H11L2SM

Optoisolators - Logic Output

The H11L2SM is an optocoupler that uses a light emitting diode in series with a photodetector. It is designed for digital applications that require electrical isolation between the input and output circuits. It offers high common-mode transient immunity and wide input-to-output isolation voltage, making it ideal for applications that require noise immunity and high speed data transmission.

The H11L2SM is a bicomponent optocoupler with an integrated MOSFET and LED driver. Its output stage consists of a N-channel MOSFET which is activated when light of sufficient intensity is detected by the photodetector. The device is designed to operate in both linear and switching mode, providing logic level outputs along with a self-protection feature.

The Application Field of H11L2SM

The H11L2SM is ideal for applications requiring isolation between input and output circuits. This includes industrial systems such as AC drives, stepper motor controllers, motor control systems, DC/DC converters, industrial power supplies, robotics, automation, and security systems. The device is also suitable for use in consumer electronic products such as DVD players, VCRs, digital cameras, and other portable electronic devices. It can also be used in medical equipment, communication and automotive systems.

The Working Principle of H11L2SM

The H11L2SM optocoupler works by using the photovoltaic effect. When light from the LED is incident on the photodetector, a small current is generated, approximately proportional to the intensity of the light. This current activates the internal MOSFET which draws current from the LED, and the load is turned on. The current then flows from the LED to the photodiode, and then to the ground, providing an isolated voltage potential between the input and output circuits.

The H11L2SM has a maximum off-state stay duration of 5 milliseconds, and can switch at speeds as fast as 10 microseconds from the time it starts to detect light to the time it turns off again. It requires a minimum input current of 1mA in off-state and a maximum input current of 10mA in on-state. The device also has an inbuilt self-protection feature that prevents it from overloading.

The H11L2SM is a versatile and versatile optocoupler due to its high noise immunity, wide voltage range, and high speed switching. It is ideal for applications where electrical isolation is required and robust operation is needed.