LM3402MMX

Product Overview

Category: Integrated Circuits (ICs)

Use: The LM3402MMX 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 dropout voltage

Package: The LM3402MMX is available in a small outline package (SOP) with 8 pins.

Essence: This LED driver is specifically designed to provide a constant current to LEDs, ensuring optimal performance and longevity.

Packaging/Quantity: The LM3402MMX 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
• Dropout Voltage: 0.5V (typical)
• Dimming Control: PWM (Pulse Width Modulation)

Pin Configuration

The LM3402MMX has the following pin configuration:

```

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| | --| VCC GND|-- --| VIN CTRL|-- --| ISET DIM |-- --| NC NC |-- |___________| ```

• VCC: Power supply voltage input
• GND: Ground reference
• VIN: Input voltage
• CTRL: Control pin for adjusting the output current
• ISET: Pin for setting the desired output current
• DIM: Dimming control input pin
• NC: Not connected

Functional Features

• Constant current output for driving LEDs
• Wide input voltage range allows for versatile applications
• Adjustable output current to accommodate different LED configurations
• Thermal shutdown protection prevents overheating
• Low dropout voltage minimizes power loss

Advantages and Disadvantages

Advantages: - High efficiency results in energy savings - Wide input voltage range provides flexibility in design - Adjustable output current allows for customization - Thermal shutdown protection ensures reliability - Low dropout voltage reduces power dissipation

Disadvantages: - Limited maximum output current of 1A may not be suitable for high-power LED applications - Requires external dimming control circuitry for brightness adjustment

Working Principles

The LM3402MMX operates by regulating the current flowing through the connected LEDs. It uses a feedback mechanism to adjust the output current based on the voltage drop across a sense resistor connected in series with the LEDs. This ensures that the LEDs receive a constant and stable current, resulting in consistent brightness and extended lifespan.

Detailed Application Field Plans

The LM3402MMX is widely used in various lighting applications, including: - General illumination - Automotive lighting - Signage and display lighting - Architectural lighting - Industrial lighting

Alternative Models

For those seeking alternative options, the following LED driver ICs can be considered: - LM3404: Similar features and specifications as LM3402MMX, but with higher maximum output current capability (up to 3A). - LT3474: Buck-boost LED driver with integrated Schottky diode, suitable for applications requiring both step-up and step-down voltage conversion.

These alternative models offer different capabilities and may better suit specific project requirements.

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