MAX16839EVKIT+【PDF 1/11 页】KIT EVAL FOR MAX16839

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EVALUA

AVAILAB

19-4746; Rev 4; 4/11

TION KIT

High-Voltage, Linear High-Brightness LED

Driver with Open-LED Fault Detect

General Description

The MAX16839 programmable current regulator operates

from a 5V to 40V input voltage range and features an

open-drain, constant-current-sink output capable of sink-

ing up to 100mA. The MAX16839 is well suited for auto-

motive applications and other applications that require a

general-purpose linear LED driver. The device directly

withstands automotive load-dump events of up to 45V.

An on-board pass element minimizes external compo-

nent count while providing Q 5% output current accuracy.

The MAX16839 includes a dimming input that controls

the duty cycle of the output current, allowing a wide LED

dimming range. In addition, the dimming input functions

as an on/off control of the output current. In multiple LED-

string applications, the dimming input synchronizes the

LED current-sink turn-on, ensuring simultaneous bright-

ness in LED strings.

Additional features include thermal and open-LED

protection and an open-LED fault-detection output. In

multiple LED string applications where all FLTS pins are

connected together, an open-LED detection in one LED

string turns off all the strings simultaneously. Open-LED

protection also features fault memory, to avoid LED flash-

Features

S 5V to 40V Operating Range

S Integrated 2 I Open-Drain Pass Transistor

S 15mA to 100mA Programmable LED Current

S PWM Dimming

S Open-LED Fault Detection

S Open-LED Fault Event Status Memory

S LED Open-Fault Detect Latches Off Multiple LED

Strings

S Multichip Synchronized LED Current Sink

S ±5% LED Current Accuracy

S -40 N C to +125 N C Operating Temperature Range

S Thermal Protection

S Undervoltage Lockout

S 6-Pin TDFN-EP and 8-Pin SO-EP Packages

Ordering Information

PART TEMP RANGE PIN-PACKAGE

MAX16839ATT+ -40 N C to +125 N C 6 TDFN-EP*

MAX16839ASA+ -40 N C to +125 N C 8 SO-EP*

ing during subsequent power-up cycles.

MAX16839ATT/V+

-40 N C to +125 N C

6 TDFN-EP*

The MAX16839 is available in thermally enhanced, 6–pin

TDFN-EP and 8-pin SO-EP packages and is specified

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

Applications

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

* EP = Exposed pad.

/V denotes an automotive qualified part.

Typical Application Circuit

Automotive Exterior: Turn Signal Light, Brake

Light, Tail and Marker Lights

Automotive Interior: Cluster and Warning Lights,

Dome and Map Lights

Truck, Train, Airplane, and Emergency Car LED

Lighting

V BAT

REVERSE

PROTECTION DIODE

V IN = 5V TO 40V

General Lighting: Signage, LED Lamps

C IN = 0.01 F F

I LED = 100mA

LEDs

Pin Configurations appear at end of data sheet.

DIM

FLTS

MAX16839

SINK

C FLTS = 0.1 F F

GND

R CS = 2 I

_______________________________________________________________ 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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