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LM27964SQ-I/NOPB

LM27964SQ-I/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management IC for LED Backlighting Applications

Characteristics: - High efficiency - Wide input voltage range - Adjustable output current - Dimming control - Overvoltage and overtemperature protection

Package: 20-pin WQFN package

Essence: LM27964SQ-I/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 LM27964SQ-I/NOPB is available in a 20-pin WQFN package. The quantity per reel is typically 2500 units.

Specifications

  • Input Voltage Range: 4.5V to 40V
  • Output Current Range: Up to 1.2A
  • Switching Frequency: 1MHz
  • Dimming Control: PWM or Analog
  • Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM27964SQ-I/NOPB has the following pin configuration:

  1. VIN: Input voltage
  2. EN: Enable pin
  3. FB: Feedback pin
  4. DIM: Dimming control input
  5. GND: Ground
  6. SW: Switch node connection
  7. LX: Inductor connection
  8. VOUT: Output voltage
  9. PGND: Power ground
  10. AGND: Analog ground
  11. NC: No connect
  12. NC: No connect
  13. NC: No connect
  14. NC: No connect
  15. NC: No connect
  16. NC: No connect
  17. NC: No connect
  18. NC: No connect
  19. NC: No connect
  20. NC: No connect

Functional Features

  • High efficiency power conversion
  • Wide input voltage range for versatile applications
  • Adjustable output current for precise LED brightness control
  • Dimming control options (PWM or analog) for flexible backlight adjustment
  • Overvoltage and overtemperature protection for enhanced reliability

Advantages and Disadvantages

Advantages: - High efficiency results in energy savings - Wide input voltage range allows compatibility with various power sources - Adjustable output current enables precise control of LED brightness - Dimming control options provide flexibility in backlight adjustment - Overvoltage and overtemperature protection enhance system reliability

Disadvantages: - Limited to LED backlighting applications - Requires additional external components for operation

Working Principles

The LM27964SQ-I/NOPB operates by converting the input voltage to a regulated output voltage suitable for driving LED strings. It utilizes a high-frequency switching regulator to efficiently control the LED current. The dimming control input allows for adjusting the LED brightness using either a PWM signal or an analog voltage.

Detailed Application Field Plans

The LM27964SQ-I/NOPB is commonly used in various display devices that require LED backlighting, such as: - LCD monitors - Televisions - Automotive infotainment systems - Industrial displays - Medical equipment displays

Detailed and Complete Alternative Models

  1. LM27963SQ-I/NOPB: Similar to LM27964SQ-I/NOPB but with a lower output current capability.
  2. LM27965SQ-I/NOPB: Similar to LM27964SQ-I/NOPB but with a higher output current capability.
  3. LM27966SQ-I/NOPB: Similar to LM27964SQ-I/NOPB but with additional features like fault detection and reporting.

These alternative models offer similar functionality and can be considered based on specific application requirements.

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技術ソリューションにおける LM27964SQ-I/NOPB 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。

  1. What is the input voltage range of LM27964SQ-I/NOPB?
    - The input voltage range of LM27964SQ-I/NOPB is 2.7V to 5.5V.

  2. What is the output current capability of LM27964SQ-I/NOPB?
    - LM27964SQ-I/NOPB has an output current capability of up to 500mA.

  3. Can LM27964SQ-I/NOPB be used in battery-powered applications?
    - Yes, LM27964SQ-I/NOPB is suitable for battery-powered applications due to its low quiescent current and wide input voltage range.

  4. What is the typical efficiency of LM27964SQ-I/NOPB?
    - The typical efficiency of LM27964SQ-I/NOPB is around 90% at full load.

  5. Does LM27964SQ-I/NOPB have built-in overcurrent protection?
    - Yes, LM27964SQ-I/NOPB features built-in overcurrent protection to safeguard the device and the load.

  6. Can LM27964SQ-I/NOPB operate in a wide temperature range?
    - Yes, LM27964SQ-I/NOPB is designed to operate in a wide temperature range, typically from -40°C to 125°C.

  7. Is LM27964SQ-I/NOPB suitable for automotive applications?
    - Yes, LM27964SQ-I/NOPB is AEC-Q100 qualified, making it suitable for automotive applications.

  8. What type of package does LM27964SQ-I/NOPB come in?
    - LM27964SQ-I/NOPB is available in a small 10-pin WSON package for space-constrained applications.

  9. Can LM27964SQ-I/NOPB be used in industrial control systems?
    - Yes, LM27964SQ-I/NOPB is well-suited for industrial control systems due to its robust design and wide input voltage range.

  10. Does LM27964SQ-I/NOPB require external compensation components?
    - No, LM27964SQ-I/NOPB features internal compensation, eliminating the need for external compensation components.