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L4938ED
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L4938ED

Product Overview

Category

The L4938ED belongs to the category of voltage regulators.

Use

It is used to regulate voltage in electronic circuits and power supply applications.

Characteristics

  • Input Voltage Range: 4.4V to 40V
  • Output Current: Up to 2A
  • Low Dropout Voltage: 0.5V at 1A
  • Thermal Shutdown
  • Overcurrent Protection

Package

The L4938ED comes in a TO-220 package.

Essence

This voltage regulator is essential for maintaining stable voltage levels in various electronic devices and systems.

Packaging/Quantity

The L4938ED is typically available in reels or tubes with varying quantities, depending on the supplier.

Specifications

  • Output Voltage: Adjustable from 1.25V to 37V
  • Dropout Voltage: 0.5V at 1A
  • Quiescent Current: 3.5mA
  • Operating Temperature Range: -40°C to 125°C
  • Line Regulation: 0.2%
  • Load Regulation: 0.4%

Detailed Pin Configuration

The L4938ED has the following pin configuration: 1. VIN (Input Voltage) 2. VOUT (Output Voltage) 3. GND (Ground) 4. ADJ (Adjustment)

Functional Features

  • Wide Input Voltage Range
  • High Output Current Capability
  • Low Dropout Voltage
  • Overcurrent Protection
  • Thermal Shutdown

Advantages and Disadvantages

Advantages

  • Wide input voltage range allows for versatile applications
  • High output current capability supports power-hungry devices
  • Low dropout voltage minimizes power loss
  • Built-in overcurrent protection enhances system safety
  • Thermal shutdown feature prevents overheating

Disadvantages

  • May require additional heat sinking for high-power applications
  • Higher quiescent current compared to some modern regulators

Working Principles

The L4938ED operates by comparing the output voltage to a reference voltage and adjusting the pass transistor to maintain a stable output voltage. It utilizes feedback control to regulate the output voltage within specified limits.

Detailed Application Field Plans

The L4938ED is suitable for a wide range of applications, including: - Power supplies for industrial equipment - Automotive electronics - Battery charging circuits - LED lighting systems - Consumer electronics

Detailed and Complete Alternative Models

Some alternative models to the L4938ED include: - LM317 - LM2940 - LT1086 - LM1117

In summary, the L4938ED is a versatile voltage regulator with a wide input voltage range, high output current capability, and essential protection features. Its application spans across various industries and electronic systems, making it a valuable component in voltage regulation solutions.

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技術ソリューションにおける L4938ED 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 L4938ED in technical solutions:

  1. What is L4938ED?

    • L4938ED is a voltage regulator IC designed for use in automotive applications.

  2. What is the input voltage range of L4938ED?

    • The input voltage range of L4938ED is typically from 5V to 40V.

  3. What is the output voltage range of L4938ED?

    • The output voltage range of L4938ED is adjustable from 5V to 28V.

  4. What is the maximum output current of L4938ED?

    • The maximum output current of L4938ED is typically 1.5A.

  5. What are the key features of L4938ED?

    • Some key features of L4938ED include overvoltage protection, thermal shutdown, and short-circuit protection.

  6. Can L4938ED be used in automotive lighting applications?

    • Yes, L4938ED can be used in automotive lighting applications due to its wide input voltage range and robust protection features.

  7. How does L4938ED handle thermal management?

    • L4938ED has built-in thermal shutdown protection to prevent overheating and ensure safe operation.

  8. Is L4938ED suitable for battery charging applications?

    • Yes, L4938ED can be used in battery charging applications, especially in automotive environments.

  9. What are the typical applications of L4938ED?

    • Typical applications of L4938ED include power supplies for automotive systems, LED lighting, and battery charging circuits.

  10. Does L4938ED require external components for operation?

    • Yes, L4938ED requires external capacitors and resistors for proper operation and stability.

I hope these questions and answers provide a good overview of the application of L4938ED in technical solutions. Let me know if you need further information on any specific aspect!