How the Darlington Pair transistor is made?

In electronics, a multi-transistor configuration called the Darlington configuration (commonly called a Darlington pair) is a circuit consisting of two bipolar transistors with the emitter of one transistor connected to the base of the other, such that the current amplified by the first transistor is amplified further …

Why you would use a Darlington Pair instead of the single transistor circuit?

The Darlington Pair offers a number of advantages. It is primarily used because it offers a particularly high current gain and this also reflects into a high input impedance for the overall Darlington circuit when compared to a single transistor.

Why Darlington Pair is used?

The Darlington pair is mainly used for It has high current gain β; (equal to the product of current gain of individual transistors) and is useful in applications where current amplification or switching is required. It also has high input impedance and low output impedance.

How is a Darlington Pair transistor different than a regular BJT transistor?

Unlike a single transistor which has a saturated voltage drop of between 0.3v and 0.7v when fully-ON, a Darlington device has twice the base-emitter voltage drop (1.2 V instead of 0.6 V) as the base-emitter voltage drop is the sum of the base-emitter diode drops of the two individual transistors which can be between …

How does Darlington transistor work?

A Darlington transistor acts as a single transistor with high current gain, it means that a small amount of current is used from a microcontroller or a sensor to run a larger load. The below Darlington circuit is built with two transistors shown in the circuit diagram.

Where are Darlington transistors used?

Applications of Darlington Transistor Darlington transistors are mainly used in switching and amplification applications for delivering a very high DC current gain. Some of the key applications are high and low side switches, sensor amplifiers and audio amplifiers.

What does a Darlington pair consists of?

two npn transistors
A Darlington pair consists of two npn transistors connected as shown in the diagram. The way they work is easier to understand if it is explained in terms of conventional current. Given a small base current flowing to Q1, a much larger collector current flows into the transistor and out of the emitter.