LT1182 查看數據表（PDF） - Linear Technology
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LT1182 Datasheet PDF : 24 Pages
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LT1182/LT1183/LT1184/LT1184F
ELECTRICAL CHARACTERISTICS
TA = 25°C, VIN = 5V, BAT = Royer = Bulb = 12V, ICCFL = SHUTDOWN = CCFL VSW = Open, DIO = GND, CCFL VC = 0.5V,
(LT1182/LT1183) LCD VC = 0.5V, LCD VSW = Open, (LT1182) FBN = FBP = GND, (LT1183) FB = GND,
(LT1183/LT1184/LT1184F) REF = Open, unless otherwise specified.
SYMBOL PARAMETER
IQ
Supply Current
ISHDN
f
SHUTDOWN Supply Current
SHUTDOWN Input Bias Current
SHUTDOWN Threshold Voltage
Switching Frequency
DC(MAX) Maximum Switch Duty Cycle
CONDITIONS
LT1182/LT1183: 3V ≤ VIN ≤ 30V
LT1184/LT1184F: 3V ≤ VIN ≤ 30V
SHUTDOWN = 0V, CCFL VC = LCD VC = Open (Note 2)
SHUTDOWN = 0V, CCFL VC = LCD VC = Open
Measured at CCFL VSW and LCD VSW, ISW = 50mA,
ICCFL = 100µA, CCFL VC = Open, (LT1182) FBN = FBP =
1V, (LT1183) FB = 1V, (LT1182/LT1183) LCD VC = Open
Measured at CCFL VSW and LCD VSW
BV
Switch Breakdown Voltage
Switch Leakage Current
ICCFL Summing Voltage
Measured at CCFL VSW and LCD VSW
VSW = 12V, Measured at CCFL VSW and LCD VSW
VSW = 30V, Measured at CCFL VSW and LCD VSW
3V ≤ VIN ≤ 30V, Measured on LT1182/LT1183
3V ≤ VIN ≤ 30V, Measured on LT1184/LT1184F
ILIM1
VSAT1
∆IQ
∆ISW1
VREF
∆ICCFL Summing Voltage for
∆Input Programming Current
CCFL VC Offset Sink Current
∆CCFL VC Source Current for
∆ICCFL Programming Current
CCFL VC to DIO Current Servo Ratio
CCFL VC Low Clamp Voltage
CCFL VC High Clamp Voltage
CCFL VC Switching Threshold
CCFL High-Side Sense Servo Current
CCFL High-Side Sense Servo Current
Line Regulation
CCFL High-Side Sense Supply Current
Bulb Protect Servo Voltage
Bulb Input Bias Current
CCFL Switch Current Limit
CCFL Switch On-Resistance
Supply Current Increase During
CCFL Switch On-Time
Reference Voltage
ICCFL = 0µA to 100µA
CCFL VC = 1.5V, Positive Current Measured into Pin
ICCFL = 25µA, 50µA, 75µA, 100µA,
CCFL VC = 1.5V
DIO = 5mA out of Pin, Measure IVC at CCFL VC = 1.5V
VBAT – VBULB = Bulb Protect Servo Voltage
ICCFL = 100µA
CCFL VSW DC = 0%
ICCFL = 100µA, IVC = 0µA at CCFL VC = 1.5V
BAT = 5V to 30V, ICCFL = 100µA,
IVC = 0µA at CCFL VC = 1.5V
Current Measured into BAT and Royer Pins
ICCFL = 100µA, IVC = 0µA at CCFL VC = 1.5V,
Servo Voltage Measured Between BAT and Bulb Pins
ICCFL = 100µA, IVC = 0µA at CCFL VC = 1.5V
Duty Cycle = 50%
Duty Cycle = 75% (Note 3)
CCFL ISW = 1A
CCFL ISW = 1A
Measured at REF (Pin 11) on LT1183/LT1184/LT1184F
Reference Output Impedance
Measured at REF (Pin 11) on LT1183
Measured at REF (Pin 11) on LT1184/LT1184F
MIN
q
q
q 0.6
175
TYP MAX UNITS
9
14
mA
6 9.5
mA
35 70
µA
3
6
µA
0.85 1.2
V
200 225
kHz
q 160 200 240
kHz
80
85
%
q 75
85
%
60
70
V
20
µA
40
µA
0.41 0.45 0.49
V
q 0.37 0.45 0.54
V
0.425 0.465 0.505
V
q 0.385 0.465 0.555
V
5
15
mV
–5
q 4.70
5
15
µA
4.95 5.20 µA/µA
q 94
q
q 1.7
q 0.6
q 0.93
99 104 µA/mA
0.1 0.3
V
2.1 2.4
V
0.95 1.3
V
1.00 1.07
A
0.1 0.16 %/V
q 50 100 150
µA
q 6.5 7.0 7.5
V
5
9
µA
q 1.25 1.9 3.0
A
q 0.9 1.6 2.6
A
q
0.6 1.0
Ω
20 30 mA/A
1.224 1.244 1.264
V
q 1.214 1.244 1.274
V
q 20
45 70
Ω
q5
15 30
Ω
3
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