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L4979D-E
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L4979D-E

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Power Management
  • Characteristics: High voltage, high current, low dropout voltage regulator
  • Package: TO-220
  • Essence: Voltage regulator with adjustable output voltage and current limiting capabilities
  • Packaging/Quantity: Available in tape and reel packaging, quantity varies based on supplier

Specifications

  • Input Voltage Range: 4.75V to 40V
  • Output Voltage Range: 1.2V to 37V
  • Output Current: Up to 1.5A
  • Dropout Voltage: 1.5V typical at 1A load
  • Quiescent Current: 10mA typical
  • Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The L4979D-E IC has the following pin configuration:

  1. GND: Ground connection
  2. Vout: Output voltage
  3. Vin: Input voltage
  4. ADJ: Adjustable pin for setting the output voltage
  5. NC: No Connection
  6. NC: No Connection
  7. NC: No Connection
  8. NC: No Connection

Functional Features

  • Adjustable output voltage through the ADJ pin
  • Overcurrent protection with current limiting
  • Thermal shutdown protection
  • Short-circuit protection
  • Low dropout voltage for efficient power management
  • Wide input voltage range for versatile applications

Advantages and Disadvantages

Advantages

  • High voltage and current handling capability
  • Adjustable output voltage for flexibility
  • Built-in protection features for enhanced reliability
  • Low dropout voltage for efficient power conversion
  • Wide operating temperature range for various environments

Disadvantages

  • Limited output current compared to some other regulators
  • Requires external components for proper operation
  • Higher cost compared to basic linear regulators

Working Principles

The L4979D-E is a voltage regulator that uses a feedback mechanism to maintain a stable output voltage. The adjustable output voltage is set using the ADJ pin, which allows for customization based on specific application requirements. The IC also incorporates current limiting and thermal shutdown protection to prevent damage due to excessive current or temperature.

When the input voltage exceeds the desired output voltage, the internal circuitry reduces the voltage difference across the regulator, resulting in a lower dropout voltage. This ensures efficient power conversion and minimizes power dissipation.

Detailed Application Field Plans

The L4979D-E is commonly used in various applications that require regulated power supply. Some of the typical application fields include:

  1. Industrial automation systems
  2. Automotive electronics
  3. Telecommunications equipment
  4. Power management in consumer electronics
  5. LED lighting systems
  6. Battery charging circuits

Detailed and Complete Alternative Models

  • LM317: Adjustable voltage regulator with similar features
  • LT1083: High current, adjustable voltage regulator
  • LM1117: Low dropout voltage regulator with fixed output voltage options
  • LM7805: Fixed 5V voltage regulator for low-power applications
  • LM2940: Low dropout voltage regulator with adjustable output voltage

These alternative models offer different specifications and features, allowing users to choose the most suitable option based on their specific requirements.

In conclusion, the L4979D-E is a versatile voltage regulator IC that offers adjustable output voltage, high voltage and current handling capabilities, and built-in protection features. It finds applications in various fields such as industrial automation, automotive electronics, and telecommunications. Users can also consider alternative models depending on their specific needs.

技術ソリューションにおける L4979D-E 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 L4979D-E in technical solutions:

  1. Q: What is L4979D-E? A: L4979D-E is a specific model of a power management integrated circuit (IC) designed for various technical applications.

  2. Q: What are the key features of L4979D-E? A: Some key features of L4979D-E include high efficiency, low standby power consumption, overvoltage protection, thermal shutdown, and adjustable output voltage.

  3. Q: What are the typical applications of L4979D-E? A: L4979D-E is commonly used in applications such as industrial automation, motor control systems, robotics, power supplies, and battery charging circuits.

  4. Q: How does L4979D-E help in motor control systems? A: L4979D-E provides efficient power management and control for motors, allowing precise speed and torque control, while also protecting against overvoltage and thermal issues.

  5. Q: Can L4979D-E be used in battery charging circuits? A: Yes, L4979D-E can be used in battery charging circuits to regulate the charging process, prevent overcharging, and ensure optimal charging efficiency.

  6. Q: Does L4979D-E support adjustable output voltage? A: Yes, L4979D-E has an adjustable output voltage feature that allows users to set the desired output voltage level based on their specific requirements.

  7. Q: What is the standby power consumption of L4979D-E? A: L4979D-E has a low standby power consumption, typically in the microampere range, which helps in reducing overall power wastage.

  8. Q: How does L4979D-E protect against overvoltage? A: L4979D-E has built-in overvoltage protection mechanisms that monitor the output voltage and automatically shut down the circuit if it exceeds a predefined threshold.

  9. Q: What is the thermal shutdown feature of L4979D-E? A: The thermal shutdown feature in L4979D-E protects the IC from overheating by shutting down the circuit when the temperature exceeds a certain limit.

  10. Q: Can L4979D-E be used in high-power applications? A: Yes, L4979D-E can handle relatively high power levels, making it suitable for various high-power applications such as industrial automation systems and motor control solutions.

Please note that these answers are general and may vary depending on the specific implementation and requirements of your technical solution.