FOD2741CSDV

Input Type:	DC
Supplier Device Package:	8-SMD
Package / Case:	8-SMD, Gull Wing
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Vce Saturation (Max):	400mV
Voltage - Forward (Vf) (Typ):	1.5V (Max)
Current - Output / Channel:	50mA
Voltage - Output (Max):	30V
Output Type:	Transistor
Series:	--
Rise / Fall Time (Typ):	--
Turn On / Turn Off Time (Typ):	--
Current Transfer Ratio (Max):	200% @ 10mA
Current Transfer Ratio (Min):	100% @ 10mA
Voltage - Isolation:	5000Vrms
Number of Channels:	1
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Optoisolators - Transistor, Photovoltaic Output

The FOD2741CSDV optoisolator comprises a Phototransistor Output Optocoupler. An optocoupler, also known as a photocoupler, is an optical device that uses light to transfer an electrical signal from one circuit to another. This isolates the two circuits, preventing high voltages or ground loop problems. The FOD2741CSDV is a widely used optocoupler in industrial applications.

Application Field

The FOD2741CSDV is a popular choice amongst industrial control and power supply applications due to its reliable voltage transfer performance. It makes it ideal for controlling contactors, relays, and other switching devices, as it can be used in both DC and AC circuits with high voltages. The device is given full-load voltage ratings of 600V and a maximum load current of 5A, making it suited to applications requiring power switching.The FOD2741CSDV is also used in integrated circuits such as timers, counters, and voltage regulators. Its high isolation voltage rating of 3kV is also suited to medical equipment applications where increased voltage levels have to be isolated to protect personnel.

Working Principle

The FOD2741CSDV optoisolator consists of a light emitting diode (LED) surrounded by a photo-transistor in a plastic case. Light from the LED is directed towards the collector of the photo-transistor, and a current passing through the LED creates a photocurrent in the photo-transistor’s collector-base junction. This induces a small signal current of the same direction in the photo-transistor’s emitter, and a voltage drop across a resistor connected to the emitter.The current induced into the photo-transistor is proportional to the current flowing through the LED, which in turn is proportional to the input voltage applied at the input terminal. The collector of the photo-transistor is connected to the output terminal of the optoisolator and the varying current results in a proportional output voltage signal depending on the input signal. The optoisolator isolates the input and output circuits by several orders of magnitude, and as such has a high insulation rating as well as superb electrical properties. For this reason it is well suited to industrial applications where grounding loops or electrical interference need to be eliminated.

Conclusion

The FOD2741CSDV optoisolator is a widely used device in industrial control applications. The device offers high isolation voltage ratings as well as full-load current ratings of 5A. Its ability to transfer signals between circuits via light makes it well suited to applications requiring power switching, such as motor control or counter circuits. Highly effective insulation and electrical properties make the FOD2741CSDV an ideal choice for any industrial application requiring long life ground loop isolation and optimal noise reduction.

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