MAX8722 Ver la hoja de datos (PDF) - Maxim Integrated
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MAX8722 Datasheet PDF : 20 Pages
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Low-Cost CCFL Backlight Controller
ELECTRICAL CHARACTERISTICS (continued)
(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
SHDN Input Low Voltage
SHDN Input High Voltage
SHDN Input Bias Current
CONDITIONS
MIN TYP MAX UNITS
0.8
V
2.1
V
-1
+1
µA
FREQ Dual Mode Input High
Level
VCC -
V
0.35
FREQ Input Regulation Level
FREQ Input Bias Current
TFLT Charge Current
TFLT Trip Threshold
FREQ = VCC
VISEC < 1.25V and VIFB < 600mV; VFLT = 2V
VISEC < 1.25V and VIFB > 600mV; VFLT = 2V
VISEC > 1.25V and VIFB < 600mV; VFLT = 2V
VCC / 2
V
230
µA
0.95 1.00 1.05
-1
µA
116
3.95 4.10 4.20
V
Dual Mode is a trademark of Maxim Integrated Products, Inc.
ELECTRICAL CHARACTERISTIC
(Circuit of Figure 1. VBATT = 12V, VCC = VDD, VSHDN = 5.3V, TA = -40°C to +85°C, unless otherwise noted.) (Note 1)
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
4.6
5.5
5.5
28.0
2
2
20
VCC Output Voltage, Normal
Operation
VCC Output Voltage, Shutdown
VCC Undervoltage-Lockout
Threshold
GH1, GH2, GL1, GL2 On-
Resistance, High
VSHDN = 5.5V, 6V < VBATT < 28V
0 < ILOAD < 20mA
SHDN = GND, no load
VCC rising (leaving lockout)
VCC falling (entering lockout)
ITEST =10mA, VCC = VDD = 5.3V
5.25
5.55
3.5
5.5
4.58
4.0
37
GH1, GH2, GL1, GL2 On-
Resistance, Low
BST1, BST2 Leakage Current
Resonant Frequency Range
Minimum Off-Time
Maximum Off-Time
Current-Limit Threshold
LX1 - PGND, LX2 - PGND (Fixed)
ITEST =10mA, VCC = VDD = 5.3V
VBST_ = 12V, VLX_ = 7V
Guaranteed by design
ILIM = VCC
20
5
30
80
340
600
24
43
180
220
UNITS
V
mA
µA
V
V
V
Ω
Ω
µA
kHz
ns
µs
mV
4 _______________________________________________________________________________________
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