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MAX16803

High-Voltage, 350mA, High-Brightness LED Driver with PWM Dimming and 5V Regulator

Maxim Integrated 

19-0532; Rev 1; 4/09

EVAALVUAAILTAIOBNLEKIT

High-Voltage, 350mA, High-Brightness LED

Driver with PWM Dimming and 5V Regulator

General Description

The MAX16803 current regulator operates from a 6.5V

to 40V input-voltage range and delivers up to a total of

350mA to one or more strings of high-brightness LEDs

(HB LEDs). The output current of the MAX16803 is

adjusted by using an external current-sense resistor in

series with the LEDs. A dimming input allows wide-

range “pulsed” PWM operation. Wave-shaping circuitry

reduces EMI. The differential current-sense input

increases noise immunity. The MAX16803 is well suited

for applications requiring high-voltage input and is able

to withstand automotive load-dump events up to 40V.

An on-board pass element minimizes external compo-

nents while providing ±3.5% output-current accuracy.

Additional features include a 5V regulated output and

short-circuit and thermal protection.

The MAX16803 is available in a thermally enhanced,

5mm x 5mm, 16-pin TQFN package and is specified

over the automotive -40°C to +125°C temperature range.

Applications

Automotive Interior: Map, Courtesy, and Cluster

Lighting

Automotive Exterior: Rear Combination Lights (RCLs)

Emergency Vehicle Warning Lights

Navigation and Marine Indicators

General Lighting

Signage, Gasoline Canopies, Beacons

TOP VIEW

Pin Configuration

12 11 10 9

DIM 13

N.C. 14

EN 15

MAX16803

OUT 16

+

8 N.C.

7 N.C.

6 N.C.

5 N.C.

1

2

3

4

Features

♦ +6.5V to +40V Operating Range

♦ Adjustable LED Current (35mA to 350mA)

♦ ±3.5% LED Current Accuracy

♦ High-Voltage DIM Pin for Dimming Interface

♦ Integrated Pass Element with Low-Dropout

Voltage (0.5V typ)

♦ +5V Regulated Output with 4mA Source

Capability

♦ Parallel Operation for LED Current > 350mA

♦ Differential LED Current Sense

♦ Low Shutdown Supply Current (12µA typ)

♦ Low 204mV Current-Sense Reference Reduces

Power Losses

♦ Wave-Shaped Edges Reduce Radiated EMI During

PWM Dimming

♦ Thermal Shutdown

♦ Output Short-Circuit Protection

♦ Available in Small, Thermally Enhanced,

5mm x 5mm, 16-Pin TQFN Package

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

Ordering Information

PART

TEMP RANGE

PIN-PACKAGE

MAX16803ATE+

MAX16803ATE/V+

-40°C to +125°C

-40°C to +125°C

16 TQFN-EP*

16 TQFN-EP*

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

*EP = Exposed pad.

/V denotes an automotive qualified part.

Simplified Diagram

+6.5V TO +40V

IN

0.1µF

EN

OUT

MAX16803

+5V REG

V5

0.1µF

CS+

PWM DIMMING

DIM

CS-

GND

LEDs

RSENSE

TQFN

________________________________________________________________ Maxim Integrated Products 1

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.

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