MAX16833 High-Voltage, High-Brightness LED Drivers

Analog Devices’ MAX16833 family are peak current-mode controlled LED drivers for boost, buck-boost, SEPIC, flyback, and high-side buck topologies. A dimming driver designed to drive an external p-channel in series with the LED string provides wide-range dimming control. This feature provides extremely fast PWM current switching to the LEDs with no transient overvoltage or undervoltage conditions. In addition to PWM dimming, the ICs provide analog dimming using a DC input at ICTRL. The ICs sense the LED current at the high side of the LED string.

The MAX16833 operate over a wide 5 V to 65 V supply range and include a 3 A sink / source gate driver for driving a power MOSFET in high-power LED driver applications. Additional features include a fault-indicator output (active-low FLT) for short or overtemperature conditions and an overvoltage protection sense input (OVP) for overvoltage protection. High-side current sensing combined with a p-channel dimming MOSFET allow the positive terminal of the LED string to be shorted to the positive input terminal or to the negative input terminal without any damage.