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MAX8722 Datasheet(PDF) 4 Page - Maxim Integrated Products

Part # MAX8722
Description  Low-Cost CCFL Backlight Controller
PDF  20 Pages
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX8722 Datasheet(HTML) 4 Page - Maxim Integrated Products

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Low-Cost CCFL Backlight Controller
4
_______________________________________________________________________________________
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
CONDITIONS
MIN
TYP
MAX
UNITS
SHDN Input Low Voltage
0.8
V
SHDN Input High Voltage
2.1
V
SHDN Input Bias Current
-1
+1
µA
FREQ Dual Mode
 Input High
Level
VCC -
0.35
V
FREQ Input Regulation Level
VCC / 2
V
FREQ Input Bias Current
FREQ = VCC
230
µA
VISEC < 1.25V and VIFB < 600mV; VFLT = 2V
0.95
1.00
1.05
VISEC < 1.25V and VIFB > 600mV; VFLT = 2V
-1
TFLT Charge Current
VISEC > 1.25V and VIFB < 600mV; VFLT = 2V
116
µA
TFLT Trip Threshold
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
CONDITIONS
MIN
TYP
MAX
UNITS
VCC = VDD = VBATT
4.6
5.5
BATT Input Voltage Range
VCC = VDD = open
5.5
28.0
V
VBATT = 28V
2
BATT Quiescent Current
VSHDN = VCC, VIFB = 1V
VBATT = VCC = 5V
2
mA
BATT Quiescent Current,
Shutdown
SHDN = GND
20
µA
VCC Output Voltage, Normal
Operation
VSHDN = 5.5V, 6V < VBATT < 28V
0 < ILOAD < 20mA
5.25
5.55
V
VCC Output Voltage, Shutdown
SHDN = GND, no load
3.5
5.5
V
VCC rising (leaving lockout)
4.58
VCC Undervoltage-Lockout
Threshold
VCC falling (entering lockout)
4.0
V
GH1, GH2, GL1, GL2 On-
Resistance, High
ITEST =10mA, VCC = VDD = 5.3V
37
Ω
GH1, GH2, GL1, GL2 On-
Resistance, Low
ITEST =10mA, VCC = VDD = 5.3V
20
Ω
BST1, BST2 Leakage Current
VBST_ = 12V, VLX_ = 7V
5
µA
Resonant Frequency Range
Guaranteed by design
30
80
kHz
Minimum Off-Time
340
600
ns
Maximum Off-Time
24
43
µs
Current-Limit Threshold
LX1 - PGND, LX2 - PGND (Fixed)
ILIM = VCC
180
220
mV



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