Integrated, 4-Channel, High-Brightness LED Driver With High-Voltage DC-DC Controller

The MAX16814 high-efficiency, high-brightness LED (HB LED) driver provides up to four integrated LED current- sink channels. An integrated current-mode switching DC-DC Controller drives a DC-DC Converter that pro- vides the necessary voltage to multiple strings of HB LEDs The MAX16814 accepts a wide 4.75V to 40V input voltage range and withstands direct automotive load- dump events. The wide input range allows powering HB LEDs for small to medium-sized LCD Displays in automo- tive and general lighting applications. An internal current-mode switching DC-DC Controller supports the boost, coupled-inductor boost-buck, or SEPIC topologies and operates in an adjustable fre- quency range between 200kHz and 2MHz. It CAN also be used for single-inductor boost-buck topology in conjunc- tion with the MAX15054 and an additional MOSFET The current-mode control with programmable slope com- pensation provides fast response and simplifies loop compensation. The MAX16814 also features an adaptive output-voltage control scheme that minimizes the power dissipation in the LED current-sink paths. By Maxim Integrated Products