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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.

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

? 35mA to 350mA Adjustable LED Current

? 3 LED Current Accuracy

? High-Voltage (Up to 40V) DIM Pin

? Integrated Pass Element with Low-Dropout Voltage (0.5V typ)

? Additional +5V On-Board Regulator with 2mA Capability

? Differential LED Current Sense

? Low 200mV Current-Sense Reference Reduces Power Losses

? Wave-Shaped Edges Minimize EMI During PWM Dimming

? Output Short-Circuit and Thermal-Shutdown Protection

? Available in Small, Thermally Enhanced, 5mm x 5mm, 20-Pin TQFN Package

? -40°C to +125°C Operating Temperature Range

Applications

? Automotive Interior: Map, Dome, and Courtesy Lighting

? Automotive Exterior:

???? Rear Combination Light (RCL)

???? Daytime Running Light (DRL)

???? Adaptive Front Light

? Warning Lights for Emergency Vehicles

? Navigation and Marine Indicators

? Signage, Canopies, and Beacons

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