HCPL-2202-500E Isolators

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Optoisolators are components that are made up of an LED and a phototransistor. The LED is optically coupled to the phototransistor, which allows the LED to control the phototransistor without electrical connection between them. The optical isolation provided by the optoisolator prevents interference caused by high voltages, currents, or noise in electrical signals. The HCPL-2202-500E is a common optoisolator, which is part of the “Logic Output” optoisolator family.

Application Field

The HCPL-2202-500E is a general purpose optoisolator with an integrated output transistor, which can switch loads up to 500mA (maximum) and 10V (maximum). It is commonly used in opto-isolated control circuits, such as those found in noise-sensitive digital logic applications. It can also be used in power supply feedback loops and other applications that require logic isolation. The optoisolator is designed to work with a logic input voltage of between 4 and 15V.

It is also capable of providing electrical coverage between input and output, which is beneficial in applications related to protection against electromagnetic interference (EMI). This optoisolator is suitable for AC and DC applications, and can operate within temperature ranges of -40°C to 85°C. It is also widely used in protection circuits and signal conditioning where isolation is required.

Working Principle

The HCPL-2202-500E optoisolator consists of an LED and an output transistor. When a voltage is applied to the LED, it emits light which is then picked up by the phototransistor. This causes a current flow through the output transistor, which switches on and off depending on the light intensity received by the phototransistor. This enables the LED to control the output transistor without any electrical connection between them, allowing the optoisolator to provide electrical isolation.

The output transistor of the optoisolator is capable of driving up to 500mA of current, depending on the input voltage and current. This makes the HCPL-2202-500E a popular choice for optoisolated control circuits that need to switch loads up to 500mA. It is also capable of switching between 0.2V and 10V on the output, which makes it suitable for use in a variety of applications.

The HCPL-2202-500E optoisolator is designed with an open collector output transistor, which requires a pull-up resistor on the output side of the circuit in order to achieve a high logic level output. This ensures that the output of the optoisolator is properly reflected in the logic state of the circuit. It is important to ensure that the resistor used is of the correct value, otherwise the optoisolator may not be able to switch correctly.

The HCPL-2202-500E optoisolator is a reliable and cost effective choice for a variety of opto-isolated control applications. It is designed to operate within a wide temperature range, making it suitable for use in a variety of environmental conditions. The optoisolator is also capable of providing electrical isolation between input and output, which is beneficial in applications that require protection against EMI. Additionally, the output transistor is capable of driving up to 500mA of current, making it a cost effective choice for applications that require switching of small loads.

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