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8-String White LED Driver with
SMBus for LCD Panel Applications
ABSOLUTE MAXIMUM RATINGS
IN to GND ..............................................................-0.3V to +28V
FB_, LX_ to GND ....................................................-0.3V to +45V
PGND_ to GND......................................................-0.3V to +0.3V
V CC , V DD , PWMI, SDA, SCL to GND ........................-0.3V to +6V
ISET, CCV, PWMO, FSET, OSC,
OV to GND ...............................................-0.3V to V CC + 0.3V
Continuous Power Dissipation (T A = +70°C)
28-Pin Thin QFN (derate 16.9mW/°C above +70°C) .1667mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-60°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
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
(Circuit of Figure 1. V IN = 12V, C CCV = 0.022μF, R CCV = 5.1k Ω , V ISET = V OSC = V DD = V CC = 5V, R FSET = 464k Ω , V PWMI = GND,
T A = 0°C to +85°C , unless otherwise noted. Typical values are at T A = +25°C.)
PARAMETER
IN Input Voltage Range
IN UVLO Threshold
Rising edge
Falling edge
CONDITIONS
MIN
7.5
7.08
6.86
TYP
7.2
6.98
MAX
26
7.32
7.1
UNITS
V
V
IN Input Current
V CC Input Voltage
V IN = 26V
MAX17061A is enabled
MAX17061A is disabled, T A = +25°C
+1
4.5
70
5
110
+1
5.5
μA
V
V CC UVLO Threshold
V CC Quiescent Current
V CC Shutdown Current
Rising edge, typical hysteresis = 10mV
MAX17061A is enabled
MAX17061A is disabled
4.00
4.25
1.24
4.45
2
10
V
mA
μA
BOOST CONVERTER
LX On-Resistance
20mA from LX_ to PGND
0.15
0.3
LX Leakage Current
45V on LX_, T A = +25°C
1
μA
V OSC = V CC
0.9
1.0
1.1
MHz
Operating Frequency
V OSC = open
V OSC = GND
675
450
750
500
825
550
kHz
OSC High-Level Threshold
V CC -
0.4
V
OSC Midlevel Threshold
OSC Low-Level Threshold
Minimum Duty Cycle
PWM mode (Note 1)
1.5
10
V CC -
2.0
0.4
V
V
%
Maximum Duty Cycle
LX Current Limit
Duty cycle = 75% (Note 1)
94
1.6
95.5
97
%
A
CONTRL INPUT
SDA, SCL Logic Input-High Level
2.1
SDA, SCL Logic Input-Low Level
PWMI Logic Input-High Level
PWMI Logic Input-Low Level
2.1
0.8
0.8
V
V
V
2
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