General Description

The MAX16823 three-channel LED driver operates from a

5.5V to 40V input voltage range and delivers up to 100mA

per channel to one or more strings of high-brightness

LEDs (HBLEDs). Each channel’s current is programmable

using an external current-sense resistor in series with the

LEDs. Three DIM inputs allow a wide range of indepen-

dent pulsed dimming in addition to providing the on and

off control of the outputs. Wave-shaping circuitry reduces

EMI while providing fast turn-on and turn-off times.

The MAX16823 is well suited for automotive applications

requiring a high-voltage input and is able to withstand

load-dump events up to 45V. On-board pass elements

minimize external components while providing

±5% LED

current accuracy. Additional features include an active-

high, open-drain LEDGOOD output for open LED detec-

tion, a +3.4V (±5%) regulated output with 4mA output

current capability, short-circuit and thermal protections.

The MAX16823 is available in thermally enhanced 5mm x

5mm, 16-pin TQFN-EP and 16–pin TSSOP-EP packages

and is specified over the -40°C to +125°C automotive

temperature range.

Applications

Automotive Exterior: Rear Combination Lights

(RCLs), CHMSL

Automotive Interior: RGB Ambient Lighting,

Cluster Lighting, and LCD Backlighting

Emergency Vehicle Warning Lights

Navigation and Marine Indicators

Architectural and Industrial Lighting

Features

o 5.5V to 40V Operating Range

o Adjustable Constant Output Current

(5mA to 100mA and Up to 2A with External BJT)

o ±5% Output Current Accuracy

o Open LED Detection

o Three Independent High-Voltage DIM Inputs

o Three Integrated Pass Elements with Low

Dropout Voltage (0.7V max)

o Undervoltage Lockout

o Output Short-Circuit Protection

o 3.4V Voltage Regulator with 4mA Capability

o Accurate, Low 203mV Current Sense

o Overtemperature Shutdown

o -40°C to +125°C Operating Temperature Range

High-Voltage, 3-Channel Linear High-Brightness

LED Driver with Open LED Detection

________________________________________________________________

Maxim Integrated Products

1

CS1

CS2

CS3

OUT3

CS1

CS2

CS3

GND

LEDGOOD

DIM2

DIM1

IN

IN

IN

REG

LGC

DIM3

REG

OUT2

OUT1

MAX16823

Ordering Information

Typical Operating Circuit

19-0733; Rev 3; 9/09

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.

Pin Configurations appear at end of data sheet.

EVALUATION

KIT

AVAILABLE

PART

TEMP RANGE

PIN-PACKAGE

MAX16823ATE+

-40°C to +125°C

16 TQFN-EP*

MAX16823ATE/V+

-40°C to +125°C

16 TQFN-EP*

MAX16823AUE+

-40°C to +125°C

16 TSSOP-EP*

MAX16823AUE/V+

-40°C to +125°C

16 TSSOP-EP*

+

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

*

EP = Exposed pad.

/V Denotes an automotive qualified part.