the zener diode and R1 settings.

High Current Voltage Regulator Circuit

Parts List

ComponentSpecificationsQuantity
Resistors1/4 watt 1% MFR
2.2 kΩ1
10 kΩ1
56 Ω1
Capacitors
Electrolytic1500 µF / 50 V1
500 µF / 50 V2
Semiconductors
Bridge Rectifier Diodes6A44
Zener Diode1 watt, voltage value as desired between 3 V to 30 V1
Transistors
2N30551
2N30541
Heat SinkLarge finned heatsink for the above transistors2
Transformer0-15V, 5 amp1

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About Admin

Hey friends, Thanks a bunch for stopping by this site! I am an engineer with a Bachelor of Engineering in Electronics and Telecommunication. One of my passions is gathering information from all sorts of electronics books and tutorials. I then take that information and compile it into a language that is super easy to understand. My goal is to make those complex electronics circuit concepts and technical terms much more accessible for all the new and budding electronics engineers out there. I can also design customized circuit diagrams as required by the users.
If you have any questions related to this field, please do not hesitate to drop a comment! I am always here and ready to help you out with any queries you might have. I cannot wait to hear from you!

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