EL8172ISZ-T7

Product Overview

Category

EL8172ISZ-T7 belongs to the category of optocouplers or optoisolators.

Use

Optocouplers are electronic devices that use light to transfer electrical signals between two isolated circuits. They are commonly used to provide electrical isolation in applications where there is a need to protect sensitive components from high voltages or noise.

Characteristics

• Optocouplers consist of an LED (light-emitting diode) and a phototransistor or photodiode.
• They provide galvanic isolation, preventing direct electrical contact between input and output circuits.
• Optocouplers can transmit signals across different voltage levels.
• They offer high noise immunity and can withstand high common-mode transient immunity.

Package

EL8172ISZ-T7 is available in a small outline package (SOP) with 4 pins.

Essence

The essence of EL8172ISZ-T7 is to provide electrical isolation and signal transmission between two circuits using light.

Packaging/Quantity

EL8172ISZ-T7 is typically packaged in reels or tubes and is available in quantities of 1000 units per reel/tube.

Specifications

• Isolation Voltage: 3750 Vrms
• Collector-Emitter Voltage: 80 V
• Current Transfer Ratio: 50% to 600%
• Rise Time: 18 µs
• Fall Time: 15 µs
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

1. Anode (A)
2. Cathode (K)
3. Emitter (E)
4. Collector (C)

Functional Features

• High isolation voltage ensures safe operation between input and output circuits.
• Wide operating temperature range allows for usage in various environments.
• Fast rise and fall times enable efficient signal transmission.
• High current transfer ratio provides reliable signal amplification.

Advantages

• Provides electrical isolation, protecting sensitive components from high voltages and noise.
• Allows for signal transmission across different voltage levels.
• Offers high noise immunity and common-mode transient immunity.
• Small package size allows for space-saving in circuit design.

Disadvantages

• Limited operating temperature range may restrict usage in extreme environments.
• Rise and fall times may not be suitable for applications requiring very fast signal transmission.
• Requires careful handling of the LED to avoid damage during assembly.

Working Principles

EL8172ISZ-T7 works based on the principle of optoelectronics. When a current is applied to the LED (Anode and Cathode), it emits light. This light is then detected by the phototransistor or photodiode (Emitter and Collector), which converts it back into an electrical signal. The electrical signal is then amplified and transmitted to the output circuit, providing electrical isolation between the input and output.

Detailed Application Field Plans

EL8172ISZ-T7 finds applications in various fields, including: 1. Power supply circuits 2. Industrial control systems 3. Medical equipment 4. Telecommunications 5. Automotive electronics

In power supply circuits, it can be used to provide galvanic isolation between the primary and secondary sides of a transformer. In industrial control systems, it can protect sensitive control components from high voltages or noise. In medical equipment, it can ensure patient safety by isolating the input and output circuits. In telecommunications and automotive electronics, it can transmit signals across different voltage levels while maintaining isolation.

Detailed and Complete Alternative Models

1. PC817 - Optocoupler with similar specifications and pin configuration.
2. TLP621 - Optocoupler with higher isolation voltage and faster rise/fall times.
3. SFH617A - Optocoupler with higher current transfer ratio and wider operating temperature range.
4. PS2501-1 - Optocoupler with higher collector-emitter voltage and lower rise/fall times.

These alternative models can be considered based on specific application requirements and desired performance characteristics.

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