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
