CQ220I-16M

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Thyristors and TRIACs are two commonly used types of semiconductor switches. The CQ220I-16M is a popular device in the TRIAC family that is widely used in industrial applications. This article will discuss the fields of application for the CQ220I-16M and explain its working principle.

Applications of CQ220I-16M

The CQ220I-16M is a general-purpose TRIAC that is used mainly in industrial and commercial applications. It offers low on-state voltage drop and low gate trigger current. Its main uses include AC motor control, power switching, switching lighting, and static relays. The device is suitable for both resistive and inductive loads, making it one of the most versatile TRIACs available. It is also suitable for use in ambient temperatures up to 125°C.

The CQ220I-16M is also commonly used in switchmode power supplies, such as those used in a wide variety of household appliances. The device is well suited for this application due to its fast switching speed, low gate current requirements, and large current capacity. It is also often used in AC output circuits, such as those found in power supplies for heating and air conditioning systems, due to its ability to switch large currents with consistently low on-state voltage drop.

Working Principle

The CQ220I-16M is a thyristor device, belonging to the family of devices known as TRIACs. The device consists of three elements - two thyristors in series and an additional diode connected between the two. The TRIAC can be switched On by applying a small current to the gate element. This will cause both thyristors to turn On simultaneously, thus allowing current to flow through both legs of the TRIAC. The device can be switched Off by reversing the voltage applied to the gate element.

When the TRIAC is switched On, the current flowing through the device is limited only by the external circuit in which it is placed. This current can be controlled by varying the gate current and thus providing a variable power control. The device is also capable of providing a variable control of the output voltage. This is achieved by varying the gate current, which in turn affects the on-state voltage drop of the device.

When the TRIAC is switched Off, the device behaves like an open switch and the current through it drops to zero. The TRIAC is capable of providing extremely fast switching as the circuit load can be switched instantaneously without affecting the current flowing through the external circuit.

Conclusion

The CQ220I-16M is a popular device in the TRIAC family that is widely used in a variety of applications. It is a versatile device able to switch large currents with low on-state voltage drop, and it is suitable for use in ambient temperatures up to 125°C. The device can be switched On and Off by applying a small current to the gate element, and its operation is based on the principle of two thyristors in series, with an additional diode connected between the two. The device is an excellent choice for switchmode power supplies, AC output circuits, and a wide variety of other applications.

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