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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