MAX16823_09 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – High-Voltage, 3-Channel Linear High-Brightness LED Driver with Open LED Detection

19-0733; Rev 3; 9/09
EVAALVUAAILTAIOBNLEKIT
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.
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
VIN
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
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX16823ATE+
-40°C to +125°C 16 TQFN-EP*
MAX16823ATE/V+ -40°C to +125°C 16 TQFN-EP*
MAX16823AUE+
-40°C to +125°C 16 TSSOP-EP*
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
IN
OUT1
CIN
IN _MAX16823 OUT2
IN
OUT3
DIM1
DIM2
REG
DIM3
RLEDGOOD
CS1
LEDGOOD
LGC
CS2
REG
CS3
CLGC
CREG
GND
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.