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L4979D
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L4979D

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Power Management
  • Characteristics: High voltage, high current, low dropout voltage regulator
  • Package: Dual-In-Line (DIP)
  • Essence: Voltage regulator with built-in protection features
  • Packaging/Quantity: Available in tubes or reels, quantity varies depending on supplier

Specifications

  • Input Voltage Range: 4.75V to 60V
  • Output Voltage Range: 2.5V to 55V
  • Output Current: Up to 1.5A
  • Dropout Voltage: 1.5V at 1A
  • Quiescent Current: 10mA
  • Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The L4979D IC has a total of 16 pins, which are assigned specific functions as follows:

  1. Vref: Reference voltage output
  2. GND: Ground connection
  3. Vin: Input voltage
  4. Vout: Output voltage
  5. Sense: Voltage sense input
  6. NC: No connection
  7. NC: No connection
  8. NC: No connection
  9. NC: No connection
  10. NC: No connection
  11. NC: No connection
  12. NC: No connection
  13. NC: No connection
  14. NC: No connection
  15. NC: No connection
  16. NC: No connection

Functional Features

  • Built-in overvoltage protection
  • Thermal shutdown protection
  • Short-circuit protection
  • Adjustable output voltage
  • Low dropout voltage
  • Wide input voltage range
  • High efficiency

Advantages and Disadvantages

Advantages: - Provides stable output voltage even under varying input conditions - Offers protection against overvoltage, thermal shutdown, and short-circuits - Can handle high input voltage range - Low dropout voltage ensures efficient power conversion

Disadvantages: - Limited output current capacity (up to 1.5A) - Requires external components for proper operation - Higher cost compared to basic linear regulators

Working Principles

The L4979D is a linear voltage regulator that operates by maintaining a constant output voltage regardless of changes in the input voltage or load conditions. It achieves this through a feedback mechanism that adjusts the internal circuitry to compensate for variations.

When the input voltage exceeds the desired output voltage, the built-in overvoltage protection activates, preventing any damage to the connected devices. In case of excessive heat, the thermal shutdown feature shuts down the regulator to avoid overheating.

The adjustable output voltage allows users to set the desired voltage level within the specified range using external resistors. This flexibility makes the L4979D suitable for various applications.

Detailed Application Field Plans

The L4979D is commonly used in applications where a stable and regulated power supply is required. Some typical application fields include:

  1. Industrial automation systems
  2. Automotive electronics
  3. Telecommunications equipment
  4. Power distribution systems
  5. Battery charging circuits
  6. LED lighting systems
  7. Audio amplifiers
  8. Motor control circuits

Detailed and Complete Alternative Models

  1. LM317: Adjustable voltage regulator with similar features but lower input voltage range.
  2. LT1083: High-current linear regulator with adjustable output voltage and low dropout voltage.
  3. LM7805: Fixed voltage regulator with 5V output and higher current capacity.
  4. LM1117: Low dropout voltage regulator with fixed output voltage options.

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

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Enumere 10 preguntas y respuestas comunes relacionadas con la aplicación de L4979D en soluciones técnicas

Sure! Here are 10 common questions and answers related to the application of L4979D in technical solutions:

  1. Q: What is L4979D? A: L4979D is a voltage regulator IC (integrated circuit) commonly used in technical solutions to regulate and control the output voltage.

  2. Q: What is the input voltage range for L4979D? A: The input voltage range for L4979D typically varies from 8V to 55V.

  3. Q: What is the maximum output current that L4979D can handle? A: L4979D can handle a maximum output current of up to 5A.

  4. Q: How does L4979D regulate the output voltage? A: L4979D uses a feedback mechanism to compare the output voltage with a reference voltage, adjusting the internal circuitry to maintain a stable output voltage.

  5. Q: Can L4979D be used in both step-up and step-down voltage regulation applications? A: Yes, L4979D can be used in both step-up (boost) and step-down (buck) voltage regulation applications.

  6. Q: Does L4979D have built-in protection features? A: Yes, L4979D has built-in protection features such as over-temperature protection, over-current protection, and short-circuit protection.

  7. Q: What is the typical efficiency of L4979D? A: The typical efficiency of L4979D is around 90%, making it an energy-efficient choice for voltage regulation.

  8. Q: Can L4979D operate in a wide temperature range? A: Yes, L4979D can operate in a wide temperature range, typically from -40°C to +125°C.

  9. Q: What are the typical applications of L4979D? A: L4979D is commonly used in various technical solutions such as power supplies, battery chargers, LED drivers, and motor control circuits.

  10. Q: Is L4979D a surface-mount device (SMD) or through-hole package? A: L4979D is available in both surface-mount (SMD) and through-hole packages, providing flexibility for different PCB assembly methods.

Please note that these answers are general and may vary depending on the specific datasheet and application requirements of L4979D.