HCPL-2231-300E

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Optoisolators - Logic Output

The HCPL-2231-300E (also known as the Avago ACPL-2231), is a hybrid logic output optoisolator. Operating at 5V, with a minimum data rate of 10kbps, it isolates 2 single-ended digital signal paths with a 5kVrms minimum isolation voltage, making it suitable for a variety of industrial applications, such as automotive and medical.

Application

Its small footprint and wide voltage range make the HCPL-2231-300E suitable for high-density applications, and it is commonly used in applications such as industrial control systems, process control systems, motor control systems, and elevator control systems. It is also used in safety systems to monitor limit switches and monitor analog signals for safety purposes.

Working Principle

The HCPL-2231-300E functions as a digital optocoupler that utilizes an IRED (infrared emitting diode) emitter and detector pair. The IRED emitter, commonly referred to as the light source, is biased using an external voltage source and supplies a direct injection current to the LED. The LED then emits light that is then detected by the receiver. The receiver senses the current and converts it into a logic output voltage level.

The receiver provides an output current, known as a logic level, that is inversely proportional to the light intensity. The logic level is determined by the user\'s application requirements and can be set as High or Low logic-level thresholds. The output voltage is then filtered and buffered for noise rejection and improved electrical isolation.

Advantages

The HCPL-2231-300E provides up to 5kVrms of transient voltage protection, and its small package size reduces board space and simplifies circuit design. The optocoupler also provides high speed operation and high-quality isolation without having to use a transformer or optically clocked circuit. Additionally, the HCPL-2231-300E has fast transient response and excellent jitter performance, allowing it to be used in a wide variety of applications.

Conclusion

The HCPL-2231-300E is a versatile and reliable optoisolator device that can be used in a variety of industrial and safety-related applications. Its high speed and small footprint make it suitable for high-density applications. Additionally, the optocoupler’s small signal path and high-voltage transient protection ensure reliable and consistent isolation performance.

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