HCPL-261N#500

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Optoisolators, also known as optocouplers, are devices that consist of an infrared LED combined with a phototransistor, photoDarlington transistor, photoconductor, or photovoltaic detector to create an optically isolated electrical circuit. The HCPL-261N#500 is a 6-pins optoisolator specifically designed for logic output and compatible with small and medium-speed logic families. It features IEC/UL/EN 60747-5-2 reinforced isolation and a 0.2A transfer current with common-mode transient immunity of up to 25kV/us.

Working Principle of HCPL-261N#500

The HCPL-261N#500 optoisolator is built around a Gallium Arsenide Infrared LED (GaAIr) emitter, a phototransistor detector, a drive circuit, and an isolation barrier. The LED emits infrared light when a sufficient DC voltage is applied to its anode, and the light is then picked up by the phototransistor detector. The signal travel between the LED and the detector is then amplified by the drive circuit and transmitted to the outputs. The amplified signal is coupled to the secondary side via a transformer and capacitive, which then provides the necessary isolation between the primary and secondary sides.

Features of HCPL-261N#500

The HCPL-261N#500 optoisolator features a 6-pin DIP package allowing easy installation without the need of any extra components. It has a built-in hysteresis for improved noise immunity at high speed switching and an open collector output type for easy amplifier/buffer applications. It also features a wide operating temperature range of -40 to +85 °C and an UL minimum isolation voltage of 3750 VRMS. For best accuracy over temperature, the device features a supply current over the temperature range of ±2mA and a rise/fall time of 15/10 ns, making it an excellent choice for rapid response level shifted circuits.

Application Field of HCPL-261N#500

The HCPL-261N#500 optoisolator is specifically designed for logic-level shifting applications. It is typically used in the Pulse-Width Modulation (PWM) control of servo-motors, stepper motors, or proportional valves for air and fuel control. It is also often used as an isolator for power conversion applications, such as battery backup/switchover and DC-DC converters. Additionally, the HCPL-261N#500 can be used in interface isolation or noise protection for digital and analog signal lines.

The HCPL-261N#500 optoisolator provides a high level of electrical isolation to protect sensitive circuits and offers a dependable interface between low and high voltage circuits. With its low-cost design and pack size, the HCPL-261N#500 is an ideal choice for embedded systems and motor control applications.

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