资 源 简 介
The MAX16804 current regulator operates from a 5.5V to40V input voltage range and delivers 35mA to 350mA toone or more strings of high-brightness LEDs (HB LEDs).The output current of the MAX16804 is set by using anexternal current-sense resistor in series with the LEDs. Adual-mode DIM pin and on-board 200Hz ramp generatorallow PWM dimming with an analog or PWM input signal.The analog control signal at dimming input DIM allows fora theater-dimming effect to be implemented. Fast turn-onand turn-off TImes ensure a wide-range PWM operaTIon,while wave-shaping circuitry minimizes EMI. The differenTIalcurrent-sense input increases LED current accuracyand noise immunity. The MAX16804 is well suited forapplicaTIons requiring high-voltage input and is able towithstand automotive load-dump events up to 45V. Anon-board pass element minimizes external componentswhile providing 3% output-current accuracy. Additionalfeatures include a 5V regulated output and short-circuit and thermal protection.
