LM3492MHX/NOPB

Product Overview

• Category: Integrated Circuit (IC)
• Use: LED Driver
• Characteristics:
  • High efficiency
  • Wide input voltage range
  • Adjustable output current
  • Dimming control options
• Package: PowerPAD HTSSOP-20
• Essence: This IC is designed to drive high-power LEDs efficiently and reliably.
• Packaging/Quantity: Available in tape and reel packaging, with 250 units per reel.

Specifications

• Input Voltage Range: 4.5V to 75V
• Output Current Range: Up to 1.5A
• Switching Frequency: Adjustable up to 2MHz
• Operating Temperature Range: -40°C to +125°C
• Protection Features:
  • Over-temperature protection
  • Over-voltage protection
  • Short-circuit protection

Pin Configuration

The LM3492MHX/NOPB IC has the following pin configuration:

1. VIN (Input Voltage)
2. GND (Ground)
3. VCC (Supply Voltage)
4. CS (Current Sense)
5. DIM (Dimming Control)
6. EN (Enable)
7. FB (Feedback)
8. AGND (Analog Ground)
9. SW (Switch Node)
10. LX (Inductor Connection)

Functional Features

• High Efficiency: The LM3492MHX/NOPB utilizes a high-performance buck converter topology, ensuring efficient power transfer to the LEDs.
• Wide Input Voltage Range: With an input voltage range of 4.5V to 75V, this IC can be used in various applications.
• Adjustable Output Current: The output current can be easily adjusted using external resistors, allowing flexibility in LED brightness control.
• Dimming Control Options: The DIM pin provides various dimming control options, including analog and PWM dimming.
• Protection Features: The IC incorporates over-temperature, over-voltage, and short-circuit protection mechanisms to ensure safe operation.

Advantages and Disadvantages

Advantages: - High efficiency leads to reduced power consumption. - Wide input voltage range enables versatile applications. - Adjustable output current allows precise LED brightness control. - Dimming control options provide flexibility in lighting design. - Protection features enhance reliability and safety.

Disadvantages: - Limited maximum output current may not be suitable for high-power LED applications. - Requires external components for proper operation.

Working Principles

The LM3492MHX/NOPB is a buck converter-based LED driver. It converts the input voltage to a lower regulated voltage required by the LEDs. The IC uses pulse-width modulation (PWM) to control the LED current, ensuring accurate and efficient power delivery. The feedback mechanism adjusts the duty cycle of the PWM signal based on the desired LED current, maintaining constant brightness.

Detailed Application Field Plans

The LM3492MHX/NOPB LED driver can be used in various lighting applications, including:

1. Indoor and outdoor LED lighting systems
2. Automotive lighting
3. Display backlighting
4. Street lighting
5. Architectural lighting

Detailed and Complete Alternative Models

1. LM3409HV/NOPB: Similar LED driver with higher maximum output current (up to 3A).
2. LM3410XMF/NOPB: Buck-boost LED driver with wide input voltage range and adjustable output current.
3. LM3429Q1MF/NOPB: Automotive-grade LED driver with integrated fault protection features.

These alternative models offer different specifications and features, allowing designers to choose the most suitable option for their specific application requirements.

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