LM3492HCQMH/NOPB

Product Overview

• Category: Integrated Circuit (IC)
• Use: LED Driver
• Characteristics: High Efficiency, Constant Current Output
• Package: QFN (Quad Flat No-Lead)
• Essence: This IC is designed to drive high-power LEDs efficiently and reliably.
• Packaging/Quantity: Available in tape and reel packaging, with 2500 units per reel.

Specifications

• Input Voltage Range: 4.5V to 75V
• Output Current Range: Up to 1.5A
• Switching Frequency: Adjustable up to 2MHz
• Dimming Control: Analog/PWM
• Thermal Shutdown Protection: Yes
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM3492HCQMH/NOPB IC has the following pin configuration:

1. VIN: Input voltage
2. GND: Ground
3. FB: Feedback pin for current regulation
4. EN: Enable pin for turning on/off the IC
5. DIM: Dimming control input
6. SW: Switch node connection for driving LEDs
7. VCC: Supply voltage for internal circuitry

Functional Features

• High efficiency conversion of input voltage to constant current output for driving LEDs.
• Wide input voltage range allows for versatile applications.
• Adjustable switching frequency enables optimization for different LED configurations.
• Dimming control options provide flexibility in brightness adjustment.
• Thermal shutdown protection ensures safe operation under high temperature conditions.

Advantages and Disadvantages

Advantages: - High efficiency results in reduced power consumption and longer LED lifespan. - Wide input voltage range allows for compatibility with various power sources. - Dimming control options enable customization of lighting levels. - Thermal shutdown protection enhances reliability and safety.

Disadvantages: - Limited output current range may not be suitable for high-power LED applications. - Requires external components for proper operation, increasing complexity and cost.

Working Principles

The LM3492HCQMH/NOPB is a buck LED driver IC that utilizes a constant current control scheme. It regulates the LED current by adjusting the duty cycle of the internal switching regulator. The input voltage is converted to a constant current output, ensuring consistent brightness across the LEDs.

The IC incorporates various protection features such as thermal shutdown, overvoltage protection, and overcurrent protection to safeguard the LEDs and the IC itself from potential damage.

Detailed Application Field Plans

The LM3492HCQMH/NOPB LED driver IC finds applications in various fields, including:

1. General lighting: Suitable for indoor and outdoor lighting applications, such as residential, commercial, and street lighting.
2. Automotive lighting: Can be used in automotive headlights, taillights, and interior lighting systems.
3. Display backlighting: Ideal for driving LEDs in LCD displays, providing uniform and adjustable illumination.
4. Signage and advertising: Enables efficient and reliable illumination of LED-based signs and billboards.

Detailed and Complete Alternative Models

1. LM3409HV: Similar LED driver IC with higher output current capability.
2. LM3410: Buck-boost LED driver IC for applications requiring wide input voltage range.
3. LM34927: Synchronous buck LED driver IC with integrated MOSFETs for improved efficiency.

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

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