FOD617B3SD

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Optoisolators - Transistor, Photovoltaic Output are commonly used to protect driving devices from damage due to over-voltage and massive current surges. The FOD617B3SD is an integrated optoisolator designed for such applications; it consists of a photo sensor, an isolator, a transistor output and an insulator. This device is able to provide opto-coupled isolation between input and output, allowing for safer operation.

FOD617B3SD Overview

FOD617B3SD is constructed with a aluminum gallium arsenide (AlGaAs) infrared diode. Its extremely fast response time, low propagating delay, and high accuracy makes it a reliable optoisolator in numerous applications. The FOD617B3SD is a DARLINGTON type optocoupler which features a very high current transfer ratio (CTR). It has a high insulation voltage up to 50 VAC/VDC.

The package size for the FOD617B3SD is very small, at just 6.17 x 4.6 mm. The device operates at a temperature range of -40°C to +85°C. It is compact, low power, and highly reliable.

FOD617B3SD Applications

The FOD617B3SD is typically used in applications such as:

• High temperature sensing
• Machine condition monitoring
• Overcurrent detection
• Lighting control
• Intelligent power control

The device is suitable for use in numerous industrial and technological applications, such as automation, motion control, medical and laboratory equipment, and consumer electronics.

FOD617B3SD Working Principle

The FOD617B3SD optoisolator works by converting an input current to a light signal. The light is then modulated by the internal opto-coupler and applications will be able to detect it. The working principle of an optocoupler is as follows:

• The device consists of an infrared diode and a potentiometer connected in series with a DC voltage source.
• When the input voltage is connected to the cathode of the diode (the negative terminal), the pot

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