Q2006L4

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Thyristors - TRIACs

The Q2006L4 is an optically isolated TRIAC, belonging to the family of Thyristors. Unlike transistors, Thyristors are semi-conductors that can restrain current flows in both directions. As a four layer diode, thyristors are known for having 3 terminals - an anode, a cathode and a gate. Apart from that, Thyristors also have other components such as four interconnected diodes and a gate structure that is connected to the anode and the cathode.

One of the major applications of the Q2006L4 is home lighting systems. The optically isolated TRIAC acts as a switch that controls the current entering the load. By varying the voltage on the gate of the TRIAC, the current is triggered to create a voltage drop before the TRIAC is able to start conducting. In other words, the TRIAC acts as a switch that generates either an open/close or complete off/on state based on the triggering voltage. Along with that, some of the other applications of the Q2006L4 include motor control, solenoid control, light dimming and fan speed control.

The working principle of the Q2006L4 is based on the properties of the four layers of transistors that are joined together. To begin, the anode of the TRIAC is subjected to a positive voltage, allowing the current to pass through the p-n junctions, which allow the collected voltage to switch the gate. When the current from the gate reaches the booster, it is amplified and reaches the NOS. The NOS then switches the current and an electrical arc is created across the TRIAC. During this process, the entire voltage is discharged on the anode terminal, which is why it is based on the principle of the open circuit.

In conclusion, the Q2006L4 is a type of optically isolated TRIAC that is used for controlling the current in different home automation applications, such as lighting systems, motor control, solenoid control and fan speed control. Its working principle is based on the switching of the current from the gate to the anode of the TRIAC, which is then discharged across the anode terminal.

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