PS2501L-4

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The PS2501L-4 is an optoisolator of the transistor, photovoltaic output type that allows the communication of digital and analog signals between two different circuits. The electrical isolation of this component greatly reduces the susceptibility of one device to be affected by noise or interference originated from the other device.

This Optoisolator is composed of an LED (light emitting diode) that is used as the light emitter and a phototransistor as the detector. The infrared LED is driven by high current gains and operates with minimal coupling between the AC signals of the input and output stages, while the phototransistor contains a photovoltaic junction that produces a current in response to the received light from the LED. The current generated is then amplified by the transistor to form the output signal. This optoisolator has a wide range of applications, such as motor drivers, power supplies, communications equipment, and lighting control systems.

The PS2501L-4 is a general-purpose optoisolator designed for use in various types of applications. The device offers a high level of isolation voltage, up to 3000Vrms, and a high current transfer ratio (CTR) between 5% and 250% at an input current of 5mA. Furthermore, it has a high common mode rejection ratio, up to 60dB, and a minimal temperature drift, -30°C to +75°C (Temperature stability typically better than 1°C/mil.).

This specific optoisolator is dual-in-line packaged (DIP) and composed of two parts – the LED and the phototransistor–which are optically coupled in hermetically sealed metal packages. The LED’s terminals are the input pins, while the output pins are dedicated to the phototransistor. The interconnecting pins are for the supply- and ground voltage to energize the LED.

In summary, the PS2501L-4 is a high voltage, general-purpose optoisolator applications including motor drivers, power supplies, communications equipment, and lighting control systems. It grants a high level of electrical isolation of up to 3000Vrms, a wide current transfer ratio, and minimal drift even at higher temperatures. With the corresponding packaging and pinouts, this optoisolator is among the best solutions for these types of application.

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