EL816

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Optoisolators are electronic components that are designed to isolate a control circuit from a powered circuit. They are often used in automotive, aerospace, medical and industrial applications. The EL816 optoisolator is a type of optoisolator with a transistor output. It is a 4-pin device designed to provide high isolation voltage, reasonable current handling capabilities, and excellent noise immunity between mains and low voltage electronics.

The EL816 Optoisolator

The EL816 optoisolator consists of an optically-coupled pair of a light-emitting diode (LED) and a photovoltaic output transistor in the same package. The LED emits light and the photovoltaic transistor output is coupled to the LED through an optically-coupled insulator. The output transistor has a current gain (β) greater than 5,500. This device is attracted to any changes in the output voltage and responds within 100 nanoseconds.

The EL816 optoisolator is built with a single semiconductor chip and has an operating temperature range of -65°C to +125°C. This device is available in a variety of packages, such as DIP (dual inline package), SOIC (small outline integrated circuit) and SMT (surface mount technology). It also has a wide range of input voltage (7 to 40 volts) and a current range of 5 to 50mA.

EL816 Application Fields and Working Principle

EL816 optoisolators are used in a wide variety of applications that require isolation of control circuits from powered circuits, such as industrial automation, medical equipment, telecommunication, automotive, aerospace, robotics, and consumer products. It is also used in electrical applications like digital and analog signal conditioning, and Pulse-width modulated (PWM) control circuits.

When the EL816 optoisolator is energized, the current through the LED generates enough light to turn on the photovoltaic transistor. This closes the electrical connection between the control circuitry and the powered circuitry, making it possible to control the powered circuit without creating electric arcs. Since the optoisolator provides electrical isolation, it prevents electrical feedback and reduces the potential of electrical noise.

The EL816 optoisolator features excellent noise immunity and a high current transfer ratio (CTR). It also has a low on-state resistance (Rdson) and low power consumption. The optoisolator’s low voltage operation enables it to be used in AC and DC power sources without requiring additional external components.

The EL816 optoisolator offers high isolation voltage, excellent noise immunity, reasonable current handling capabilities, and a variety of packages for applications requiring high reliability and cost-effectiveness. It is used in multiple industrial, automotive, medical, and telecom applications and is highly suitable for controlling and measuring any type of circuit.

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