MAX16839

The MAX16839 programmable current regulator operates from a 5V to 40V input voltage range and features an open-drain, constant-current sink output capable of sinking up to 100mA. The MAX16839 is well suited for automotive applications and other applications that require a general-purpose linear LED driver. The device directly withstands automotive load dump events of up to 45V.

Features of the MAX16839 are:1)5V to 40V operating range; (2)integrated 2 Open-drain pass transistor; (3)15mA to 100mA programmable LED current; (4)PWM dimming; (5)open-LED fault detection; (6)open-LED fault event status memory; (7)LED open-fault detect latches off multiple LED strings; (8)multichip synchronized LED current sink; (9)thermal protection; (10)undervoltage lockout; (11)6-pin TDFN-EP and 8-pin SO-EP packages.An onboard pass element minimizes external component count while providing Q5% output current accuracy. The MAX16839 includes a dimming input that controls the duty cycle of the output current, allowing a wide LED dimming range. In addition, the dimming input functions as an on/off control of the output current. In multiple LED string applications, the dimming input synchronizes the LED current-sink turn-on, ensuring simultaneous brightness in LED strings.

The absolute maximum ratings of the MAX16839 can be summarized as:(1)IN, SINK:-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:1904.8mW.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.A single resistor-programmable output current and onboard pass element minimize the number of external components while providing Q5% output current accuracy.The MAX16839 includes a dimming input that controls the duty cycle of the output current, allowing a wide LED dimming range to be implemented. In addition, the dimming input functions as an on/off control of the output current. In multiple LED-string applications, the dimming input synchronizes the LED current-sink turn-on, ensuring simultaneous brightness in LED strings.