Output Type:	Transistor
Supplier Device Package:	4-SMD
Package / Case:	4-SMD, Gull Wing
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 110°C
Vce Saturation (Max):	200mV
Current - DC Forward (If) (Max):	60mA
Voltage - Forward (Vf) (Typ):	1.2V
Current - Output / Channel:	50mA
Voltage - Output (Max):	80V
Series:	--
Input Type:	DC
Rise / Fall Time (Typ):	6µs, 8µs
Turn On / Turn Off Time (Typ):	--
Current Transfer Ratio (Max):	400% @ 5mA
Current Transfer Ratio (Min):	200% @ 5mA
Voltage - Isolation:	5000Vrms
Number of Channels:	1
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Optoisolators - Transistor, Photovoltaic Output

Optoisolators, such as the EL817(S1)(C)(TD)-G, are optoelectronic components which provide electrical isolation between a driver and a receiver in its environment. This isolation makes it ideal for noisy and electrically hazardous conditions. EL817(S1)(C)(TD)-G is a 4-pin optoisolator which combines an infrared (IR) LED with a photovoltaicoutput transistor.

Appication Field of EL817(S1)(C)(TD)-G

EL817(S1)(C)(TD)-G optoisolator can be applied to a wide variety of isolation applications, such as current loop isolators, motor speed controllers, or AC signal isolators. It is commonly used in industrial control systems, audio lines, and telecommunications. It can also be used to safely isolate logic input, logic output, microcontroller I/O, and other circuits.

Working Principle of EL817(S1)(C)(TD)-G

The operation of EL817(S1)(C)(TD)-G optoisolator relies on the photovoltaic principle. An LED is built in the device which emits infrared light when electrically driven. This light is converted into electrical energy when received by the internal photodiode. This electrical energy is then converted into an output load by the phototransistoroutput stage.The output current is detected by the phototransistor and the current is converted to an electrical voltage. When the voltage level is higher than the cutoff level, the transistor will turn on and increase the load current. When the voltage level drops below the cutoff voltage, the phototransistor will turn off and reduce the load current.The maximum allowed input current is typically 10mA. By controlling the current through the LED, this allows control of the phototransistor, which in turn controls the load current.

Features of EL817(S1)(C)(TD)-G

EL817(S1)(C)(TD)-G optoisolator is compact and reliable, requiring no additional components to provide high speed switching and reliable isolation from hazardous conditions. It offers excellent electrical isolation with common-mode rejection up to 2000Vrms, as well as high speed response with a minimum pulse width of 16ns. It is also designed to prevent the build-up of static electricity and has an extended operating temperature range from -40°C to 85°C. In addition, it has an on-state voltage drop of 0.8V for both NPN and PNP transistors.In conclusion, EL817(S1)(C)(TD)-G optoisolator is an excellent choice for isolation applications due to its high speed switching, reliable performance, good electrical isolation, and compact size. It is designed to provide an efficient way to isolate complex circuits from hazardous conditions and allow communication between two different systems.

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