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MAX16839ATT

更新时间： 2024-11-11 11:18:23
品牌 Logo 应用领域
美信 - MAXIM 驱动器高压
页数 文件大小 规格书
11页 1378K
描述
High-Voltage, Linear High-Brightness LED Driver with Open-LED Fault Detect

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19-4746; Rev 4; 4/11  
High-Voltage, Linear High-Brightness LED  
Driver with Open-LED Fault Detect  
General Description  
Features  
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.  
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  
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.  
S LED Open-Fault Detect Latches Off Multiple LED  
Strings  
S Multichip Synchronized LED Current Sink  
S
5ꢀ 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  
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.  
Ordering Information  
PART  
TEMP RANGE  
-40NC to +125NC  
-40NC to +125NC  
-40NC to +125NC  
PIN-PACKAGE  
6 TDFN-EP*  
8 SO-EP*  
MAX16839ATT+  
MAX16839ASA+  
MAX16839ATT/V+  
6 TDFN-EP*  
+Denotes a lead(Pb)-free/RoHS-compliant package.  
*EP = Exposed pad.  
/V denotes an automotive qualified part.  
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.  
Typical Application Circuit  
Applications  
Automotive Exterior: Turn Signal Light, Brake  
Light, Tail and Marker Lights  
V
BAT  
V
IN  
= 5V TO 40V  
Automotive Interior: Cluster and Warning Lights,  
Dome and Map Lights  
Truck, Train, Airplane, and Emergency Car LED  
Lighting  
REVERSE  
PROTECTION DIODE  
I
= 100mA  
LED  
General Lighting: Signage, LED Lamps  
C
IN  
= 0.01FF  
LEDs  
IN  
DIM  
SINK  
CS  
Pin Configurations appear at end of data sheet.  
MAX16839  
FLTS  
GND  
C
= 0.1FF  
R
CS  
= 2I  
FLTS  
_______________________________________________________________ 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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