Rainbow-electronics MAX16803 User Manual download pdf (Page 1)

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

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

MAX16803

High-Voltage, 350mA, High-Brightness LED

Driver with PWM Dimming and 5V Regulator

________________________________________________________________ Maxim Integrated Products 1

N.C.

OUT

CS+

GND

N.C.

12 11 9

OUT

N.C.

MAX16803

IN CS-

DIM

TQFN

TOP VIEW

Pin Configuration

Ordering Information

MAX16803

OUT

LEDs

SENSE

0.1µF

+6.5V TO +40V

+5V REG

CS+

0.1µF

CS-

DIM

PWM DIMMING

GND

Simplified Diagram

19-0532; Rev 0; 5/06

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.

+Denotes lead-free package.

*EP = Exposed pad.

PART

TEMP RANGE

PIN-

PACKAGE

PKG

CODE

MAX16803ATE+

-40°C to +125°C 16 TQFN-EP*

T1655-3

1 2 3 4 5 6 ... 11 12

MAX16803 1
PACKAGE OUTLINE 12

Summary of Contents

Page 1 - MAX16803

General DescriptionThe MAX16803 current regulator operates from a 6.5Vto 40V input-voltage range and delivers up to a total of350mA to one or more str

Page 2

MAX16803Multichannel HB LED DriverFigure 8 shows an array of MAX16803s with independentDIM control. The MAX5094C, a current-mode PWM con-troller, prov

Page 3

MAX16803High-Voltage, 350mA, High-Brightness LEDDriver with PWM Dimming and 5V Regulator______________________________________________________________

Page 4

MAX16803High-Voltage, 350mA, High-Brightness LEDDriver with PWM Dimming and 5V RegulatorMaxim cannot assume responsibility for use of any circuitry ot

Page 5

MAX16803High-Voltage, 350mA, High-Brightness LEDDriver with PWM Dimming and 5V Regulator2 ____________________________________________________________

Page 6

MAX16803High-Voltage, 350mA, High-Brightness LEDDriver with PWM Dimming and 5V Regulator______________________________________________________________

Page 7

MAX16803High-Voltage, 350mA, High-Brightness LEDDriver with PWM Dimming and 5V Regulator4 ____________________________________________________________

Page 8

MAX16803High-Voltage, 350mA, High-Brightness LEDDriver with PWM Dimming and 5V Regulator______________________________________________________________

Page 9

MAX16803High-Voltage, 350mA, High-Brightness LEDDriver with PWM Dimming and 5V Regulator6 ____________________________________________________________

Page 10

MAX16803High-Voltage, 350mA, High-Brightness LEDDriver with PWM Dimming and 5V Regulator______________________________________________________________

Page 11

MAX16803Two Brightness Levels forTAIL/STOP LightsFigure 4 shows PWM dimming operation for theMAX16803 with an ICM7555 timer. The ICM7555 pro-vides adj

Page 12 - PACKAGE OUTLINE

Other ApplicationsThe application circuit in Figure 6 implements a two-level brightness current for TAIL/STOP lights. In TAILoperation, Q1 is off and

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Rainbow-electronics MAX16803 User Manual Page 1

Browse online or download User Manual for Control panel Rainbow-electronics MAX16803. Rainbow Electronics MAX16803 User Manual

Summary of Contents

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Rainbow-electronics MAX16803 User Manual Page 1

Browse online or download User Manual for Control panel Rainbow-electronics MAX16803. Rainbow Electronics MAX16803 User Manual

Summary of Contents

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