EL8172ISZ-T13

Product Overview

Category: Optocoupler
Use: Signal isolation and voltage level shifting
Characteristics: High-speed, high-gain, low-power consumption
Package: SOP-4
Essence: Phototransistor output optocoupler
Packaging/Quantity: Tape and reel, 2500 units per reel

Specifications

• Isolation Voltage: 3750 Vrms
• Collector-Emitter Voltage: 80 V
• Current Transfer Ratio (CTR): 50% to 600%
• Rise Time: 18 µs
• Fall Time: 15 µs
• Forward Current: 50 mA
• Power Dissipation: 70 mW
• Operating Temperature Range: -40°C to +100°C

Detailed Pin Configuration

The EL8172ISZ-T13 optocoupler has a total of four pins:

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

Functional Features

• High-speed response: The EL8172ISZ-T13 offers fast switching times, making it suitable for applications requiring quick signal transmission.
• High gain: The optocoupler provides a high current transfer ratio (CTR), ensuring efficient signal amplification.
• Low power consumption: With a low forward current requirement, the device minimizes energy usage.
• Phototransistor output: The optocoupler utilizes a phototransistor as its output device, providing improved linearity and sensitivity.

Advantages and Disadvantages

Advantages: - Fast response time enables high-speed signal transmission. - High gain allows for effective signal amplification. - Low power consumption reduces energy usage.

Disadvantages: - Limited collector-emitter voltage may restrict certain applications. - The device is sensitive to ambient light, requiring proper shielding in bright environments.

Working Principles

The EL8172ISZ-T13 optocoupler operates by utilizing an infrared LED and a phototransistor. When a current is applied to the LED, it emits infrared light. This light is then detected by the phototransistor, causing it to conduct current between its collector and emitter terminals. The optocoupler provides electrical isolation between the input and output sides, allowing for signal transmission without direct electrical connection.

Detailed Application Field Plans

The EL8172ISZ-T13 finds application in various fields, including:

1. Industrial automation: Signal isolation and level shifting in control systems.
2. Telecommunications: Voltage level shifting in communication circuits.
3. Power electronics: Isolation of high-voltage signals in power converters.
4. Automotive electronics: Signal conditioning and isolation in automotive systems.
5. Medical equipment: Isolation of sensitive signals in medical devices.

Detailed and Complete Alternative Models

1. EL817C: Phototransistor output optocoupler with higher collector-emitter voltage rating.
2. PC817: Photocoupler with similar characteristics but in a different package (DIP-4).
3. TLP521-4: Optocoupler with higher isolation voltage and lower CTR range.
4. SFH620A-3: Phototransistor output optocoupler with faster rise and fall times.

These alternative models offer similar functionality and can be considered as substitutes for the EL8172ISZ-T13 depending on specific requirements.

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