LM3421Q0MH/NOPB

Product Overview

• Category: Integrated Circuit (IC)
• Use: LED Driver
• Characteristics: High Efficiency, Wide Input Voltage Range, Dimming Control
• 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 2500 units per reel.

Specifications

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

Pin Configuration

The LM3421Q0MH/NOPB IC has the following pin configuration:

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| | | UDG | |___________|

Pin 1: VIN Pin 2: GND Pin 3: SW Pin 4: FB Pin 5: EN Pin 6: DIM Pin 7: VCC Pin 8: AGND Pin 9: PGND Pin 10: COMP Pin 11: SS Pin 12: RT Pin 13: CT Pin 14: BST Pin 15: CS Pin 16: IADJ Pin 17: VREF Pin 18: VSENSE Pin 19: VOUT Pin 20: ADJ ```

Functional Features

• High efficiency conversion of input voltage to output current for driving LEDs.
• Wide input voltage range allows for versatile applications.
• Dimming control options enable brightness adjustment.
• Integrated protection features like over-voltage, over-current, and thermal shutdown.

Advantages

• High efficiency results in reduced power consumption and heat dissipation.
• Wide input voltage range makes it suitable for various power supply configurations.
• Dimming control provides flexibility in adjusting LED brightness.
• Integrated protection features ensure safe operation and reliability.

Disadvantages

• Limited output current range may not be suitable for high-power LED applications.
• Requires external components for proper operation and performance optimization.

Working Principles

The LM3421Q0MH/NOPB is a buck LED driver IC that utilizes a switching regulator to efficiently drive high-power LEDs. It operates by converting the input voltage to a regulated output current suitable for driving LEDs. The IC incorporates a feedback mechanism to maintain constant current flow through the LEDs, ensuring consistent brightness.

Detailed Application Field Plans

The LM3421Q0MH/NOPB LED driver IC finds applications in various fields, including:

1. General lighting: Provides efficient and reliable LED driving for residential and commercial lighting applications.
2. Automotive lighting: Enables high-power LED illumination in automotive headlights, taillights, and interior lighting.
3. Display backlighting: Suitable for driving LEDs used in LCD panel backlighting for TVs, monitors, and signage.
4. Street lighting: Offers energy-efficient LED driving solutions for streetlights, reducing power consumption and maintenance costs.

Detailed and Complete Alternative Models

1. LM3409HV: High-voltage buck LED driver with similar specifications and features.
2. LT3957: Multi-channel LED driver with integrated boost converter for driving multiple LEDs.
3. TPS92560: Constant current buck LED driver with integrated diagnostics and fault protection.

These alternative models provide similar functionality and can be considered as alternatives to the LM3421Q0MH/NOPB for specific application requirements.

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