General Description

The MAX16809/MAX16810 are integrated, high-efficiency white or RGB LED drivers. They are designed for LCD backlighting and other LED lighting applications with multiple strings of LEDs. The MAX16809/MAX16810’s current-mode PWM controller regulates the necessary voltage to the LED array. Depending on the input voltage and LED voltage range, it can be used with boost or buck-boost (SEPIC) topologies.

Features

♦ 16 Constant-Current Output Channels (Up to 55mA Each)

♦ ±3 Current Matching Among Outputs

♦ Paralleling Channels Allows Higher Current per LED String

♦ Outputs Rated for 36V Continuous Voltage

♦ Output-Enable Pin for PWM Dimming (Up to 30kHz)

♦ One Resistor Sets LED Current for All Channels

♦ Wide Dimming Ratio Up to 5000:1

♦ Low Current-Sense Reference (300mV) for High Efficiency

♦ 8V to 26.5V Input Voltage or Higher with External Biasing Devices

♦ Open LED Detection and Watchdog Timer (MAX16810)

♦ 4-Wire Serial Interface to Control Individual Output Channels

Applications

    LCD White or RGB LED Backlighting:

        LCD TVs, Desktop, and Notebook Panels

        Automotive Navigation, Heads-Up,

        and Infotainment Displays

        Industrial and Medical Displays

    Ambient, Mood, and Accent Lighting