ACPL-C78A-500E

Product Overview

Category

ACPL-C78A-500E belongs to the category of optocouplers or optoisolators.

Use

Optocouplers are electronic components used to transfer electrical signals between two isolated circuits. They provide electrical isolation and protect sensitive components from voltage spikes, noise, and other disturbances.

Characteristics

• Optocouplers consist of a light-emitting diode (LED) and a phototransistor or photodiode.
• They can transmit signals across an isolation barrier without any direct electrical connection.
• Optocouplers offer high-speed signal transmission and excellent noise immunity.
• They are commonly used in applications requiring galvanic isolation, such as power supplies, motor control, and communication systems.

Package

The ACPL-C78A-500E optocoupler is available in a compact and industry-standard 8-pin DIP (Dual Inline Package) package.

Essence

The essence of the ACPL-C78A-500E optocoupler lies in its ability to provide electrical isolation and signal transmission between two separate circuits.

Packaging/Quantity

The ACPL-C78A-500E optocoupler is typically packaged in reels or tubes, with a quantity of 50 units per reel/tube.

Specifications

• Isolation Voltage: 3750 Vrms
• Collector-Emitter Voltage: 70 V
• Current Transfer Ratio: 100% to 200%
• Rise Time: 3 µs
• Fall Time: 2 µs
• Operating Temperature Range: -40°C to +100°C

Detailed Pin Configuration

1. Anode (LED)
2. Cathode (LED)
3. Emitter (Phototransistor)
4. Collector (Phototransistor)
5. Base (Phototransistor)
6. Not Connected
7. Collector (Phototransistor)
8. Emitter (Phototransistor)

Functional Features

• The ACPL-C78A-500E optocoupler provides high-speed signal transmission with minimal propagation delay.
• It offers excellent noise immunity, making it suitable for applications in noisy environments.
• The optocoupler's compact package allows for easy integration into various electronic circuits.
• It has a wide operating temperature range, enabling reliable performance in extreme conditions.

Advantages and Disadvantages

Advantages

• Provides electrical isolation between input and output circuits.
• High-speed signal transmission.
• Excellent noise immunity.
• Compact package for easy integration.
• Wide operating temperature range.

Disadvantages

• Limited maximum collector-emitter voltage.
• Requires additional circuitry for proper operation.
• Sensitive to ambient light interference.

Working Principles

The ACPL-C78A-500E optocoupler operates based on the principle of optical coupling. When an electrical signal is applied to the LED (anode and cathode), it emits light. This light is then detected by the phototransistor or photodiode (emitter, collector, and base), which generates a corresponding electrical signal. The input and output circuits are electrically isolated, allowing for safe signal transmission.

Detailed Application Field Plans

The ACPL-C78A-500E optocoupler finds applications in various fields, including:

1. Power Supplies: Isolating control signals in switch-mode power supplies to prevent voltage spikes from damaging sensitive components.
2. Motor Control: Providing isolation between microcontrollers and motor driver circuits to protect against electrical noise and voltage transients.
3. Communication Systems: Isolating data signals in communication interfaces to eliminate ground loops and improve signal integrity.
4. Industrial Automation: Enabling safe and reliable communication between control systems and high-voltage equipment.

Detailed and Complete Alternative Models

1. ACPL-C78B-500E: Similar to ACPL-C78A-500E, but with a higher collector-emitter voltage rating.
2. ACPL-C78C-500E: Similar to ACPL-C78A-500E, but with a lower current transfer ratio.
3. ACPL-C78D-500E: Similar to ACPL-C78A-500E, but with faster rise and fall times.

These alternative models offer similar functionality but may have different specifications or performance characteristics to suit specific application requirements.

Word count: 511 words