EL8172IS-T7

Product Overview

• Category: Optocoupler
• Use: Isolation and signal transmission between two electrical circuits
• Characteristics: High-speed, high-gain, low power consumption
• Package: Surface Mount Device (SMD)
• Essence: Phototransistor Output Optocoupler
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Isolation Voltage: 5000 Vrms
• Collector-Emitter Voltage: 80 V
• Emitter-Collector Voltage: 5 V
• Collector Current: 50 mA
• Power Dissipation: 150 mW
• Operating Temperature Range: -55°C to +110°C

Pin Configuration

The EL8172IS-T7 optocoupler has a total of 4 pins:

1. Anode (A): Connects to the anode of the internal LED.
2. Cathode (K): Connects to the cathode of the internal LED.
3. Collector (C): Connects to the collector of the internal phototransistor.
4. Emitter (E): Connects to the emitter of the internal phototransistor.

Functional Features

• High-speed response: The EL8172IS-T7 offers fast switching times, making it suitable for applications requiring quick signal transmission.
• High gain: The optocoupler provides high current transfer ratio, ensuring efficient signal amplification.
• Low power consumption: With its low power dissipation, the EL8172IS-T7 helps conserve energy in electronic systems.

Advantages and Disadvantages

Advantages

• Provides electrical isolation between input and output circuits, protecting sensitive components from voltage spikes or noise.
• Compact SMD package allows for space-saving integration in PCB designs.
• Wide operating temperature range enables reliable performance in various environments.

Disadvantages

• Limited collector-emitter voltage and current ratings may restrict its use in high-power applications.
• Requires external resistors for proper operation, adding complexity to the circuit design.

Working Principles

The EL8172IS-T7 optocoupler consists of an LED and a phototransistor enclosed in a single package. When a forward bias voltage is applied to the LED (Anode connected to positive voltage and Cathode connected to ground), it emits light. This emitted light activates the phototransistor, causing it to conduct current between the Collector and Emitter terminals. The amount of current flowing through the phototransistor depends on the intensity of the light received from the LED.

Detailed Application Field Plans

The EL8172IS-T7 optocoupler finds application in various fields, including:

1. Industrial Automation: Isolation and signal transmission in PLCs (Programmable Logic Controllers) and motor control systems.
2. Telecommunications: Signal isolation in communication equipment, such as modems and routers.
3. Medical Devices: Isolation and protection of sensitive components in medical equipment, ensuring patient safety.
4. Power Electronics: Isolation and feedback control in power supplies and inverters.
5. Automotive: Signal transmission and noise suppression in automotive electronics, such as engine control units and ABS systems.

Detailed and Complete Alternative Models

1. PC817: Phototransistor Output Optocoupler with similar specifications and pin configuration.
2. MOC3021: Optoisolator Triac Driver with higher voltage and current ratings.
3. TLP521-4: Photocoupler with Phototransistor Output, offering multiple channels for simultaneous signal transmission.

(Note: These alternative models are provided as examples and may not be direct replacements for the EL8172IS-T7. It is recommended to refer to the respective datasheets for detailed specifications and suitability for specific applications.)

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