EL217(TA)-V

Output Type:	Transistor with Base
Supplier Device Package:	8-SOP
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 110°C
Vce Saturation (Max):	400mV
Current - DC Forward (If) (Max):	60mA
Voltage - Forward (Vf) (Typ):	1.3V
Current - Output / Channel:	--
Voltage - Output (Max):	80V
Series:	--
Input Type:	DC
Rise / Fall Time (Typ):	1.6µs, 2.2µs
Turn On / Turn Off Time (Typ):	3µs, 3µs
Current Transfer Ratio (Max):	--
Current Transfer Ratio (Min):	100% @ 1mA
Voltage - Isolation:	3750Vrms
Number of Channels:	1
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Optoisolators - Transistor, Photovoltaic Output - EL217(TA)-V Application Field and Working Principle

Optoisolators are specialized electrical devices that serve as an electrically isolated interface between an input signal and an output. They are widely used in industries, particle accelerators, communications systems, vehicles, electrical networks, airplanes, spacecraft, and more. The EL217(TA)-V is one of the most commonly used optoisolators. It has a specific application field and its working principle can be understood by examining the three distinct components inside.

Application Field

The EL217(TA)-V is designed to replace both the standard photo-coupled SCRs and phototransistors in applications requiring a highly reliable and low-cost optical component. The EL217(TA)-V has a variety of uses, ranging from on/off power resistor controls to high-speed digital timing circuits.

Working Principle

On the inside, the EL217(TA)-V is composed of three distinct components. The first is a light-sensitive photodiode, which converts the input energy from light into electrical energy. This electrical energy is then amplified using a Darlington pair transistor, which increases the current gain of the amplifier and minimizes distortion. Finally, the photovoltaic output, which generates current output proportional to the input light, is generated. The circuit works as follows. The light-sensitive photodiode absorbs the input light energy and converts it into electrical energy. The electrical energy then passes through a Darlington pair transistor, which amplifies the power, boosts the gain and reduces distortion. The second transistor in the circuit is then fired as the photovoltaic output, which activates the input signal and turns the circuit on or off.

Advantages

The EL217(TA)-V has several advantages over other types of optoisolators. Most notably, it is highly reliable and has a low cost of operation. The circuit also has a fast switching speed and can be used in a variety of applications, ranging from power resistor controls to high-speed digital timing circuits. Finally, the integrated circuit design and temperature compensation features help to minimize the impact of temperature changes on the circuit operation.

Conclusion

The EL217(TA)-V is one of the most commonly used optoisolators on the market. It is designed to replace both the standard photo-coupled SCRs and phototransistors in applications requiring a highly reliable and low-cost optical component. The circuit has three distinct components – a light-sensitive photodiode, a Darlington pair transistor, and a photovoltaic output – all of which work together to replicate an input signal and turn the circuit on or off. Because of its low cost and high reliability, it is an ideal optoisolator for a wide variety of applications.

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