MAX20078ATE+

The MAX20078ATE+ is a high-voltage, synchronous n-channel MOSFET controller designed for high-current buck LED drivers. It utilizes a proprietary average current-mode-control scheme for inductor current regulation without requiring control-loop compensation, maintaining a nearly constant switching frequency. The device operates over a wide 4.5V to 65V input range and supports switching frequencies up to 1MHz.

Key features include high- and low-side gate drivers with 2A peak current capability, adaptive non-overlap time to prevent shoot-through, and support for both analog and PWM dimming. It also includes a 5V VCC regulator capable of delivering 10mA to external circuitry and a current monitor that provides an analog voltage proportional to the inductor current. Protection features include inductor current-limit, overvoltage protection, and thermal shutdown.

This LED driver is suitable for applications such as automotive front and matrix lights, and head-up displays. It is available in a space-saving 16-pin TQFN package and is specified for automotive temperature ranges.

The MAX20078ATE+ is designed for ease of use, offering programmable switching frequency and a wide dimming ratio for high contrast ratios. It maintains current regulation even when shorting or opening individual LEDs in a string, and its ultrafast-response control loop prevents overshoots and undershoots.