LM2756TM/NOPB

Product Overview

Category: Integrated Circuits (ICs)

Use: The LM2756TM/NOPB is a high-efficiency, step-up DC-DC converter designed for driving up to 6 white LEDs in series. It is specifically designed for backlight applications in LCD displays.

Characteristics: - High efficiency - Wide input voltage range - Adjustable output current - Low shutdown current - Over-temperature protection - Under-voltage lockout

Package: The LM2756TM/NOPB is available in a small 16-pin thermally enhanced LLP package, which provides excellent thermal performance for improved reliability.

Essence: This IC is essential for providing efficient and reliable power supply to drive white LEDs in backlight applications, ensuring optimal brightness and uniform illumination in LCD displays.

Packaging/Quantity: The LM2756TM/NOPB is typically sold in reels of 2500 units.

Specifications

• Input Voltage Range: 2.7V to 5.5V
• Output Voltage Range: Up to 28V
• Maximum Output Current: 30mA per channel
• Switching Frequency: 1.2MHz
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The LM2756TM/NOPB features a 16-pin LLP package with the following pin configuration:

1. EN (Enable)
2. GND (Ground)
3. SW (Switch)
4. LX (Inductor Connection)
5. FB (Feedback)
6. VOUT (Output Voltage)
7. VDD (Supply Voltage)
8. VIN (Input Voltage)
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)

Functional Features

• High efficiency step-up DC-DC converter
• Drives up to 6 white LEDs in series
• Adjustable output current for brightness control
• Over-temperature protection ensures safe operation
• Under-voltage lockout prevents damage to the IC during low voltage conditions

Advantages and Disadvantages

Advantages: - High efficiency results in lower power consumption - Wide input voltage range allows for versatile applications - Adjustable output current enables brightness control - Compact package with excellent thermal performance - Over-temperature protection enhances reliability

Disadvantages: - Limited maximum output current may not be suitable for high-power LED applications - No integrated dimming control features

Working Principles

The LM2756TM/NOPB operates as a step-up DC-DC converter, converting a low input voltage to a higher output voltage required to drive multiple white LEDs in series. It utilizes a switching regulator topology to efficiently regulate the output voltage while maintaining high efficiency. The adjustable output current allows for brightness control of the LEDs.

Detailed Application Field Plans

The LM2756TM/NOPB is primarily used in backlight applications for LCD displays. It can be found in various electronic devices such as smartphones, tablets, laptops, televisions, and automotive infotainment systems. Its compact size, wide input voltage range, and high efficiency make it suitable for portable and battery-powered devices.

Detailed and Complete Alternative Models

1. LM2754TM/NOPB: Similar to LM2756TM/NOPB but with a lower maximum output current of 20mA per channel.
2. LM2757TM/NOPB: Step-up DC-DC converter with integrated dimming control features for LED backlight applications.
3. LM2758TM/NOPB: Step-up DC-DC converter with higher maximum output current of 50mA per channel for high-power LED applications.

These alternative models offer different specifications and features to cater to specific requirements in various applications.

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