LM3402MM

Product Overview

Category: Integrated Circuits (ICs)

Use: The LM3402MM is a high-performance, constant current LED driver designed for driving single or multiple LEDs in various lighting applications. It provides a regulated current output that is ideal for powering LEDs with a forward voltage drop of up to 40V.

Characteristics: - High efficiency - Wide input voltage range - Adjustable output current - Thermal shutdown protection - Low external component count

Package: The LM3402MM is available in a small outline package (SOP) with eight pins. This package offers excellent thermal performance and is suitable for surface mount applications.

Essence: The essence of the LM3402MM lies in its ability to provide a constant current output to drive LEDs efficiently and reliably.

Packaging/Quantity: The LM3402MM is typically sold in reels containing 2500 units per reel.

Specifications

• Input Voltage Range: 6V to 42V
• Output Current Range: 10mA to 1A
• Operating Temperature Range: -40°C to +125°C
• Maximum Power Dissipation: 1.5W

Pin Configuration

The LM3402MM has the following pin configuration:

___________ | | IN |1 8| VCC GND|2 7| ADJ OUT|3 6| NC | | |___________|

Functional Features

• Constant current output ensures consistent brightness of LEDs.
• Wide input voltage range allows for versatile application in different power supply systems.
• Adjustable output current enables flexibility in driving LEDs with varying forward voltage drops.
• Thermal shutdown protection prevents damage due to excessive temperature.
• Low external component count simplifies circuit design and reduces cost.

Advantages and Disadvantages

Advantages: - High efficiency results in energy savings. - Wide input voltage range allows for compatibility with various power sources. - Adjustable output current provides flexibility in LED selection. - Thermal shutdown protection ensures device reliability. - Low external component count simplifies circuit design.

Disadvantages: - Limited maximum output current may not be suitable for high-power LED applications. - Lack of built-in dimming control may require additional circuitry for brightness adjustment.

Working Principles

The LM3402MM operates by regulating the current flowing through the LEDs connected to its output. It uses a feedback mechanism to adjust the output current based on the voltage drop across a sense resistor. By maintaining a constant current, the LM3402MM ensures consistent brightness of the LEDs, regardless of variations in their forward voltage drops.

Detailed Application Field Plans

The LM3402MM is widely used in various lighting applications, including: 1. General illumination 2. Automotive lighting 3. Signage and display lighting 4. Architectural lighting 5. Backlighting for LCD panels 6. Street lighting

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the LM3402MM include: - LM3404MM: Similar specifications and pin configuration, but with a higher maximum output current of 2A. - LM3410MM: Step-up LED driver with adjustable output current and integrated switch. - LT3474EMSE: High-efficiency LED driver with integrated boost converter.

These alternative models can be considered based on specific application requirements and desired performance characteristics.

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