EL354(TA)

Output Type:	Transistor
Supplier Device Package:	4-SOP (2.54mm)
Package / Case:	4-SMD, Gull Wing
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 100°C
Vce Saturation (Max):	200mV
Current - DC Forward (If) (Max):	50mA
Voltage - Forward (Vf) (Typ):	1.2V
Current - Output / Channel:	--
Voltage - Output (Max):	80V
Series:	--
Input Type:	AC, DC
Rise / Fall Time (Typ):	6µs, 8µs
Turn On / Turn Off Time (Typ):	--
Current Transfer Ratio (Max):	300% @ 1mA
Current Transfer Ratio (Min):	20% @ 1mA
Voltage - Isolation:	3750Vrms
Number of Channels:	1
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

Optoisolators are used in a variety of applications across a wide range of industries, from medical devices to industrial control systems. EL354(TA) is a type of optoisolator, specifically a Transistor-Photovoltaic Output type (TPO). This article explains the working principle and applications of the EL354(TA) optoisolator.

Overview

The EL354(TA) optoisolator is a single-channel optical-coupled transistor-photovoltaic output device designed for signal and power isolation applications. It uses a high-intensity infra-red light emitting diode (LED), and two integrated isolation elements (transistor and photovoltaic element) to achieve electrical isolation between two interfaces. A metal reflecting base is used to increase the efficiency of the device. The device also has a high common-mode transient immunity and a high isolation voltage rating, making it suitable for use in a variety of industrial and consumer applications.

Working Principle

The EL354(TA) optoisolator works by converting an electrical signal into an infra-red light signal. The electrical signal is sent to the LED, which produces a beam of infra-red light when the current flows through it. The infra-red light beam is then detected by the photovoltaic element, which converts it into a low-level voltage signal. The transistor then amplifies this voltage signal and sends it back out. This process creates electrical isolation between the two interfaces and ensures that any noise or interference is not transferred between the two.

Advantages

The EL354(TA) optoisolator has several advantages over other optoisolators. It is much faster than other optoisolators, with a response time of 2.5ns. It also has a high isolation voltage rating (2500Vrms), making it suitable for use in high voltage applications. In addition, the transmitter has a wide range of output wavelengths and it is very efficient, with power dissipation of only 2mW.

Applications

The EL354(TA) optoisolator has a wide range of applications in medical, industrial, and automotive industries. It can be used in electronic instrumentation to provide electrical isolation between two circuits or two different components. It can also be used to create electrical isolation for signal and power transmission. It is also widely used in motor controllers, programmable logic controllers (PLC), switching power supplies, power monitors, and UPS systems. The optoisolator is also used for optically coupling modulated light signals over long distances.

Conclusion

The EL354(TA) optoisolator is a versatile device that can be used in a variety of applications. It has a fast response time, high isolation voltage rating, wide range of output wavelengths, and low power dissipation, making it suitable for use in industrial, medical, and automotive applications.

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