MAX16839ATT/V+T Maxim Integrated, MAX16839ATT/V+T Datasheet - Page 7

• 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

Specifications of MAX16839ATT/V+T

• Input Voltage: 5 V to 40 V
• Maximum Supply Current: 15 mA to 100 mA

The MAX16839 programmable current regulator oper-
ates from a 5V to 40V input voltage range and features
an open-drain, constant-current-sink output capable of
sinking up to 100mA. The MAX16839 directly withstands
automotive load-dump events of up to 45V.
A single resistor-programmable output current and on-
board pass element minimize the number of external
components 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 to be implemented. 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 brightness in LED strings.
Figure
1. Internal Block Diagram
High-Voltage, Linear High-Brightness LED
DIM
IN
_______________________________________________________________________________________
Detailed
30µA
1mA
THERMAL
SHDN
Driver with Open-LED Fault Detect
Description
GENERATOR
REFERENCE
5V REG
ENABLE
FAULT
5V
GND
1.65V
Additional features include thermal protection and an
open-LED detection output that can turn off multiple LED
strings simultaneously. See Figure 1.
The MAX16839 has an integrated open-LED detection
that reduces external components required to implement
this function. The following conditions enable the open-
LED detection feature:
U FLTS not connected to ground
U V
U Thermal shutdown inactive
U V
MAX16839
I
REG
IN
DIM
OPEN-LED
DETECT
> V
= High
INTH
(7.38V) (typ)
IN
15V CLAMP
Fault Event Status Memory
Open-LED Detection and
2.8mA
SINK
CS
FLTS
7