TILM3406MH/NOPB
Overview
The LM3406MH/NOPB is a buck (step-down) DC/DC regulator specifically designed to drive high-power LEDs with constant current. It integrates a 2.0A internal N-channel MOSFET and utilizes true average output current control to maintain precise LED brightness. The device supports a wide input voltage range from 6V to 42V, making it suitable for various industrial and automotive lighting applications.
Why Choose This Part
The IC features a high-speed PWM dimming input and can operate with switching frequencies up to 1MHz to allow for small external inductors. It is highly versatile, supporting all-ceramic output capacitors or even capacitor-less configurations to reduce PCB footprint and BOM cost. Safety is ensured through cycle-by-cycle current limiting and integrated thermal shutdown protection.
Applications
Key Specifications
Getting Started
For rapid prototyping, utilize the LM3406 evaluation boards to verify the simple control loop compensation and thermal performance. Ensure the PowerTSSOP-14 package is properly soldered to a large ground plane to leverage its thermal pad for heat dissipation. Designers should select the switching frequency between 10kHz and 1MHz based on the desired efficiency and inductor size requirements.
