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General Description

The MAX16823 three-channel LED driver operates from a

5.5V to 40V input voltage range and delivers up to 70mA

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

 5.5V to 40V Operating Range

 Adjustable Constant Output Current

(5mA to 70mA and Up to 2A with External BJT)

 ±5% Output Current Accuracy

 Open LED Detection

 Three Independent High-Voltage DIM Inputs

 Three Integrated Pass Elements with Low

Dropout Voltage (0.7V max)

 Undervoltage Lockout

 Output Short-Circuit Protection

 3.4V Voltage Regulator with 4mA Capability

 Accurate, Low 203mV Current Sense

 Overtemperature Shutdown

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

MAX16823

High-Voltage, 3-Channel Linear High-Brightness

LED Driver with Open LED Detection

________________________________________________________________

Maxim Integrated Products

CS1 CS2 CS3

OUT3

CS1

CS2

CS3

GND

LEDGOOD

DIM2

DIM1

LEDGOOD

LGC

REG

LGC

DIM3

REG

OUT2

OUT1

MAX16823

Ordering Information

Typical Operating Circuit

19-0733; Rev 0; 1/07

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

Pin Configurations appear at end of data sheet.

PART TEMP RANGE

PIN-

PACKAGE

PKG

CODE

MAX16823ATE+*

-40°C to +125°C 16 TQFN-EP** T1655-3

MAX16823AUE+ -40°C to +125°C 16 TSSOP-EP** U16E-3

Denotes a lead-free package.

Future product—contact factory for availability.

EP = Exposed pad.

1 2 3 4 5 6 ... 12 13

MAX16823 1

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General DescriptionThe MAX16823 three-channel LED driver operates from a5.5V to 40V input voltage range and delivers up to 70mAper channel to one or m

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MAX16823High-Voltage, 3-Channel Linear High-BrightnessLED Driver with Open LED DetectionMaxim cannot assume responsibility for use of any circuitry ot

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Rainbow-electronics MAX16823 Manual do Utilizador

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