LM3402MM/NOPB

Product Overview

• Category: Integrated Circuit
• Use: LED Driver
• Characteristics: High Efficiency, Constant Current Output
• Package: 8-Pin VSSOP
• Essence: Monolithic Buck Regulator
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Input Voltage Range: 6V to 42V
• Output Current: Up to 1A
• Switching Frequency: Adjustable up to 1MHz
• Efficiency: Up to 95%
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM3402MM/NOPB has the following pin configuration:

1. VIN: Input voltage
2. GND: Ground
3. FB: Feedback pin for setting the output current
4. EN: Enable pin for turning the device on/off
5. COMP: Compensation pin for stability control
6. SW: Switch node connection for the inductor
7. VCC: Supply voltage for internal circuitry
8. PGND: Power ground

Functional Features

• Wide input voltage range allows for versatile applications.
• Constant current output ensures consistent LED brightness.
• Adjustable switching frequency provides flexibility in design.
• Internal compensation simplifies external component requirements.
• Thermal shutdown and overcurrent protection enhance reliability.

Advantages

• High efficiency results in reduced power dissipation and longer LED lifespan.
• Compact package size enables space-saving designs.
• Wide operating temperature range allows for use in various environments.
• Easy integration into existing LED lighting systems.
• Cost-effective solution for driving LEDs.

Disadvantages

• Limited output current capability may not be suitable for high-power LED applications.
• Requires external components for proper operation.
• Not compatible with AC input voltage.

Working Principles

The LM3402MM/NOPB is a monolithic buck regulator designed specifically for driving LEDs. It operates by converting a higher input voltage to a lower output voltage while maintaining a constant current through the connected LED(s). This ensures consistent brightness and prevents damage due to overcurrent.

The device utilizes a pulse-width modulation (PWM) control scheme to regulate the output current. By adjusting the duty cycle of the switching transistor, the desired current level can be achieved. The switching frequency can also be adjusted to optimize efficiency and minimize electromagnetic interference.

Detailed Application Field Plans

The LM3402MM/NOPB is widely used in various LED lighting applications, including:

1. General lighting: Provides efficient and reliable LED driving for residential and commercial lighting fixtures.
2. Automotive lighting: Enables high-performance LED headlights, taillights, and interior lighting systems.
3. Display backlighting: Ensures uniform illumination for LCD panels in televisions, monitors, and signage.
4. Street lighting: Facilitates energy-efficient LED streetlight designs with long operational lifetimes.
5. Industrial lighting: Supports robust LED drivers for warehouses, factories, and outdoor industrial areas.

Detailed and Complete Alternative Models

• LM3402HVMM/NOPB: High-voltage version suitable for driving LEDs with higher forward voltages.
• LM3410XMF/NOPB: Synchronous buck regulator with integrated power MOSFETs for improved efficiency.
• LM3429Q1MF/NOPB: Automotive-grade LED driver with built-in fault protection features.
• LM3406HVMY/NOPB: Constant-current buck regulator with wide input voltage range and adjustable current limit.

(Note: This list is not exhaustive and other alternative models may exist.)

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