STMicroelectronics
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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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Noem 10 veelgestelde vragen en antwoorden met betrekking tot de toepassing van L4938ED in technische oplossingen

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!