MCT2202

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The MCT2202 optoisolator is a single-channel transistor output type optoisolator that features guaranteed minimal CTR performance, comparatively low power consumption, very wide LED current operating range, and an output transistor with a 1.5 kV minimum breakdown voltage rating. It\'s often used in switching applications, such as driving relays, solenoids, or triac power controllers, where very reliable electrical isolation is required.

Overview

The MCT2202 is a 6-pin optoisolator that includes an infrared emitting diode (IRED) encased in a light-proof package, and a photosensitive transistor output (PTO) optically coupled to the IRED. The device starts operating when power is applied to the power terminal, and its CTR (current transfer ratio) is adjustable from 10% to 200%. The CTR is determined by the amount of current flowing through the input terminals, and the high CTR ensures minimum loss in signal strength.

The MCT2202 features a wide operating temperature range of -55˚C to +125˚C, wide LED operating conditions 1 μA to 100 mA, and a maximum output current of 80mA. It\'s also equipped with a guaranteed minimum breakdown voltage of 1.5 kV, which is required for reliable operation in a wide variety of switching applications.

Features and Benefits

• Guaranteed CTR of 10% to 200%
• Wide temperature range of -55˚C to +125˚C
• Wide LED current operating range of 1 μA to 100 mA
• Maximum Output Current of 80mA
• Guaranteed minimum breakdown voltage of 1.5 kV

The MCT2202 is a 6-pin optoisolator, and its output transistor requires a minimum breakdown voltage of 1.5 KV. This makes it particularly suitable for high voltage switching applications, where high reliability is a must. It can also be used in low voltage switching applications, where its wide CTR and low power consumption provide an advantage over other devices.

Applications

The MCT2202 optoisolator is suitable for use in a wide range of switching applications, including those that involve high voltage or low power. Some of the most popular applications include:

• Power supply controllers
• Electrical and electronic relays
• Analog potentiometers
• Optical data transfer
• Photovoltaic power systems
• Industrial and automotive control systems
• Wireless remote control systems

Working Principle

The MCT2202 optoisolator works on the principle of optical isolation. In simple terms, when the supply voltage is applied to the input terminals, the IRED emits infrared light, which is then detected by the photosensitive transistor output. The transistor then conducts, enabling current to flow from the output terminal. The current transfer ratio determines the amount of current that can be transferred between the input and output. Depending on the application, the current transfer ratio can be adjusted to provide the required level of isolation.

The optoisolator can also be used to control the voltage output from the output terminals. By adjusting the current transfer ratio, the voltage of the output terminals can be precisely controlled. This makes the MCT2202 ideal for devices that require a regulated voltage output.

Conclusion

The MCT2202 is a single-channel transistor output type optoisolator that offers reliable operation in a wide variety of switching applications. Its wide operating temperature range, wide LED current operating range, and guaranteed minimum breakdown voltage make it suitable for a variety of switching applications, including power supply controllers, electrical and electronic relays, and photovoltaic power systems. Moreover, its adjustable CTR ensures minimal loss in signal strength, making it a reliable choice for optoisolators.

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