MAX16807 查看數據表（PDF） - Maxim Integrated

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MAX16807

Integrated 8-Channel LED Driver with Switch-Mode Boost and SEPIC Controller

Maxim Integrated 

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MAX16807

Integrated 8-Channel LED Driver with

Switch-Mode Boost and SEPIC Controller

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 adjust-

able frequency (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

circuitry achieves ±3% current matching among strings

and enables paralleling of outputs for LED string

currents 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 dimming

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 pad package.

Typical Operating Circuits

VIN

3V TO 5.5V

CIN

CBYP

RSET

L

D

Q

COUT

CC2

RCS

CC1

RC1

OUT CS AGN

VCC

COMP

V+

PGND

LE

DIN

CLK

DOUT

OE

SET

FB

MAX16807

OUT0

OUT1

OUT2

OUT3

OUT4

OUT5

OUT6

OUT7

REF

RTCT

RT

CREF

CT

Features

●● Eight Constant-Current Output Channels (Up to

55mA Each)

●● ±3% Current Matching Among Outputs

●● Paralleling Channels Allows Higher Current per LED

String

●● Output 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

●● 4-Wire Serial Interface to Control Individual Output

Channels

Applications

●● LCD White or RGB LED Backlighting:

LCD TVs, Desktop and Notebook Panels,

Industrial and Medical Displays

●● Ambient, Mood, and Accent Lighting

Ordering Information

PART

TEMP RANGE PIN-PACKAGE

MAX16807AU I+ - 40°C to + 125°C 28 TSSOP-EP*

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

*EP = Exposed pad.

Pin Configuration appears at end of data sheet.

VOUT

R1

LEDs

R2

STAND-ALONE OPERATION

Typical Operating Circuits continued at end of data sheet.

19-0655; Rev 3; 11/14

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