MAX16839 Datasheet, PDF (1/11 Pages) Maxim Integrated Products – High-Voltage, Linear High-Brightness LED Driver with Open-LED Fault Detect

19-4746; Rev 1; 5/10
EVAALVUAAILTAIOBNLEKIT
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 onboard pass element minimizes external component
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 pro-
tection 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.
Applications
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
Features
S 5V to 40V Operating Range
S Integrated 2I 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 -40NC to +125NC Operating Temperature Range
S Thermal Protection
S Undervoltage Lockout
S 6-Pin TDFN-EP and 8-Pin SO-EP Packages
Ordering Information
PART
MAX16839ATT+
MAX16839ASA+
TEMP RANGE
-40NC to +125NC
-40NC to +125NC
PIN-PACKAGE
6 TDFN-EP*
8 SO-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Typical Application Circuit
V_BAT
V_IN = 5V TO 40V
REVERSE
PROTECTION DIODE
C_IN = 0.01FF
I_LED = 100mA
LEDs
Pin Configurations appear at end of data sheet.
C_FLTS = 0.1FF
IN
DIM
SINK
MAX16839
FLTS
CS
GND
R_CS = 2I
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or visit Maxim’s website at www.maxim-ic.com.