LM3497MMX/NOPB

Product Overview

• Category: Integrated Circuit (IC)
• Use: LED Driver
• Characteristics: High Efficiency, Wide Input Voltage Range, Adjustable Output Current, Dimming Control
• Package: 10-Pin VSSOP
• Essence: LM3497MMX/NOPB is a high-efficiency LED driver IC designed to provide constant current to drive high-power LEDs. It offers various features for controlling the brightness of LEDs and is widely used in lighting applications.
• Packaging/Quantity: Available in reels of 2500 units.

Specifications

• Input Voltage Range: 4.5V to 60V
• Output Current Range: Up to 1.5A
• Switching Frequency: Adjustable up to 2MHz
• Dimming Control: Analog/PWM
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM3497MMX/NOPB IC has the following pin configuration:

1. VIN: Input voltage pin
2. GND: Ground pin
3. EN: Enable pin
4. DIM: Dimming control pin
5. FB: Feedback pin
6. SW: Switch node pin
7. LX: Inductor connection pin
8. VCC: Supply voltage pin
9. NC: No connection
10. NC: No connection

Functional Features

• High Efficiency: The LM3497MMX/NOPB utilizes a high-efficiency synchronous buck topology to minimize power losses and maximize energy conversion.
• Wide Input Voltage Range: With an input voltage range of 4.5V to 60V, the IC can be used in a wide range of applications.
• Adjustable Output Current: The output current can be adjusted using an external resistor, allowing flexibility in driving different types of LEDs.
• Dimming Control: The IC supports both analog and PWM dimming control methods, enabling precise brightness adjustment.
• Protection Features: The LM3497MMX/NOPB includes various protection features such as over-temperature protection, over-current protection, and under-voltage lockout.

Advantages and Disadvantages

Advantages: - High efficiency results in lower power consumption and reduced heat dissipation. - Wide input voltage range allows for versatile application possibilities. - Adjustable output current enables compatibility with various LED types. - Dimming control options provide flexibility in achieving desired lighting effects. - Integrated protection features enhance reliability and safety.

Disadvantages: - Limited maximum output current may not be suitable for driving high-power LEDs in certain applications. - Requires external components for operation, increasing overall system complexity.

Working Principles

The LM3497MMX/NOPB is a step-down (buck) LED driver. It regulates the LED current by adjusting the duty cycle of an internal switch. The input voltage is stepped down to the desired level using a power MOSFET and an inductor. The feedback pin monitors the LED current and adjusts the duty cycle accordingly to maintain a constant current.

Detailed Application Field Plans

The LM3497MMX/NOPB LED driver IC finds applications in various fields, including:

1. General Lighting: Used in residential, commercial, and industrial lighting fixtures to drive high-power LEDs for energy-efficient illumination.
2. Automotive Lighting: Enables efficient and controllable LED lighting in automotive applications such as headlights, taillights, and interior lighting.
3. Display Backlighting: Provides constant current to backlight LEDs in LCD displays, ensuring uniform brightness and longer lifespan.
4. Signage and Advertising: Powers LEDs in outdoor signs, billboards, and advertising displays, offering vibrant and eye-catching visuals.
5. Street Lighting: Facilitates energy-saving LED street lighting systems with adjustable brightness levels and dimming capabilities.

Detailed and Complete Alternative Models

1. LM3409HVMM/NOPB: High-voltage LED driver IC with similar features and performance characteristics.
2. LT3799EMSE#PBF: Step-down LED driver IC with integrated boost converter for driving high-power LEDs.
3. TPS92550EVM-001: Evaluation module featuring a buck LED driver IC suitable for various lighting applications.

These alternative models offer similar functionality and can be considered as alternatives to the LM3497MMX/NOPB based on specific application requirements.

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