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L4971D
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L4971D

Product Overview

Category

The L4971D belongs to the category of voltage regulators.

Use

It is used as a step-down monolithic power switching regulator.

Characteristics

  • High efficiency
  • Low standby current
  • Wide input voltage range
  • Overvoltage protection
  • Thermal shutdown

Package

The L4971D comes in a TO-220 package.

Essence

This voltage regulator is essential for providing stable and regulated power supply in various electronic applications.

Packaging/Quantity

The L4971D is typically available in reels with quantities varying based on supplier specifications.

Specifications

  • Input Voltage Range: 8V to 55V
  • Output Voltage Range: 2.85V to 50V
  • Output Current: Up to 1.5A
  • Switching Frequency: 100 kHz to 300 kHz
  • Operating Temperature Range: -40°C to 150°C

Detailed Pin Configuration

The L4971D has a standard pin configuration with pins for input voltage, ground, output voltage, feedback, and enable/disable control.

Functional Features

  • Internal current limiting
  • Soft-start function
  • Synchronization capability
  • Error amplifier for voltage regulation

Advantages

  • High efficiency leads to reduced power dissipation
  • Wide input voltage range allows for versatile applications
  • Overvoltage protection enhances system reliability

Disadvantages

  • Limited output current compared to some other regulators
  • Higher cost compared to non-switching linear regulators

Working Principles

The L4971D operates by using a pulse-width modulation (PWM) control scheme to regulate the output voltage. It switches the power transistor on and off to maintain the desired output voltage.

Detailed Application Field Plans

The L4971D is commonly used in: - Industrial power supplies - Automotive electronics - Battery charging systems - LED lighting applications

Detailed and Complete Alternative Models

Some alternative models to the L4971D include: - LM2576 - LM2596 - LM2675

In conclusion, the L4971D voltage regulator offers high efficiency and a wide input voltage range, making it suitable for various applications in different industries. However, its limited output current and relatively higher cost compared to linear regulators are important considerations when selecting a voltage regulator for a specific application.

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10 domande e risposte comuni relative all'applicazione di L4971D nelle soluzioni tecniche

  1. What is the L4971D?

    • The L4971D is a step-down switching regulator designed for use in various technical solutions to efficiently convert high voltage inputs to lower regulated voltages.

  2. What is the input voltage range of the L4971D?

    • The L4971D can handle input voltages ranging from 8V to 55V, making it suitable for a wide range of applications.

  3. What is the output current capability of the L4971D?

    • The L4971D can deliver up to 1.5A of continuous output current, making it suitable for powering a variety of loads in technical solutions.

  4. What are the key features of the L4971D?

    • The L4971D features include a wide input voltage range, high efficiency, adjustable output voltage, and overcurrent protection, making it versatile for different technical solutions.

  5. How does the adjustable output voltage feature work in the L4971D?

    • The L4971D allows for the adjustment of the output voltage through an external resistor divider network, providing flexibility in meeting specific application requirements.

  6. What are the typical applications of the L4971D?

    • Typical applications of the L4971D include industrial automation, consumer electronics, telecommunications equipment, and automotive systems, among others.

  7. What is the efficiency of the L4971D?

    • The L4971D offers high efficiency, typically above 85%, contributing to energy savings and reduced heat dissipation in technical solutions.

  8. How does the overcurrent protection feature function in the L4971D?

    • The L4971D incorporates overcurrent protection that limits the output current to a safe level, protecting the regulator and the load during fault conditions.

  9. What are the thermal considerations for using the L4971D in technical solutions?

    • Proper thermal management, such as using adequate heatsinking or thermal vias, is important to ensure the L4971D operates within its specified temperature range for reliable performance.

  10. Are there any application notes or reference designs available for the L4971D?

    • Yes, STMicroelectronics provides comprehensive application notes and reference designs to assist engineers in implementing the L4971D in various technical solutions effectively.