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High-Voltage, 3-Channel Linear High-Brightness
LED Driver with Open LED Detection
ABSOLUTE MAXIMUM RATINGS
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
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
(except IN, OUT1, OUT2, OUT3)..................................±20mA
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.
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_ = 2.85 Ω 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)
PARAMETER
Supply Voltage Range
Undervoltage Lockout
Ground Current
SYMBOL
V IN
UVLO
I G
CONDITIONS
V IN rising
V IN falling
I OUT1 = I OUT2 = I OUT3 = 70mA
MIN
5.5
4.4
4.0
TYP
4.9
4.6
1.5
MAX
40
5.4
5.2
3
UNITS
V
V
mA
Guaranteed Output Current
LED Current-Sense Accuracy
I OUT
5mA ≤ I OUT_ ≤ 70mA
100
5
mA
%
Dropout Voltage (Note 2)
Δ VDO
I OUT_ = 70mA, 6.5V ≤ V IN ≤ 40V
I OUT_ = 70mA, 5.5V ≤ V IN ≤ 6.5V
0.3
0.3
0.7
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
LGC Input Upper Threshold
LGC Input Lower Threshold
LGC Pulldown Current
V UTH
V LTH
V LGC > V UTH
65
100
2.53
0.8
20
135
k Ω
V
V
mA
LGC Clock Period
C LGC = 15nF
0.77
1.5
2.3
ms
DIMMING INPUT (DIM1, DIM2, DIM3)
DIM_ Logic-Input Bias Current
DIM_ Input-Voltage High
DIM_ Input-Voltage Low
DIM_ Frequency
I DIM_
-0.1
2.4
0
+0.1
V IN
0.6
3
μA
V
V
kHz
OUTPUTS (OUT1, OUT2, AND OUT3) (Note 3)
Turn-On Time
Turn-Off Time
Output Current Rise Time
Output Current Fall Time
DIM_ rising edge to 90% of OUT_ current
DIM_ falling edge to 10% of OUT_ current
10% to 90%
90% to 10%
12
8
7
6
28
18
18
15
μs
μs
μs
μs
2
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