MAX16823

The MAX16823 three-channel LED driver operates from a 5.5V to 40V input voltage range and delivers up to 100mA per channel to one or more strings of high-brightness LEDs (HBLEDs). Each channel's current is programmable using an external current-sense resistor in series with the LEDs. Three DIM inputs allow a wide range of independent pulsed dimming in addition to providing the on and off control of the outputs. Wave-shaping circuitry reduces EMI while providing fast turn-on and turn-off times.

Features of the MAX16823 are:(1)5.5V to 40V operating range; (2)adjustable constant output current(5mA to 100mA and up to 2A with external BJT); (3)open LED detection; (4)three independent high-voltage DIM inputs; (5)three integrated pass elements with low dropout voltage (0.7V max); (6)undervoltage lockout; (7)output short-circuit protection; (8)3.4V voltage regulator with 4mA capability; (9)accurate, Low 203mV current sense; (10)overtemperature shutdown.The MAX16823 is well suited for automotive applications requiring a high-voltage input and is able to withstand load-dump events up to 45V. On-board pass elements minimize external components while providing ±5% LED current accuracy.

The absolute maximum ratings of the MAX16823 can be summarized as:(1)IN to GND:-0.3V to +45V;(2)storage temperature range:-65 to +150;(3)operating temperature range:-40 to +125;(4)junction temperature:+150;(5)continuous power dissipation:2666mW.Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied.Exposure to absolute maximum rating conditions for extended periods may affect device reliability.The MAX16823 three-channel current regulator operates from a 5.5V to 40V input voltage range and delivers up to 100mA per channel to one or more strings of HBLEDs.The output currents are programmable using external current-sense resistors in series with the LEDs.Three DIM inputs allow a wide range of independent pulsed dimming in addition to providing the on and off control of the outputs. The MAX16823 offers an LEDGOOD output that indicates an open-circuit condition when one or more LED channels are open.