LM3423Q0MH/NOPB

Product Overview

• Category: Integrated Circuit (IC)
• Use: LED Driver
• Characteristics: High efficiency, dimmable, constant current
• Package: QFN (Quad Flat No-Lead)
• Essence: Power management IC for driving high-power LEDs
• Packaging/Quantity: Tape and Reel, 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

Detailed Pin Configuration

The LM3423Q0MH/NOPB IC has the following pin configuration:

1. VIN: Input voltage
2. GND: Ground
3. VCC: Supply voltage for internal circuitry
4. DIM: Dimming control input
5. FB: Feedback pin for regulating output current
6. SW: Switch node for connecting the inductor
7. EN: Enable pin for turning on/off the IC
8. PGND: Power ground

Functional Features

• High efficiency conversion of input voltage to constant current for driving LEDs
• Wide input voltage range allows for versatile applications
• Dimming control options enable brightness adjustment
• Internal thermal shutdown protection prevents overheating
• Compact QFN package ensures space-saving design

Advantages and Disadvantages

Advantages

• High efficiency results in reduced power consumption
• Dimming capability provides flexibility in lighting applications
• Wide input voltage range accommodates various power sources
• Compact package size enables integration into small form factor designs

Disadvantages

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

Working Principles

The LM3423Q0MH/NOPB is a constant current LED driver IC that utilizes a buck converter topology. It regulates the output current to drive high-power LEDs efficiently. The input voltage is converted to a constant current source, ensuring consistent brightness and preventing LED damage due to voltage fluctuations. The dimming control allows for adjusting the LED brightness by varying the duty cycle of the PWM signal or the analog control voltage.

Detailed Application Field Plans

The LM3423Q0MH/NOPB LED driver IC finds applications in various fields, including:

1. General lighting: Provides efficient and dimmable LED driving for residential and commercial lighting applications.
2. Automotive lighting: Enables precise control of LED brightness in automotive headlights, taillights, and interior lighting.
3. Display backlighting: Offers constant current drive for LED backlights in LCD panels, ensuring uniform illumination.
4. Outdoor lighting: Suitable for driving high-power LEDs in streetlights, floodlights, and landscape lighting.
5. Industrial lighting: Supports reliable LED driving in factories, warehouses, and other industrial environments.

Detailed and Complete Alternative Models

1. LM3409HV: High-voltage LED driver with similar features and performance.
2. LT3799: LED driver IC with integrated boost converter for driving high-power LEDs.
3. TPS92550: Constant current buck LED driver with integrated diagnostics and protection features.
4. MAX16834: High-efficiency LED driver with integrated MOSFET for driving multiple LEDs in series.

(Note: This list is not exhaustive and there are several other alternative models available in the market.)

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