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S P 7 6 1 6
H i g h A c c u r a c y 4 - C h a n n e l L o w S i d e L E D D r i v e r f o r
C C F L R e p l a c e m e n t
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation of
the device at these ratings or any other above those
indicated in the operation sections of the specifications
below is not implied. Exposure to absolute maximum
rating conditions for extended periods of time may affect
reliability.
V IN ............................................................ -0.3V to 32V
LED1, LED2, LED3, LED4 ............................. -0.3V to 32V
OPERATING RATINGS
Input Voltage Range V IN ................................4.5V to 30V
Junction Temperature Range ....................-40°C to 100°C
Thermal Resistance θ JA ...................................... 59°C/W
ESD Rating (HBM - Human Body Model) .................... 2kV
ESD Rating (MM - Machine Model)........................... 500V
Operating Junction Temperature ............ -40°C to +125°C
Power Dissipation.................................Internally Limited
I SET , PWM ................................................. -0.3V to 6.0V
Storage Temperature .............................. -65°C to 150°C
Power Dissipation ................................ Internally Limited
Lead Temperature (Soldering, 10 sec) ................... 300°C
ELECTRICAL SPECIFICATIONS
Specifications with standard type are for an Operating Junction Temperature of T J = 25°C only; limits applying over the full
Operating Junction Temperature range are denoted by a “?”. Minimum and Maximum limits are guaranteed through test,
design, or statistical correlation. Typical values represent the most likely parametric norm at T J = 25°C, and are provided for
reference purposes only. Unless otherwise indicated, V IN = 4.5V to 30V, C IN = 1uF, T J = –40°C to 125°C.
Parameter
Min.
Typ.
Max.
Units
Conditions
Operating Input Voltage Range
Shutdown Supply Current
Quiescent Supply Current
Quiescent Supply Current
Quiescent Supply Current
4.5
30
350
1
1.5
30
60
500
1.5
3
V
μ A
μ A
mA
mA
?
Voltage at I SET is pulled to 3V Vin 30V
No LED connected, V LED pins are tied to
GND. R SET =1M Ω
I LED = 30mA
I LED = 60mA
LED Current Matching
LED Current Line Regulation
Line Regulation
-3
0.5
0.1
0.05
3
1
0.1
%
%/V
%/V
?
Relative to average of all 4 channels
V LED = 0.5V to 25V , V IN = 28V,
R SET =50k Ω
V IN = 4.5V to 25V, V LED =0.5V (Note 2)
Maximum LED Current per
channel
LED Leakage Current
60
2
mA
μ A
RSET = 17.4k Ω ,
PWM pin LOW, V LED = 1V, V IN = 5V
Dropout Voltage
0.30
0.45
V
(Note 3)
Output Current Multiplication
1032
1075
1118
I LED = 30mA, R SET =35.833k Ω ,
Ratio K = I LED ?R SET
1000
1075
1130
?
0°C ≤ T J ≤ 125°C
I SET Voltage
1
V
Thermal Shutdown Die
Temperature
150
° C
I LED = 0mA. LED current will self recover
when temperature drops below the trip
Thermal Shutdown Hysteresis
PWM Pin Logic LOW
PWM Pin Logic HIGH
PWM pin Hysteresis
2.4
15
400
20
0.8
5.5
° C
V
V
mV
point, minus thermal shut down
hysteresis.
Driver is disabled
Driver is active
I SET Shutdown Threshold
I SET Shutdown Threshold
Hysteresis
Typical PWM Maximum Dimming
Frequency
0.3
3
5
V
V
kHz
?
If I SET is pulled above this threshold the
device goes into full shutdown
Applied to PWM pin. See typical
performance curves.
Typical PWM Dimming Duty
Cycle Range
? 2009 Exar Corporation
10
90
2/11
%
Applied to PWM pin @ 5kHz. See typical
performance curves.
Rev. 2.0.4
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