MAX16806

www.DataSheet4U.com 19-0625; Rev 0; 8/06 EEPROM-Programmable, High-Voltage, 350mA LED Drivers with LED Current Foldback General Description The MAX16805/MAX16806 LED drivers eliminate the need for microcontrollers or switch-mode converters for automotive interior dome, map, and courtesy light applications. An EEPROM-programmable LED currentsense reference simplifies production by using one sense resistor to set the LED current for all LED bins. A dual-mode DIM pin and an on-board 200Hz ramp generator allow for PWM dimming with an analog or PWM control signal. The analog control signal at dimming input DIM allows for the “theater dimming” effect to be implemented. Fast turn-on/-off times ensure a widerange PWM operation, while waveshaping circuitry minimizes EMI. EEPROM-programmable LED current foldback makes it possible to operate at a high input voltage, while saving the cost and space associated with having a large heatsink. The MAX16806 works with an external thermal sensor to maintain maximum LED junction temperature by folding back the LED current. The thermal foldback temperature knee and slope are EEPROM programmable. The MAX16806 SW pin supplies necessary wetting current to a momentary switch. Features o EEPROM or I2C* Dynamically Programmable: LED Current Foldback for High Input Voltage LED Current Reference LED Current Thermal Foldback (MAX16806) o On-Board 200Hz Ramp Generator Eliminates the Need for µC PWM Signal o Flexible Analog or PWM Control for PWM or Thea...