MAX16823_15 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – High-Voltage, 3-Channel Linear High-Brightness LED Driver with Open LED Detection

MAX16823
EVALUATION KIT AVAILABLE
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 (HB LEDs). 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 independent 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
detection, 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
Features
●● 5.5V to 40V Operating Range
●● Adjustable Constant Output Current
(5mA to 100mA and Up to 2A with External BJT)
●● ±5% Output Current Accuracy
●● Open LED Detection
●● Three Independent High-Voltage DIM Inputs
●● Three Integrated Pass Elements with Low Dropout
Voltage (0.7V max)
●● Undervoltage Lockout
●● Output Short-Circuit Protection
●● 3.4V Voltage Regulator with 4mA Capability
●● Accurate, Low 203mV Current Sense
●● Overtemperature Shutdown
●● -40°C to +125°C Operating Temperature Range
Ordering Information appears at end of data sheet.
Typical Operating Circuit
VIN
IN
CIN
IN
IN
OUT1
OUT2
OUT3
DIM1
MAX16823
DIM2
REG
DIM3
RLEDGOOD
CS1
LEDGOOD
LGC
CS2
REG
CS3
CLGC
CREG
GND
CS1
CS2
CS3
19-0733; Rev 4; 8/15