General Description

The MAX16807 is an integrated, high-efficiency white or

RGB LED driver. It is designed for LCD backlighting

and other LED lighting applications with multiple strings

of LEDs. The MAX16807 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 features an 8V to 26.5V

input voltage range. A wide range of adjustable fre-

quency (20kHz to 1MHz) allows design optimization for

efficiency and minimum board space.

The MAX16807 LED driver includes eight open-drain,

constant-current-sinking LED driver outputs rated for

36V continuous operation. The LED current-control cir-

cuitry achieves ±3% current matching among strings

and enables paralleling of outputs for LED string cur-

rents higher than 55mA. The output-enable pin is used

for simultaneous PWM dimming of all output channels.

Dimming frequency range is 50Hz to 30kHz and dim-

ming ratio is up to 5000:1. The constant-current outputs

are single resistor programmable and the LED current

can be adjusted up to 55mA per output channel.

The MAX16807 operates either in stand-alone mode or

with a microcontroller (µC) using an industry-standard, 4-

wire serial interface.

The MAX16807 includes overtemperature protection,

operates over the full -40°C to +125°C temperature

range, and is available in a thermally enhanced, 28-pin

TSSOP exposed paddle package.

Features

o Eight Constant-Current Output Channels (Up to

55mA Each)

o ±3% Current Matching Among Outputs

o Paralleling Channels Allows Higher Current per

LED String

o Output Rated for 36V Continuous Voltage

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

o One Resistor Sets LED Current for All Channels

o Wide Dimming Ratio Up to 5000:1

o Low Current-Sense Reference (300mV) for High

Efficiency

o 8V to 26.5V Input Voltage or Higher with External

Biasing Devices

o 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

Integrated 8-Channel LED Driver with

Switch-Mode Boost and SEPIC Controller

________________________________________________________________

Maxim Integrated Products

1

19-0655; Rev 2; 8/09

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

EVALUATION

KIT

AVAILABLE

Pin Configuration appears at end of data sheet.

Ordering Information

PART

TEMP RANGEPIN-PACKAGE

MAX16807AUI+

-40°C to +125°C

28 TSSOP-EP*

MAX16807

OUT0

FB

OUT1

OUT2

OUT3

OUT4

OUT5

OUT6

OUT7

SET

LE

DIN

PGND

V+

OE

DOUT

CLK

REF

RTCT

OUT CS AGND

COMP

R2

R1

3V TO 5.5V

Q

L

D

LEDs

STAND-ALONE OPERATION

Typical Operating Circuits

+

Denotes a lead(Pb)-free/RoHS-compliant package.

*

EP = Exposed pad.

Typical Operating Circuits continued at end of data sheet.