PS2502L-1-L-A

Optoisolators play an integral role in many industrial and commercial applications. The PS2502L-1-L-A is an optoisolator from Vishay Semiconductor that consists of a light-emitting diode (LED) optically coupled to an output transistor within a four-pin plastic package. The main application areas and the working principle of the PS2502L-1-L-A are discussed below.

Application Areas

The PS2502L-1-L-A is mainly used in control systems, instrumentation, digital logic gates, switching, and switching circuits. Its small package size allows for easy wiring and integration into small spaces. It can also be used in battery-powered equipment as its low current consumption (typical of 5-7mA) does not significantly reduce the battery life.

Other applications include medical equipment, white goods, power supplies, cable and satellite systems, automotive applications, and telecommunications equipment.

Working Principle

The PS2502L-1-L-A comprises an LED optically coupled to an NPN Darlington-connected output transistor. The input and output are electrically isolated allowing for high input to output noise filtering. When the LED is energized, the output transistor turns on. Its output current may vary between 5mA and 30mA depending on the input voltage and the reverse voltage across the output transistor.

The PS2502L-1-L-A is reverse polarity protected, meaning it can operate in either polarity and withstand up to 20V of reverse voltage. The LED is used as an input signal, while the output transistor amplifies it. The output is available as both a logic and analog signal.

Conclusion

The PS2502L-1-L-A optoisolator from Vishay Semiconductor is an ideal solution for applications such as battery-powered equipment, medical equipment, digital logic gates, switching circuits and more. It has a low current consumption, reverse polarity protection, and is variably sensitive and available as both a logic and analog signal output.