MAX16804

19-0589; Rev 0; 7/06 www.DataSheet4U.com High-Voltage, 350mA LED Driver with Analog and PWM Dimming Control General Description The MAX16804 current regulator operates from a 5.5V to 40V input voltage range and delivers 35mA to 350mA to one or more strings of high-brightness LEDs (HB LEDs). The output current of the MAX16804 is set by using an external current-sense resistor in series with the LEDs. A dual-mode DIM pin and on-board 200Hz ramp generator allow PWM dimming with an analog or PWM input signal. The analog control signal at dimming input DIM allows for a theater-dimming effect to be implemented. Fast turn-on and turn-off times ensure a wide-range PWM operation, while wave-shaping circuitry minimizes EMI. The differential current-sense input increases LED current accuracy and noise immunity. The MAX16804 is well suited for applications requiring high-voltage input and is able to withstand automotive load-dump events up to 45V. An on-board pass element minimizes external components while providing 3% output-current accuracy. Additional features include a 5V regulated output and short-circuit and thermal protection. The MAX16804 is available in a thermally enhanced, 5mm x 5mm, 20-pin TQFN package and is specified over the automotive -40°C to +125°C temperature range. Features ♦ Flexible Dimming Control, Analog or PWM Control Signal for PWM and Theater Dimming ♦ 200Hz On-Board Ramp Generator ♦ Sinks to External PWM Signal (Up to 2kHz) ♦ 5.5V to 40V Operating Range ♦ ...