L7808ACF

Product Overview

• Category: Voltage Regulator
• Use: To regulate and stabilize the output voltage in electronic circuits
• Characteristics:
  • Fixed output voltage of 8V
  • Maximum output current of 1.5A
  • Low dropout voltage
  • Thermal overload protection
• Package: TO-220
• Essence: Integrated circuit (IC)
• Packaging/Quantity: Typically sold in reels or tubes containing multiple units

Specifications

• Input Voltage Range: 10V to 35V
• Output Voltage: 8V
• Output Current: Up to 1.5A
• Dropout Voltage: 2V (maximum)
• Operating Temperature Range: -40°C to +125°C
• Line Regulation: 0.04% (typical)
• Load Regulation: 0.3% (typical)
• Ripple Rejection Ratio: 62dB (typical)

Detailed Pin Configuration

The L7808ACF voltage regulator has three pins:

1. Input Pin (VIN): Connects to the input voltage source.
2. Ground Pin (GND): Connected to the ground reference.
3. Output Pin (VOUT): Provides the regulated output voltage.

Functional Features

• Voltage Regulation: The L7808ACF maintains a constant output voltage of 8V, regardless of variations in the input voltage or load conditions.
• Thermal Overload Protection: The IC includes built-in thermal shutdown circuitry that protects it from overheating.
• Short Circuit Protection: The device is designed to withstand short-circuit conditions without damage.
• Low Dropout Voltage: The regulator can operate with a very small voltage difference between the input and output, minimizing power dissipation.

Advantages and Disadvantages

Advantages: - Easy to use and integrate into electronic circuits - Provides a stable output voltage - Offers protection against thermal overload and short circuits - Low dropout voltage minimizes power dissipation

Disadvantages: - Fixed output voltage may not be suitable for all applications - Limited maximum output current of 1.5A

Working Principles

The L7808ACF is a linear voltage regulator that uses a series pass transistor to regulate the output voltage. It compares the output voltage with a reference voltage and adjusts the pass transistor accordingly to maintain a constant output voltage. The device also includes internal circuitry for thermal and short circuit protection.

Detailed Application Field Plans

The L7808ACF is commonly used in various electronic applications, including:

1. Power Supply Units (PSUs)
2. Battery Chargers
3. Audio Amplifiers
4. Industrial Control Systems
5. Automotive Electronics

Detailed and Complete Alternative Models

• LM7808: Similar voltage regulator from Texas Instruments
• UA7808: Voltage regulator from Fairchild Semiconductor
• MC7808: Voltage regulator from ON Semiconductor

These alternative models offer similar functionality and can be used as substitutes for the L7808ACF in many applications.

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