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L4947PD
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L4947PD

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Voltage Regulator
  • Characteristics:
    • High efficiency
    • Low dropout voltage
    • Adjustable output voltage
  • Package: PDIP (Plastic Dual In-line Package)
  • Essence: Linear voltage regulator
  • Packaging/Quantity: Tube packaging, 25 pieces per tube

Specifications

  • Input Voltage Range: 4.5V to 40V
  • Output Voltage Range: 1.2V to 37V
  • Output Current: Up to 1A
  • Dropout Voltage: 0.6V typical at 1A
  • Line Regulation: ±0.2% typical
  • Load Regulation: ±0.4% typical
  • Quiescent Current: 10mA typical
  • Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The L4947PD IC has the following pin configuration:

  1. GND (Ground)
  2. Vout (Output Voltage)
  3. Vin (Input Voltage)
  4. ADJ (Adjustment Pin)

Functional Features

  • High efficiency with low dropout voltage allows for efficient power conversion.
  • Adjustable output voltage provides flexibility in various applications.
  • Internal thermal shutdown and current limit protection ensure safe operation.

Advantages and Disadvantages

Advantages: - High efficiency results in less power dissipation. - Wide input voltage range allows for versatile use. - Adjustable output voltage suits different requirements.

Disadvantages: - Limited output current capacity of up to 1A. - Requires external components for stability and filtering.

Working Principles

The L4947PD is a linear voltage regulator that regulates the output voltage based on the difference between the input and desired output voltage. It uses a pass transistor to control the output voltage and maintain it at a constant level. The adjustable output voltage is set using an external resistor connected to the ADJ pin.

Detailed Application Field Plans

The L4947PD is commonly used in various applications, including:

  1. Power supplies for industrial equipment
  2. Automotive electronics
  3. Battery-powered devices
  4. Telecommunications equipment
  5. Consumer electronics

Detailed and Complete Alternative Models

  • LM317: Adjustable voltage regulator with similar specifications.
  • LT1083: High current linear voltage regulator.
  • LM7805: Fixed 5V voltage regulator.

These alternative models offer different features and specifications, providing options based on specific application requirements.

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací L4947PD v technických řešeních

Sure! Here are 10 common questions and answers related to the application of L4947PD in technical solutions:

  1. Q: What is L4947PD? A: L4947PD is a voltage regulator IC (integrated circuit) commonly used in technical solutions to regulate and stabilize voltage levels.

  2. Q: What is the input voltage range of L4947PD? A: The input voltage range of L4947PD is typically between 4.5V and 40V.

  3. Q: What is the output voltage range of L4947PD? A: The output voltage range of L4947PD can be adjusted from 1.235V to 35V.

  4. Q: What is the maximum output current of L4947PD? A: The maximum output current of L4947PD is around 1A, making it suitable for low to medium power applications.

  5. Q: Can L4947PD handle high temperatures? A: Yes, L4947PD is designed to operate reliably at high temperatures, typically up to 150°C.

  6. Q: Does L4947PD have built-in protection features? A: Yes, L4947PD includes various protection features such as thermal shutdown, overcurrent protection, and short-circuit protection.

  7. Q: Is L4947PD suitable for automotive applications? A: Yes, L4947PD is specifically designed for automotive applications and meets the required standards and specifications.

  8. Q: Can L4947PD be used in battery-powered devices? A: Yes, L4947PD can be used in battery-powered devices as it has a low quiescent current and supports low-power operation.

  9. Q: Does L4947PD require external components for operation? A: Yes, L4947PD requires a few external components such as input and output capacitors to ensure stability and filtering.

  10. Q: Are there any application notes or reference designs available for L4947PD? A: Yes, the manufacturer of L4947PD provides application notes and reference designs that can help in implementing the IC effectively in various technical solutions.

Please note that the specific details and specifications may vary depending on the manufacturer's datasheet and application requirements.