LM3556TMX/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: The LM3556TMX/NOPB is a high-performance LED driver designed for backlighting applications in LCD displays. It provides efficient and precise control of LED brightness, making it suitable for various portable electronic devices such as smartphones, tablets, and laptops.

Characteristics: - High efficiency - Precise current regulation - Wide input voltage range - Dimming control options - Thermal shutdown protection

Package: The LM3556TMX/NOPB is available in a small outline package (SOT) with 16 pins.

Essence: This IC is essential for controlling the brightness of LEDs used in LCD backlighting, ensuring optimal display quality and power efficiency.

Packaging/Quantity: The LM3556TMX/NOPB is typically sold in reels containing 2500 units per reel.

Specifications

• Input Voltage Range: 2.7V to 5.5V
• Output Current Range: Up to 1.5A
• Dimming Control: PWM or DC voltage
• Operating Temperature Range: -40°C to +85°C
• Efficiency: Up to 92%
• Shutdown Current: <1µA

Pin Configuration

The LM3556TMX/NOPB features the following pin configuration:

1. EN (Enable)
2. VIN (Input Voltage)
3. GND (Ground)
4. VOUT (Output Voltage)
5. FB (Feedback)
6. DIM (Dimming Control)
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)

Functional Features

• Efficient LED current regulation
• Wide input voltage range for compatibility with various power sources
• Dimming control options for flexible brightness adjustment
• Thermal shutdown protection to prevent overheating and damage

Advantages and Disadvantages

Advantages: - High efficiency leads to power savings - Precise current regulation ensures consistent brightness levels - Wide input voltage range allows for versatile applications - Dimming control options provide flexibility in adjusting backlight brightness - Thermal shutdown protection prevents damage due to overheating

Disadvantages: - Limited output current range may not be suitable for high-power LED applications - Requires external components for proper operation

Working Principles

The LM3556TMX/NOPB operates by regulating the current flowing through the LEDs used in LCD backlighting. It uses a feedback mechanism to maintain a constant current, ensuring consistent brightness levels. The dimming control feature allows the user to adjust the LED brightness either through pulse-width modulation (PWM) or by applying a DC voltage.

Application Field Plans

The LM3556TMX/NOPB is primarily used in LCD backlighting applications for portable electronic devices such as smartphones, tablets, and laptops. Its efficient and precise control of LED brightness makes it ideal for enhancing display quality while optimizing power consumption.

Alternative Models

1. LM3554TMX/NOPB
2. LM3555TMX/NOPB
3. LM3557TMX/NOPB
4. LM3558TMX/NOPB

These alternative models offer similar functionality and can be considered as replacements for the LM3556TMX/NOPB depending on specific requirements and availability.

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