MAX16803EVKIT+【PDF 1/11 页】EVAL KIT FOR MAX16803

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ATION

EVALU

AVAILA

19-0532; Rev 1; 4/09

KIT

BLE

High-Voltage, 350mA, High-Brightness LED

Driver with PWM Dimming and 5V Regulator

General Description

Features

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)

+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 (12 μ A 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

Emergency Vehicle Warning Lights

Navigation and Marine Indicators

PART

MAX16803ATE+

TEMP RANGE

-40°C to +125°C

PIN-PACKAGE

16 TQFN-EP*

General Lighting

Signage, Gasoline Canopies, Beacons

Pin Configuration

TOP VIEW

MAX16803ATE/V+ -40°C to +125°C 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

OUT

0.1 μ F

DIM 13

N.C.

+5V REG

LEDs

N.C. 14

EN 15

MAX16803

N.C.

MAX16803

CS+

0.1 μ F

OUT 16

N.C.

PWM DIMMING

R SENSE

DIM

GND

CS-

TQFN

________________________________________________________________ Maxim Integrated Products

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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