VOL618A-2T Isolators

Output Type:	Transistor
Supplier Device Package:	4-LSOP (2.54mm)
Package / Case:	4-SMD, Gull Wing
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 110°C
Vce Saturation (Max):	400mV
Current - DC Forward (If) (Max):	60mA
Voltage - Forward (Vf) (Typ):	1.16V
Current - Output / Channel:	50mA
Voltage - Output (Max):	80V
Series:	--
Input Type:	DC
Rise / Fall Time (Typ):	3.5µs, 5µs
Turn On / Turn Off Time (Typ):	6µs, 5.5µs
Current Transfer Ratio (Max):	125% @ 1mA
Current Transfer Ratio (Min):	63% @ 1mA
Voltage - Isolation:	5000Vrms
Number of Channels:	1
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Optoisolators - Transistor, Photovoltaic Output

Optoisolators, or optocouplers, are devices that are used to isolate two electrical circuits and protect from short circuits and potential surges. Isolation is accomplished by using either a transistor-based or photovoltaic output device. Transistor output isolators, such as the VOL618A-2T, provide electrical isolation between input and output, and photovoltaic output isolators provide optical isolation between input and output.

VOL618A-2T Application Field

The VOL618A-2T is a transistor output optoisolator used to electrically isolate two electrical circuits. It is most often used in low-noise and high-precision applications. Applications where the VOL618A-2T are commonly utilized are those involving sensitive circuits, such as protection against short circuits or isolation of high voltages. It can also be used in the communication industry, surveillance systems, and power supplies.

VOL618A-2T Working Principle

The VOL618A-2T optoisolator consists of an LED, phototransistor, and resistor. The LED is the emitting source of the device and is connected to the input side of the circuit. When current is applied to the LED, it emits light which is directed at the phototransistor. The phototransistor then receives the light and produces a current in response, and the resistor limits the amount of current drawn by the phototransistor. The phototransistor triggers a voltage on the output side of the optoisolator, which is then sent the desired circuit. This action effectively isolates the two circuits, since the input and output are not connected electrically. This prevents any high voltages or surges on the input side from affecting the output side, and there is no electrical noise from the input transmitted to the output.In addition to providing electrical isolation, the VOL618A-2T also has a low power dissipation and a small package size. This makes it ideal for use in space-constrained applications, as well as improving system performance by reducing heat generation.

Conclusion

The VOL618A-2T is an optoisolator suitable for use in a wide variety of applications. Its low power dissipation and small package size make it ideal for use in storage-constrained systems. The device is able to electrically isolate two circuits by using an LED and phototransistor, effectively protecting circuits from short circuits and potential surges.

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