MAX8709B Просмотр технического описания (PDF) - Maxim Integrated
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MAX8709B Datasheet PDF : 24 Pages
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High-Efficiency CCFL Backlight
Controller with SMBus Interface
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1. VBATT = 12V, VLOT = VREF, VCC = VDD, VSUS = 5.3V, TA = -40°C to +85°C. Typical values are at TA = +25°C,
unless otherwise noted.) (Note 2)
PARAMETER
VBATT Input Voltage Range
VBATT Quiescent Current
VBATT Quiescent Current, Shutdown
VCC Output Voltage, Normal Operation
VCC Output Voltage, Shutdown
VCC Undervoltage-Lockout Threshold
VCC Power-On Reset (POR) Threshold
REF Output Voltage, Normal Operation
GH1, GH2, GL1, GL2 On-Resistance
BST1, BST2 Leakage Current
Input Resonant Frequency
Minimum Off-Time
Maximum Off-Time
Current-Limit Threshold
LX1 - GND, LX2 - GND (Fixed)
Current-Limit Threshold
LX1 - GND, LX2 - GND (Adjustable)
Current-Limit Leading-Edge Blanking
LOT Input Voltage Range
LOT Input Bias Current
IFB Input Voltage Range
IFB Regulation Point
IFB Input Bias Current
IFB Lamp-Out Threshold
ISEC Input Voltage Range
ISEC Regulation Point
ISEC Input Bias Current
VFB Input Voltage Range
VFB Input Bias Current
VFB Regulation Point
VFB Zero-Voltage Crossing Threshold
DPWM Chopping Frequency
CONDITIONS
VCC = VDD = VBATT
VCC = VDD = open
VSUS = 5.5V
SUS = GND
VBATT = 28V
VBATT = VCC = 5V
VSUS = 5.5V, 6V < VBATT < 28V,
0 < ILOAD < 20mA
SUS = GND, no load
VCC rising (leaving lockout)
VCC falling (entering lockout)
Rising edge
4.5V < VCC < 5.5V, ILOAD = 40µA
ITEST = 100mA, VCC = VDD = 5.3V
VBST_ = 12V, VLX_ = 7V
Guaranteed by design
MIN
4.6
5.5
5.0
3.5
4.0
0.90
1.95
25
180
18
ILIM = VCC
180
VILIM = 0.5V
VILIM = 2.0V
VIFB = 0.4V
LOT = REF
VISEC = 1.25V
VVFB = 0.5V
80
370
250
0.5
-2
-1.7
380
-2
500
-2
1.20
-2
-2
-0.5
490
-10
204
TYP
MAX
5.5
28.0
3
3
20
5.5
5.5
4.5
2.70
2.05
18
5
300
380
38
220
120
430
450
VREF
+2
+1.7
420
+2
700
+2
1.30
+2
+2
+0.5
530
+10
216
UNITS
V
mA
µA
V
V
V
V
V
Ω
µA
kHz
ns
µs
mV
mV
ns
V
µA
V
mV
µA
mV
V
V
µA
V
µA
mV
mV
Hz
4 _______________________________________________________________________________________
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