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MAX16823AUE/V+

P1-P3P4-P6P7-P9P10-P12
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
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
High-Voltage, 3-Channel Linear High-Brightness
LED Driver with Open LED Detection
________________________________________________________________
Maxim Integrated Products
1
CS1 CS2 CS3
OUT3
CS1
CS2
CS3
GND
LEDGOOD
DIM2
DIM1
V
IN
C
IN
IN
IN
IN
R
LEDGOOD
C
LGC
REG
C
REG
LGC
DIM3
REG
OUT2
OUT1
MAX16823
Ordering Information
Typical Operating Circuit
19-0733; Rev 3; 9/09
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.
Pin Configurations appear at end of data sheet.
EVALUATION KIT
AVAILABLE
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.
MAX16823
High-Voltage, 3-Channel Linear High-Brightness
LED Driver with Open LED Detection
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
IN
= 12V, C
REG
= 0.1µF, I
REG
= 0, C
LGC
= 15nF, V
DIM1
= V
DIM2
= V
DIM3
= 3.4V, R
CS_
= 2.85Ω from CS_ to GND, T
J
= T
A
= -40°C
to +125°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage Range V
IN
5.5 40 V
V
IN
rising 4.4 4.9 5.4
Undervoltage Lockout UVLO
V
IN
falling 4.0 4.6 5.2
V
Ground Current I
G
I
OUT1
= I
OUT2
= I
OUT3
= 70mA 1.5 3 mA
Guaranteed Output Current I
OUT
100 mA
LED Current-Sense Accuracy 5mA ≤ I
OUT_
≤ 70mA 5 %
I
OUT_
= 70mA, 6.5V ≤ V
IN
≤ 40V 0.3 0.7
Dropout Voltage (Note 2) ΔVDO
I
OUT_
= 70mA, 5.5V ≤ V
IN
≤ 6.5V 0.3 0.8
V
Output Current Slew Rate 8 mA/µs
Short-Circuit Current V
OUT_
= 0V 180 mA
LEDGOOD
LEDGOOD Output Logic Low V
OL
I
SINK
= 2mA 0.4 V
LGC Pullup Resistor 65 100 135 kΩ
LGC Input Upper Threshold V
UTH
2.53 V
LGC Input Lower Threshold V
LTH
0.8 V
LGC Pulldown Current V
LGC
> V
UTH
20 mA
LGC Clock Period C
LGC
= 15nF 0.77 1.5 2.3 ms
DIMMING INPUT (DIM1, DIM2, DIM3)
DIM_ Logic-Input Bias Current I
DIM_
-0.1 +0.1 µA
DIM_ Input-Voltage High 2.4 V
IN
V
DIM_ Input-Voltage Low 0.6 V
DIM_ Frequency 0 3 kHz
OUTPUTS (OUT1, OUT2, AND OUT3) (Note 3)
Turn-On Time DIM_ rising edge to 90% of OUT_ current 12 28 µs
Turn-Off Time DIM_ falling edge to 10% of OUT_ current 8 18 µs
Output Current Rise Time 10% to 90% 7 18 µs
Output Current Fall Time 90% to 10% 6 15 µs
IN to GND ...............................................................-0.3V to +45V
OUT1, OUT2, OUT3, DIM1, DIM2,
DIM3 to GND ...........................................-0.3V to (V
IN
+ 0.3V)
REG, LGC, LEDGOOD to GND ................................-0.3V to +6V
CS1, CS2, CS3 to GND .........................................-0.3V to +0.5V
OUT1, OUT2, OUT3 Short Circuited
to GND Duration (V
IN
+ 16V)..........................................60min
Maximum Current into Any Pin
(except IN, OUT1, OUT2, OUT3)..................................±20mA
Continuous Power Dissipation (T
A
= +70°C)
16-Pin TQFN 5mm x 5mm
(derate 33.3mW/°C above +70°C).........................2666mW
16-Pin TSSOP (derate 26.1mW/°C above +70°C) ....2088.8mW
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
MAX16823
High-Voltage, 3-Channel Linear High-Brightness
LED Driver with Open LED Detection
_______________________________________________________________________________________ 3
Note 1: All devices 100% production tested at T
J
= +25°C. Limits over the operating temperature range are guaranteed by design.
Note 2: Dropout is measured as follows: Connect a resistor from OUT_ to CS_. Connect R
CS_
= 2.85Ω from CS_ to GND.
Set V
IN
= V
OUT
+ 3V (record V
OUT
as V
OUTA
). Reduce V
IN
until V
OUT
= 0.97 x V
OUTA
(record as V
INB
and V
OUTB
).
VDO = V
INB
- V
OUTB
.
Note 3: Output current rise and fall times are measured with a 62Ω series resistor from OUT_ to CS_.
Note 4: Overtemperature protection does not function if the output of the 3.4V reference (REG) is shorted to ground.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
CURRENT SENSE
Regulated CS_ Voltage V
CS_
5mA ≤ I
OUT
_ ≤ 70mA 193 203 213 mV
Input Current (CS1, CS2, CS3) Current out of CS_ +1.2 µA
OVERTEMPERATURE PROTECTION (Note 4)
Thermal Shutdown Temperature 155 °C
Thermal Shutdown Hysteresis 23 °C
3.4V REGULATOR (REG)
3.275 3.41 3.547
Output Voltage V
REG
0 ≤ I
REG
≤ 4mA 3.221 3.38 3.547
V
REG Short-Circuit Current V
REG
= 0V 13 mA
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= 12V, C
REG
= 0.1µF, I
REG
= 0, C
LGC
= 15nF, V
DIM1
= V
DIM2
= V
DIM3
= 3.4V, R
CS_
= 2.85Ω from CS_ to GND, T
J
= T
A
= -40°C
to +125°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
Typical Operating Characteristics
(V
IN
= 12V, C
REG
= 0.1µF, I
REG
= 0, V
LGC
= unconnected, connect R
CS_
= 2.85Ω from CS_ to GND. Connect OUT_ to CS_ through
a resistor, T
J
= -40°C to +125°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
V
CS_
vs. OUTPUT CURRENT
OUTPUT CURRENT (mA)
V
CS_
(V)
MAX16823 toc02
0 10203040506070
0.200
0.201
0.202
0.203
0.204
0.205
0.206
0.207
0.208
0.209
0.210
OUTPUT CURRENT vs. INPUT VOLTAGE
INPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
MAX16823 toc03
0 5 10 15 20 25 30 35 40
0
10
20
30
40
50
60
70
80
90
100
I
OUT
= 70mA
I
OUT
= 5mA
OUTPUT CURRENT vs. TEMPERATURE
TEMPERATURE (°C )
OUTPUT CURRENT (mA)
MAX16823 toc01
-40 -25 -10 5 20 35 50 65 80 95 110 125
0
10
20
30
40
50
60
70
80
90
100
I
LOAD
= 5mA
I
LOAD
= 35mA
I
LOAD
= 70mA
P1-P3P4-P6P7-P9P10-P12

MAX16823AUE/V+

Mfr. #:
Buy MAX16823AUE/V+
Manufacturer:
Maxim Integrated
Description:
LED Lighting Drivers 3Ch Linear HB w/Open LED Detection
Lifecycle:
New from this manufacturer.
Delivery:
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