Texas Instruments
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LM2755TMX/NOPB
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LM2755TMX/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management IC for LED Backlighting

Characteristics: - High efficiency - Low quiescent current - Wide input voltage range - Adjustable output voltage - Overvoltage protection - Thermal shutdown protection

Package: 20-pin TSSOP package

Essence: The LM2755TMX/NOPB is a power management IC specifically designed for LED backlighting applications. It provides efficient power conversion and control for driving LED strings in various display devices.

Packaging/Quantity: The LM2755TMX/NOPB is available in a 20-pin TSSOP package. The quantity per reel is typically 2500 units.

Specifications

  • Input Voltage Range: 2.7V to 5.5V
  • Output Voltage Range: 4V to 24V
  • Maximum Output Current: 30mA
  • Quiescent Current: 50µA (typical)
  • Efficiency: Up to 90%
  • Operating Temperature Range: -40°C to +85°C

Pin Configuration

The LM2755TMX/NOPB has the following pin configuration:

  1. EN (Enable)
  2. VIN (Input Voltage)
  3. GND (Ground)
  4. VOUT (Output Voltage)
  5. FB (Feedback)
  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)
  17. NC (No Connection)
  18. NC (No Connection)
  19. NC (No Connection)
  20. NC (No Connection)

Functional Features

  • Adjustable output voltage through external resistors
  • Overvoltage protection to prevent damage to the LED strings
  • Thermal shutdown protection to prevent overheating
  • Low quiescent current for power efficiency
  • Wide input voltage range for compatibility with various power sources

Advantages and Disadvantages

Advantages: - High efficiency power conversion - Wide input voltage range allows for versatile applications - Adjustable output voltage for flexibility - Overvoltage and thermal shutdown protection for reliability

Disadvantages: - Limited maximum output current (30mA) - No integrated dimming control

Working Principles

The LM2755TMX/NOPB operates by converting the input voltage to a regulated output voltage suitable for driving LED strings. It uses a buck converter topology to efficiently step down the voltage while maintaining high power conversion efficiency. The output voltage can be adjusted using external resistors connected to the FB pin.

Detailed Application Field Plans

The LM2755TMX/NOPB is commonly used in various display devices that require LED backlighting, such as: - LCD monitors - TVs - Automotive displays - Portable electronic devices (e.g., smartphones, tablets)

Detailed and Complete Alternative Models

Some alternative models to the LM2755TMX/NOPB include: - LM2754TMX/NOPB - LM2756TMX/NOPB - LM2757TMX/NOPB - LM2758TMX/NOPB

These models offer similar functionality and characteristics, providing options for different design requirements.

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רשום 10 שאלות ותשובות נפוצות הקשורות ליישום של LM2755TMX/NOPB בפתרונות טכניים

  1. Question: What is the maximum input voltage for LM2755TMX/NOPB?
    Answer: The maximum input voltage for LM2755TMX/NOPB is 5.5V.

  2. Question: What is the typical output current capability of LM2755TMX/NOPB?
    Answer: The typical output current capability of LM2755TMX/NOPB is 500mA.

  3. Question: Can LM2755TMX/NOPB be used in battery-powered applications?
    Answer: Yes, LM2755TMX/NOPB can be used in battery-powered applications as it has low quiescent current.

  4. Question: What is the operating temperature range for LM2755TMX/NOPB?
    Answer: The operating temperature range for LM2755TMX/NOPB is -40°C to 85°C.

  5. Question: Does LM2755TMX/NOPB have over-temperature protection?
    Answer: Yes, LM2755TMX/NOPB includes over-temperature protection to ensure safe operation.

  6. Question: Can LM2755TMX/NOPB be used for LED backlighting in displays?
    Answer: Yes, LM2755TMX/NOPB is suitable for LED backlighting in displays due to its high efficiency and dimming control features.

  7. Question: What is the typical switching frequency of LM2755TMX/NOPB?
    Answer: The typical switching frequency of LM2755TMX/NOPB is 1.2MHz.

  8. Question: Is LM2755TMX/NOPB compatible with both step-up and step-down configurations?
    Answer: Yes, LM2755TMX/NOPB can be configured for both step-up and step-down operations, providing flexibility in design.

  9. Question: Can LM2755TMX/NOPB be used in automotive applications?
    Answer: Yes, LM2755TMX/NOPB is suitable for automotive applications, meeting the necessary requirements for reliability and performance.

  10. Question: What are the key advantages of using LM2755TMX/NOPB in technical solutions?
    Answer: The key advantages of LM2755TMX/NOPB include high efficiency, small footprint, and integrated features such as soft start and thermal shutdown for enhanced system reliability.