PS2802-1-F3

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Optoisolators are a type of electrical isolation device that uses an optical signal to isolate two circuits from each other. PS2802-1-F3 is a 6-pin surface-mount optoisolator with transistor, photovoltaic output. This optoisolator can be used to link two different electrical circuits that must remain isolated from each other.

The PS2802-1-F3 is constructed with a gallium arsenide infrared (GaAs IR) light-emitting diode (LED) and a photovoltaic output transistor. The LED is connected to a low voltage, low-current input circuit, while the photovoltaic output transistor is connected to a high voltage, high-current output circuit. The LED is optically coupled to the photovoltaic transistor, allowing them to function independently but still be linked via the light beam passing between them.

The internal structure of the PS2802-1-F3 includes four diodes-two protection diodes on the input and two in series on the output. These diodes are intended to protect the device from transients and overvoltage conditions. In addition, a thermal cutoff fuse is present to protect the device from excessive power dissipation. The package includes four terminals-an input (LED) anode, an LED cathode, an output (collector) and a common terminal.

When the output terminal is connected to the ground and a DC voltage is applied to the input terminal, the LED emits light, which is then absorbed by the photovoltaic transistor. This causes a small current to flow to the output terminal, which is amplified by the internal transistor and appears as a low impedance output voltage signal. The level of the output signal depends on the input voltage, with a maximum output voltage of around 28V.

The PS2802-1-F3 optoisolator is mainly used in industrial, automotive and medical applications. It is a common choice for digital and analog input-output (I/O) isolation, surge protection and signal level protection. It is also suitable for smog sensor applications and EMI/RFI noise filtering. Its high optical efficiency and low input voltage allow it to be used in a variety of applications.

For applications requiring higher power output, the PS2802-1-F3 can also be used in combination with a MOSFET or IGBT gate driver circuit. This increases the output power of the optoisolator and makes it capable of driving loads up to several hundreds of watts.

The PS2802-1-F3 optoisolator is a reliable and economical solution for providing electrical isolation in a wide variety of applications. Its compact size and easy to use interface make it an ideal choice for applications that require optical isolation.

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