19-0733; Rev 3; 9/09
KIT
ATION
EVALU
BLE
AVAILA
High-Voltage, 3-Channel Linear High-Brightness
LED Driver with Open LED Detection
General Description
The MAX16823 three-channel LED driver operates from a
5.5V to 40V input voltage range and delivers up to 100mA
per channel to one or more strings of high-brightness
LEDs (HBLEDs). Each channel’s current is programmable
using an external current-sense resistor in series with the
LEDs. Three DIM inputs allow a wide range of indepen-
dent pulsed dimming in addition to providing the on and
off control of the outputs. Wave-shaping circuitry reduces
EMI while providing fast turn-on and turn-off times.
The MAX16823 is well suited for automotive applications
requiring a high-voltage input and is able to withstand
load-dump events up to 45V. On-board pass elements
minimize external components while providing
±5%
LED
current accuracy. Additional features include an active-
high, open-drain LEDGOOD output for open LED detec-
tion, a +3.4V (±5%) regulated output with 4mA output
current capability, short-circuit and thermal protections.
The MAX16823 is available in thermally enhanced 5mm x
5mm, 16-pin TQFN-EP and 16–pin TSSOP-EP packages
and is specified over the -40°C to +125°C automotive
temperature range.
Features
o
5.5V to 40V Operating Range
o
Adjustable Constant Output Current
(5mA to 100mA and Up to 2A with External BJT)
o
±5% Output Current Accuracy
o
Open LED Detection
o
Three Independent High-Voltage DIM Inputs
o
Three Integrated Pass Elements with Low
Dropout Voltage (0.7V max)
o
Undervoltage Lockout
o
Output Short-Circuit Protection
o
3.4V Voltage Regulator with 4mA Capability
o
Accurate, Low 203mV Current Sense
o
Overtemperature Shutdown
o
-40°C to +125°C Operating Temperature Range
MAX16823
Ordering Information
PART
MAX16823ATE+
MAX16823ATE/V+
MAX16823AUE+
TEMP RANGE
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
PIN-PACKAGE
16 TQFN-EP*
16 TQFN-EP*
16 TSSOP-EP*
Applications
Automotive Exterior: Rear Combination Lights
(RCLs), CHMSL
Automotive Interior: RGB Ambient Lighting,
Cluster Lighting, and LCD Backlighting
Emergency Vehicle Warning Lights
Navigation and Marine Indicators
Architectural and Industrial Lighting
MAX16823AUE/V+
-40°C to +125°C
16 TSSOP-EP*
+Denotes
a lead(Pb)-free/RoHS-compliant package.
*EP
= Exposed pad.
/V Denotes an automotive qualified part.
Pin Configurations appear at end of data sheet.
Typical Operating Circuit
V
IN
IN
C
IN
IN
IN
DIM1
DIM2
REG
R
LEDGOOD
LEDGOOD
LGC
REG
C
LGC
C
REG
GND
DIM3
OUT1
MAX16823
OUT2
OUT3
CS1
CS2
CS3
CS1
CS2
CS3
________________________________________________________________
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.