LM3404HVMR/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: The LM3404HVMR/NOPB is a high-voltage buck regulator designed for driving high-power LEDs. It provides efficient and precise control of LED current in various lighting applications.

Characteristics: - High voltage input range - Adjustable output current - Wide dimming range - Internal compensation - Thermal shutdown protection - Small form factor

Package: The LM3404HVMR/NOPB is available in a compact 8-pin SOIC package, which ensures ease of integration into LED driver circuits.

Essence: This IC serves as a crucial component in LED lighting systems, enabling efficient power conversion and accurate current regulation for optimal LED performance.

Packaging/Quantity: The LM3404HVMR/NOPB is typically sold in reels containing 2500 units per reel.

Specifications

• Input Voltage Range: 6V to 75V
• Output Current Range: Up to 1A
• Switching Frequency: Up to 1MHz
• Dimming Control: Analog/PWM
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM3404HVMR/NOPB features the following pin configuration:

___________ | | NC |1 8| VCC EN |2 7| GND FB |3 6| DIM VIN|4 5| SW |___________|

1. NC: No Connection
2. EN: Enable Pin (Active High)
3. FB: Feedback Pin (Connects to an external resistor for current regulation)
4. VIN: Input Voltage Pin
5. SW: Switch Node Pin
6. DIM: Dimming Control Pin (Analog or PWM input)
7. GND: Ground Pin
8. VCC: Supply Voltage Pin

Functional Features

• High voltage capability allows direct operation from a wide range of power sources.
• Adjustable output current enables precise control of LED brightness.
• Wide dimming range facilitates flexible lighting control.
• Internal compensation simplifies circuit design and improves stability.
• Thermal shutdown protection prevents damage due to excessive temperature.

Advantages and Disadvantages

Advantages: - Wide input voltage range accommodates various power sources. - Efficient power conversion minimizes energy loss. - Compact package size enables space-saving designs. - Precise current regulation ensures optimal LED performance. - Flexible dimming options provide versatile lighting control.

Disadvantages: - Limited maximum output current may not be suitable for high-power LED applications. - Requires external components for proper operation. - Higher cost compared to non-integrated LED driver solutions.

Working Principles

The LM3404HVMR/NOPB operates as a buck regulator, converting the higher input voltage to a lower regulated output voltage required for driving LEDs. It utilizes a switching transistor to control the current flow through the LEDs, achieving efficient power conversion. The feedback pin (FB) is used to sense the LED current and regulate it by adjusting the duty cycle of the switching transistor. The dimming control pin (DIM) allows for analog or pulse-width modulation (PWM) dimming of the LEDs.

Detailed Application Field Plans

The LM3404HVMR/NOPB finds extensive application in various lighting systems, including: 1. Automotive lighting 2. Street lighting 3. Architectural lighting 4. Industrial lighting 5. Signage lighting 6. Display backlighting

Its ability to handle high input voltages and provide precise current regulation makes it suitable for demanding lighting applications that require efficiency, reliability, and flexibility.

Detailed and Complete Alternative Models

1. LM3404: Similar to LM3404HVMR/NOPB but with a lower input voltage range.
2. LM3406: Buck regulator specifically designed for driving high-power LEDs with a higher maximum output current.
3. LM3410: Step-up (boost) regulator for driving LEDs from a low-voltage power source.
4. LM3429: Synchronous buck LED driver with integrated MOSFETs for high-efficiency applications.

These alternative models offer different features and specifications, allowing designers to choose the most suitable solution based on their specific requirements.

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