MAX16807 Datasheet | Maxim Integrated

Description The MAX16807/MAX16808 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 MAX16807/ MAX16808’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. The MAX16807/MAX16808 feature an 8V to 26.5V input voltage range. A wide range of adjustable frequency (20k Hz to 1MHz) allows design optimization for efficiency and minimum board space. The MAX16807/MAX16808 LED drivers include eight open-drain, constant-current-sinking LED driver outputs rated for 36V continuous operation. The LED currentcontrol circuitry achieves ±3% current matching among strings and enables paralleling of outputs for LED string currents higher than 55m A. The output-enable pin is used for simultaneous PWM dimming of all output channels. Dimming frequency range is 50Hz to 30k Hz and dimming ratio is up to 5000:1. The constant-current outputs are single resistor programmable and the LED current can be adjusted up to 55m A per output channel. The MAX16807/MAX16808 operate either in stand-alone mode or with a microcontroller (µC) using an industrystandard, 4-wire serial interface. The MAX16808 includes circuitry that automatically detects open-circuit LEDs. The MAX16807/MAX16808 include overtemperature protection, operate over the full -40°C to +125°C temperature range, and are available in a thermally enhanced, 28-pin TSSOP exposed paddle package. Pin Configurations appear at end of data sheet. Features - Eight Constant-Current Output Channels (Up to 55m A 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 30k Hz) - One Resistor Sets LED Current for All Channels - Wide Dimming Ratio Up to 5000:1 - Low...