MAX16839ATT/V+T Maxim Integrated, MAX16839ATT/V+T Datasheet

MAX16839ATT/V+T

Manufacturer Part Number

MAX16839ATT/V+T

Description

LED Lighting Drivers High-Voltage Linear High-Brightness LED Driver with LED Fault Open Detect

Manufacturer

Maxim Integrated

Datasheet

1.MAX16839ATTVT.pdf (11 pages)

Specifications of MAX16839ATT/V+T

Input Voltage

5 V to 40 V

Maximum Supply Current

15 mA to 100 mA

Current page: 1 of 11
Download datasheet (2Mb)

Pin Configurations appear at end of data sheet.

19-4746; Rev 4; 4/11

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 Q5% 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-

ing during subsequent power-up cycles.

The MAX16839 is available in thermally enhanced, 6–pin

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

over the -40NC to +125NC automotive temperature range.

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.

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

General Lighting: Signage, LED Lamps

High-Voltage, Linear High-Brightness LED

_______________________________________________________________ Maxim Integrated Products 1

General Description

Driver with Open-LED Fault Detect

Applications

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

*EP = Exposed pad.

/V denotes an automotive qualified part.

MAX16839ATT+

MAX16839ASA+

MAX16839ATT/V+

5V to 40V Operating Range

Integrated 2I Open-Drain Pass Transistor

15mA to 100mA Programmable LED Current

PWM Dimming

Open-LED Fault Detection

Open-LED Fault Event Status Memory

LED Open-Fault Detect Latches Off Multiple LED

Strings

Multichip Synchronized LED Current Sink

±5% LED Current Accuracy

-40NC to +125NC Operating Temperature Range

Thermal Protection

Undervoltage Lockout

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

PART

BAT

FLTS

= 0.1FF

PROTECTION DIODE

Typical Application Circuit

REVERSE

= 0.01FF

-40NC to +125NC

TEMP RANGE

Ordering Information

DIM

FLTS

MAX16839

= 5V TO 40V

GND

SINK

LED

PIN-PACKAGE

6 TDFN-EP*

8 SO-EP*

6 TDFN-EP*

= 100mA

Features

= 2I

LEDs

Related parts for MAX16839ATT/V+T

MAX16839ATT/V+T Summary of contents

Page 1

... Truck, Train, Airplane, and Emergency Car LED Lighting General Lighting: Signage, LED Lamps Pin Configurations appear at end of data sheet. _______________________________________________________________ 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 40V Operating Range ...

Page 2

High-Voltage, Linear High-Brightness LED Driver with Open-LED Fault Detect ABSOLUTE MAXIMUM RATINGS (Voltages are specified with respect to GND.) IN, SINK .................................................................-0.3V to +45V FLTS ......................................................................-0.3V to +18V DIM ..........................................................................-0.3V to +6V CS .........................................................................-0.3V to +0.5V Continuous Current into SINK ...

Page 3

High-Voltage, Linear High-Brightness LED Driver with Open-LED Fault Detect ELECTRICAL CHARACTERISTICS (continued 12V 0V 4.07I FLTS CS otherwise noted. Typical values are at T PARAMETER SYMBOL FAULT EVENT STATUS MEMORY FLTS Activation ...

Page 4

High-Voltage, Linear High-Brightness LED Driver with Open-LED Fault Detect ( V = 12V 4.07I from CS to GND Typical values are +25NC.) A OUTPUT CURRENT vs. TEMPERATURE 17 16mA LOAD ...

Page 5

High-Voltage, Linear High-Brightness LED Driver with Open-LED Fault Detect ( V = 12V 4.07I from CS to GND Typical values are +25NC.) A LED CURRENT RISE/FALL TIMES MAX16839 toc08 V DIM 2V/div ...

Page 6

High-Voltage, Linear High-Brightness LED Driver with Open-LED Fault Detect ( V = 12V 4.07I from CS to GND Typical values are +25NC.) A FAULT INTEGRATION ON OPEN LED (100Hz, 50% DUTY CYCLE ...

Page 7

High-Voltage, Linear High-Brightness LED Driver with Open-LED Fault Detect Detailed The MAX16839 programmable current regulator oper- ates from 40V input voltage range and features an open-drain, constant-current-sink output capable of sinking up to 100mA. The MAX16839 directly ...

Page 8

High-Voltage, Linear High-Brightness LED Driver with Open-LED Fault Detect The MAX16839 detects an open-LED event when V drops below 30mV for 25µs. When the fault condition is detected, a 2.8mA current source charges the capaci- tor between FLTS and ground, ...

Page 9

High-Voltage, Linear High-Brightness LED Driver with Open-LED Fault Detect Applications Information If a fault condition is detected, a 2.8mA current source charges C to memorize the fault condition and avoid FLTS flashing during the subsequent power-up cycles. The choice of ...

Page 10

High-Voltage, Linear High-Brightness LED Driver with Open-LED Fault Detect TOP VIEW + IN 1 DIM 2 MAX16839 FLTS 3 TDFN Chip Information PROCESS: BiCMOS DMOS 10 _____________________________________________________________________________________ 6 SINK GND EP For the latest package outline information ...

Page 11

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 2011 Maxim Integrated Products © ...

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