Optoisolators - Logic Output

TLP2361(V4) is a photocoupler with an independently-powered photo-transistor output, which is widely used in power and data signal transmission circuits, voltage isolation and noise suppression. It is employed in a wide range of applications, including power-line isolation and industrial AC motor control circuits.

TPTLP2361(V4) Features

• Low power consumption
• High isolation voltage
• High speed response time - 1μs (typ)
• Coupling capacitance of only 0.4pF
• Low output saturation voltage - 0.45V

Application Fields

TLP2361(V4) is one of the most important opto-isolators used in modern circuits. It has multiple practical application fields, including:

• Transmission, distribution and motor control systems
• Signal transmission circuits for data communications
• Telecommunication systems
• Ultrasonic imaging systems
• Automatic control systems
• Audio systems

Working Principle

TLP2361(V4) consists of a gallium arsenide infrared LED, optically coupled to a photosensitive semiconductor phototransistor. When the LED is forward biased, it produces infrared light. The incident light is absorbed by the phototransistor, causing its collector-emitter current to increase. This photocurrent causes the output transistor to switch into the linear region, allowing a voltage gain of approximately 0.5. The output of the phototransistor of TLP2361(V4) is a drain current proportional to the received infrared light intensity.

Conclusion

TLP2361(V4) is a logic output optoisolator with wide applicability and impressive performance. It is designed to meet the needs of various fields, including transmission, distribution and motor control systems, signal transmission circuits for data communications, telecommunication systems, ultrasonic imaging systems, automatic control systems and audio systems. TLP2361(V4) consists of a gallium arsenide infrared LED, optically coupled to a photosensitive semiconductor phototransistor, which produces a drain current proportional to the intensity of the infrared light intensity. This makes it an ideal solution for voltage isolation applications, and provides for the high-speed low-power operation of today\'s circuits.