MAX8722EEG Ver la hoja de datos (PDF) - Maxim Integrated
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componentes Descripción
Fabricante
MAX8722EEG Datasheet PDF : 20 Pages
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Low-Cost CCFL Backlight Controller
ABSOLUTE MAXIMUM RATINGS
BATT to GND..........................................................-0.3V to +30V
BST1, BST2 to GND ...............................................-0.3V to +36V
BST1 to LX1, BST2 to LX2 ........................................-0.3V to +6V
CNTL, FREQ, SYNC, VCC, VDD to GND ...................-0.3V to +6V
COMP, DPWM, ILIM, TFLT to GND ............-0.3V to (VCC + 0.3V)
GH1 to LX1 ..............................................-0.3V to (VBST1 + 0.3V)
GH2 to LX2 ..............................................-0.3V to (VBST2 + 0.3V)
GL1, GL2 to GND .......................................-0.3V to (VDD + 0.3V)
IFB, ISEC, VFB to GND................................................-3V to +6V
SHDN to GND...........................................................-0.3V to +6V
PGND to GND .......................................................-0.3V to +0.3V
Continuous Power Dissipation (TA = +70°C)
24-Pin QSOP (derate 9.5mW/°C above +70°C)........761.9mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°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. VBATT = 12V, VCC = VDD, VSHDN = 5.3V, TA = 0°C to +85°C. Typical values are at TA = +25°C, unless otherwise noted.)
PARAMETER
BATT Input Voltage Range
BATT Quiescent Current
BATT Quiescent Current,
Shutdown
CONDITIONS
VCC = VDD = VBATT
VCC = VDD = open
VSHDN = VCC, VIFB = 1V
VBATT = 28V
VBATT = VCC = 5V
SHDN = GND
MIN TYP MAX UNITS
4.6
5.5
V
5.5
28.0
1
2
mA
2
6
20
µA
VCC Output Voltage, Normal
Operation
VCC Output Voltage, Shutdown
VCC Undervoltage-Lockout
Threshold
VCC Undervoltage-Lockout
Hysteresis
VSHDN = 5.5V, 6V < VBATT < 28V,
0 < ILOAD < 10mA
SHDN = GND, no load
VCC rising (leaving lockout)
VCC falling (entering lockout)
5.25 5.40 5.55
V
3.5
4.6
5.5
V
4.58
V
4.0
200
mV
GH1, GH2, GL1, GL2 On-
Resistance, High
ITEST = 10mA, VCC = VDD = 5.3V
20
37
Ω
GH1, GH2, GL1, GL2 On-
Resistance, Low
ITEST = 10mA, VCC = VDD = 5.3V
10
20
Ω
GH1, GH2, GL1, GL2 Maximum
Output Current
0.3
A
BST1, BST2 Leakage Current
Resonant Frequency Range
Minimum Off-Time
Maximum Off-Time
VBST_ = 12V, VLX_ = 7V
Guaranteed by design
5
µA
30
80
kHz
340 470 600
ns
24
33
43
µs
Current-Limit Threshold
LX1 to PGND, LX2 to PGND
(Fixed)
ILIM = VCC
180 200 220
mV
Current-Limit Threshold
LX1 to PGND, LX2 to PGND
(Adjustable)
VILIM = 0.5V
VILIM = 2.0V
80
100 120
mV
370 400 430
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