The LM3402MR/NOPB is a highly efficient, versatile and robust constant current buck regulator designed by Texas Instruments. It is specifically engineered to cater to the demanding requirements of high-power LED applications. With its wide input voltage range and adjustable output current capability, this device is an ideal choice for driving a single LED or multiple LEDs in series while ensuring uniform brightness and extended lifespan.

Key Features

• Input Voltage Range: The LM3402MR/NOPB operates over a broad input voltage range from 4.5V to 35V, making it suitable for a variety of power supply configurations.
• Adjustable Output Current: Users can set the output current from 0.5A to as high as 1.5A, providing flexibility to power LEDs with different current ratings.
• High Efficiency: The device boasts a high efficiency of up to 95%, minimizing power loss and heat generation, which is crucial for maintaining the reliability and longevity of LED lighting solutions.
• Integrated Switch: It includes a power MOSFET switch, which simplifies the design and reduces external component count.
• Thermal Protection: The LM3402MR/NOPB is equipped with thermal shutdown protection that safeguards the device and the LEDs from overheating.
• PWM Dimming Capability: It supports Pulse-Width Modulation (PWM) dimming, which allows for precise control over the brightness of the LEDs without affecting the color.
• Cycle-by-Cycle Current Limit: This feature ensures that the current through the LEDs does not exceed a safe level, thereby protecting the LEDs and the power supply from overcurrent conditions.

Applications

The LM3402MR/NOPB is suitable for a wide range of LED lighting applications including:

• Automotive lighting
• General illumination
• Architectural and decorative lighting
• Portable and emergency lighting
• Signage and backlighting

Quality and Reliability

As a product of Texas Instruments, the LM3402MR/NOPB is designed with the highest standards of quality and reliability. It is available in a thermally enhanced MSOP-PowerPAD package, which ensures efficient thermal management. The device is also lead-free and RoHS compliant, aligning with environmental standards and regulations.