LM3555TLX/NOPB

Product Overview

Category: Integrated Circuits (ICs)

Use: The LM3555TLX/NOPB is a high-performance LED driver designed for portable lighting applications. It provides efficient power management and control for driving LEDs in various lighting systems.

Characteristics: - High efficiency - Wide input voltage range - Adjustable output current - Dimming control options - Over-temperature protection - Small form factor

Package: The LM3555TLX/NOPB is available in a compact 6-pin ThinSOT package, which allows for easy integration into space-constrained designs.

Essence: This LED driver offers a reliable and versatile solution for powering LEDs in portable lighting devices, ensuring optimal performance and energy efficiency.

Packaging/Quantity: The LM3555TLX/NOPB is typically sold in reels of 3000 units per reel.

Specifications

• Input Voltage Range: 2.7V to 5.5V
• Output Current Range: Up to 1A
• Efficiency: Up to 95%
• Dimming Control: PWM or DC voltage control
• Operating Temperature Range: -40°C to +85°C
• Package Type: ThinSOT-23-6

Pin Configuration

The LM3555TLX/NOPB features the following pin configuration:

1. VIN: Input voltage pin
2. GND: Ground pin
3. EN: Enable pin (active high)
4. DIM: Dimming control pin
5. FB: Feedback pin
6. VOUT: Output voltage pin

Functional Features

• High-efficiency step-up converter
• Adjustable output current through external resistor
• Dimming control through PWM or DC voltage
• Over-temperature protection for enhanced reliability
• Low quiescent current for improved power efficiency

Advantages and Disadvantages

Advantages: - High efficiency results in reduced power consumption - Wide input voltage range allows for compatibility with various power sources - Adjustable output current enables flexibility in LED brightness control - Dimming control options provide customization for different lighting scenarios - Over-temperature protection ensures safe operation and prolongs LED lifespan - Small form factor facilitates integration into compact designs

Disadvantages: - Limited output current range may not be suitable for high-power LED applications - Lack of built-in fault detection and reporting features

Working Principles

The LM3555TLX/NOPB operates as a step-up converter, converting the input voltage to a higher voltage required for driving LEDs. The output current can be adjusted by connecting an external resistor to the FB pin. Dimming control can be achieved through either PWM or DC voltage applied to the DIM pin.

The device incorporates over-temperature protection, which monitors the temperature and reduces the output current if it exceeds a certain threshold. This feature prevents damage to the LEDs and the driver itself.

Detailed Application Field Plans

The LM3555TLX/NOPB is well-suited for a wide range of portable lighting applications, including but not limited to: - Flashlights - Headlamps - Lanterns - Bike lights - Emergency lighting systems - Decorative lighting

Its small size, high efficiency, and adjustable output current make it ideal for battery-powered devices where space and power consumption are critical factors.

Detailed and Complete Alternative Models

1. LM3410: Step-up LED driver with similar specifications and package type.
2. LT3474: High-power step-up LED driver with extended output current range.
3. TPS61161: Integrated LED driver with built-in fault detection and reporting features.

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

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