H11G23SD

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Optoisolators, also known as optocouplers, are electronic components that use a photoreceptor to isolate two circuits electrically. The H11G23SD optoisolator belongs to the Transistor, Photovoltaic Output category. It is a photocoupler module used for general purpose sampling and driving applications. Its primary use is to provide digital interfacing between two circuits while maintaining the insulation between them.

Overview

The H11G23SD optoisolator is composed of an infrared LED that sends optical signals that are received and converted into electrical signals by a photovoltaic device. This picture shows the internal structure of an H11G23SD optoisolator:

The transmitter LED emits incident light when the input voltage is applied and couples the optical signal to an NPN transistor. This light signal causes a voltage differential in the photovolves, triggering the NPN transistor on the reverse side, and driving the output. The NPN output transistor can be used to interface high-speed digital signals between two circuits.

Specifications

The H11G23SD optoisolator provides a high degree of isolation between input and output signals, with an insulation voltage of 1,500Vrms or 2,250Vdc, making it suitable for use in desensing applications. Itoffers a speed of 0.6-0.7 of a microsecond maximum propagation delay, which is suitable for most digital interfacing applications. In addition, the optocoupler has a high light load capacity of 25,000Lux and an average radiant intensity of 200.0mW/me, which ensures a stable operation. The optoisolator has a power dissipation rating of 85mW and is compliant with UL/CSA rated voltage of 600V.

Applications

H11G23SD optoisolators are used in a variety of applications, including desensing, signal control, logic isolation, digital driving, and sampling. They are suitable for use in automotive systems such as antilock brakes, engine control systems, power doorlocks, and headlight dimmers. In addition, the optoisolator can be used in industrial automation and control systems, including motor controls, HVAC, process control, and monitoring.

Working Principle

The optocoupler is based on the principle of photon-to-electricity reaction. The input circuit is connected to the LED and is triggered by an electrical signal. When the LED receives the signal, it emits infrared light that is detected by the photovoltaic cell. This photon-to-electricity reaction causes a voltage differential between the input and output circuits, triggering the NPN output transistor.

The NPN output transistor is responsible for transferring the digital signal to the output circuit and isolating the two circuits electrically. This effectively eliminates the noise signals and ensures that the output signal remains unaffected by the noise from the input circuit.

Conclusion

The H11G23SD optoisolator is useful for providing digital interfacing between two circuits while also maintaining high isolation between them. It offers excellent performance with its high insulation voltage and fast speed, while its compact size makes it suitable for use in a variety of applications. As such, it is becoming increasingly popular in a range of industries.

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