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L7808ABF
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L7808ABF

Product Overview

  • Category: Integrated Circuit
  • Use: Voltage Regulator
  • Characteristics: Fixed Output, Positive Voltage Regulator
  • Package: TO-220
  • Essence: Linear Regulator
  • Packaging/Quantity: Tube/50 pieces

Specifications

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

Pin Configuration

The L7808ABF voltage regulator has three pins:

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

Functional Features

  • Fixed Output Voltage: The L7808ABF provides a fixed output voltage of 8V, making it suitable for various applications requiring a stable voltage supply.
  • Internal Thermal Overload Protection: The regulator includes internal thermal shutdown circuitry that protects the device from excessive temperature, ensuring safe operation.
  • Short Circuit Protection: The L7808ABF is equipped with short circuit protection, preventing damage to the device in case of a short circuit on the output.
  • High Ripple Rejection: With a high ripple rejection ratio, the regulator minimizes the impact of input voltage fluctuations on the output voltage stability.

Advantages and Disadvantages

Advantages: - Easy to use and integrate into electronic circuits. - Stable and reliable output voltage. - Internal protection features enhance device durability. - Suitable for a wide range of applications.

Disadvantages: - Linear regulators are less efficient compared to switching regulators, resulting in higher power dissipation. - Limited input voltage range.

Working Principles

The L7808ABF is a linear voltage regulator that uses a series pass transistor to regulate the output voltage. It operates by comparing the reference voltage with the feedback voltage obtained from a voltage divider connected to the output. The error amplifier adjusts the pass transistor to maintain a constant output voltage despite changes in the input voltage or load conditions.

Detailed Application Field Plans

The L7808ABF is commonly used in various electronic devices and systems, including:

  1. Power Supplies: It can be employed as a voltage regulator in power supply circuits to provide a stable 8V output for powering microcontrollers, sensors, and other components.
  2. Automotive Electronics: The regulator finds applications in automotive systems, such as engine control units (ECUs), where a reliable and regulated voltage source is crucial.
  3. Industrial Control Systems: It is suitable for use in industrial control systems, providing a stable voltage for analog and digital circuitry.
  4. Consumer Electronics: The L7808ABF can be utilized in consumer electronics products like audio amplifiers, set-top boxes, and LED lighting systems.

Detailed and Complete Alternative Models

  1. LM7808: This is a popular alternative from Texas Instruments with similar specifications and pin configuration.
  2. MC7808: Manufactured by ON Semiconductor, it offers comparable performance and compatibility with the L7808ABF.
  3. UA7808: A voltage regulator from Fairchild Semiconductor, which serves as an alternative choice for the L7808ABF.

These alternative models can be considered based on availability, pricing, and specific application requirements.

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技術ソリューションにおける L7808ABF の適用に関連する 10 件の一般的な質問と回答をリストします。

Sure! Here are 10 common questions and answers related to the application of L7808ABF in technical solutions:

  1. Q: What is L7808ABF? A: L7808ABF is a voltage regulator IC that provides a fixed output voltage of +8V.

  2. Q: What is the input voltage range for L7808ABF? A: The input voltage range for L7808ABF is typically between 10V and 35V.

  3. Q: What is the maximum output current of L7808ABF? A: The maximum output current of L7808ABF is 1.5A.

  4. Q: Can L7808ABF handle higher input voltages than 35V? A: No, it is not recommended to exceed the maximum input voltage range of 35V for L7808ABF.

  5. Q: Is L7808ABF suitable for both AC and DC input voltages? A: Yes, L7808ABF can handle both AC and DC input voltages.

  6. Q: Does L7808ABF require any external components for operation? A: Yes, L7808ABF requires input and output capacitors for stability and filtering.

  7. Q: Can L7808ABF be used in automotive applications? A: Yes, L7808ABF is suitable for automotive applications as it can handle the required voltage and current levels.

  8. Q: What is the thermal resistance of L7808ABF? A: The thermal resistance of L7808ABF is typically around 50°C/W.

  9. Q: Can L7808ABF be used in high-temperature environments? A: Yes, L7808ABF can operate in temperatures up to 150°C, making it suitable for high-temperature applications.

  10. Q: Is L7808ABF available in different package types? A: Yes, L7808ABF is available in various package types, including TO-220 and D²PAK.

Please note that these answers are general and may vary depending on the specific datasheet and manufacturer's specifications of L7808ABF.