LM3402HVMRX/NOPB

Product Overview

Category: Integrated Circuits (ICs)

Use: The LM3402HVMRX/NOPB is a high-voltage, buck regulator IC designed for driving high-power LEDs. It provides efficient and precise current control for LED lighting applications.

Characteristics: - High voltage input range - Wide output current range - Adjustable switching frequency - Thermal shutdown protection - Low dropout voltage

Package: The LM3402HVMRX/NOPB is available in a small outline package (SOP) with 8 pins.

Essence: This IC is specifically designed to regulate the current flowing through high-power LEDs, ensuring optimal performance and longevity of the LEDs.

Packaging/Quantity: The LM3402HVMRX/NOPB is typically sold in reels containing 2500 units.

Specifications

• Input Voltage Range: 6V to 75V
• Output Current Range: Up to 1A
• Switching Frequency Range: 100kHz to 1MHz
• Dropout Voltage: 0.5V (typical)
• Operating Temperature Range: -40°C to 125°C

Pin Configuration

The LM3402HVMRX/NOPB has the following pin configuration:

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| | --| VIN GND|-- Pin 1: Ground --| EN SW |-- Pin 2: Switch Control --| FB NC |-- Pin 3: No Connection --| VREF NC |-- Pin 4: No Connection --| IADJ VOUT|-- Pin 5: Output Voltage --| CS COMP|-- Pin 6: Compensation --| VCC NC |-- Pin 7: No Connection --| NC NC |-- Pin 8: No Connection |___________| ```

Functional Features

• High Voltage Input Range: The LM3402HVMRX/NOPB can handle input voltages ranging from 6V to 75V, making it suitable for a wide range of applications.
• Wide Output Current Range: It supports output currents up to 1A, allowing flexibility in driving different types of high-power LEDs.
• Adjustable Switching Frequency: The switching frequency can be adjusted within a wide range (100kHz to 1MHz) to optimize efficiency and minimize electromagnetic interference.
• Thermal Shutdown Protection: The IC incorporates thermal shutdown protection, which prevents damage due to excessive temperature.
• Low Dropout Voltage: With a low dropout voltage of only 0.5V, the LM3402HVMRX/NOPB minimizes power dissipation and improves overall efficiency.

Advantages and Disadvantages

Advantages: - Wide input voltage range allows compatibility with various power sources. - Precise current control ensures optimal performance and longevity of LEDs. - Adjustable switching frequency enables optimization for different applications. - Thermal shutdown protection prevents damage from overheating. - Low dropout voltage enhances overall efficiency.

Disadvantages: - Limited output current range may not be suitable for extremely high-power LED applications. - Requires external compensation components for stability.

Working Principles

The LM3402HVMRX/NOPB operates as a buck regulator, converting a higher input voltage to a lower output voltage while regulating the current flowing through the LEDs. It utilizes a pulse-width modulation (PWM) technique to control the duty cycle of the switching transistor, thereby adjusting the average current delivered to the LEDs.

The IC continuously monitors the feedback voltage (FB) to regulate the output current according to the desired setpoint. By adjusting the switching frequency and duty cycle, the LM3402HVMRX/NOPB maintains a constant current through the LEDs, ensuring consistent brightness and preventing damage due to overcurrent.

Detailed Application Field Plans

The LM3402HVMRX/NOPB is widely used in various LED lighting applications, including:

1. Street Lighting: The high-voltage input range and precise current control make it suitable for driving high-power LEDs used in street lighting systems.
2. Industrial Lighting: It can be employed in industrial lighting fixtures that require efficient and reliable LED drivers.
3. Automotive Lighting: The IC's wide input voltage range and thermal shutdown protection make it ideal for automotive LED lighting applications.
4. Signage and Display Lighting: The LM3402HVMRX/NOPB can drive high-power LEDs used in signage and display lighting, providing uniform illumination and energy efficiency.

Detailed and Complete Alternative Models

1. LM3402HV: Similar to LM3402HVMRX/NOPB but without the SOP package option.
2. LM3402LV: Low-voltage version of the LM3402 series, designed for lower input voltage applications.
3. LT3479: