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参数资料
| 型号： | LT1184FIS#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 3/24页 |
| 文件大小： | 0K |
| 描述： | IC SW REG CCFL CONTRAST 16-SOIC |
| 标准包装： | 2,500 |
| 应用： | 转换器，CCFL |
| 输入电压： | 3 V ~ 30 V |
| 输出数： | 1 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-SOIC |
| 包装： | 带卷 (TR) |
LT1182/LT1183/LT1184/LT1184F
ELECTRICAL CHARACTERISTICS
T A = 25 ° C, V IN = 5V, BAT = Royer = Bulb = 12V, I CCFL = SHUTDOWN = CCFL V SW = Open, DIO = GND, CCFL V C = 0.5V,
(LT1182/LT1183) LCD V C = 0.5V, LCD V SW = Open, (LT1182) FBN = FBP = GND, (LT1183) FB = GND,
(LT1183/LT1184/LT1184F) REF = Open, unless otherwise specified.
SYMBOL
I Q
I SHDN
f
DC(MAX)
PARAMETER
Supply Current
SHUTDOWN Supply Current
SHUTDOWN Input Bias Current
SHUTDOWN Threshold Voltage
Switching Frequency
Maximum Switch Duty Cycle
CONDITIONS
LT1182/LT1183: 3V ≤ V IN ≤ 30V
LT1184/LT1184F: 3V ≤ V IN ≤ 30V
SHUTDOWN = 0V, CCFL V C = LCD V C = Open (Note 2)
SHUTDOWN = 0V, CCFL V C = LCD V C = Open
Measured at CCFL V SW and LCD V SW , I SW = 50mA,
I CCFL = 100 μ A, CCFL V C = Open, (LT1182) FBN = FBP =
1V, (LT1183) FB = 1V, (LT1182/LT1183) LCD V C = Open
Measured at CCFL V SW and LCD V SW
q
q
q
q
MIN
0.6
175
160
80
TYP
9
6
35
3
0.85
200
200
85
MAX
14
9.5
70
6
1.2
225
240
UNITS
mA
mA
μ A
μ A
V
kHz
kHz
%
q
75
85
%
BV
Switch Breakdown Voltage
Switch Leakage Current
Measured at CCFL V SW and LCD V SW
V SW = 12V, Measured at CCFL V SW and LCD V SW
V SW = 30V, Measured at CCFL V SW and LCD V SW
60
70
20
40
V
μ A
μ A
I CCFL Summing Voltage
? I CCFL Summing Voltage for
? Input Programming Current
CCFL V C Offset Sink Current
3V ≤ V IN ≤ 30V, Measured on LT1182/LT1183
3V ≤ V IN ≤ 30V, Measured on LT1184/LT1184F
I CCFL = 0 μ A to 100 μ A
CCFL V C = 1.5V, Positive Current Measured into Pin
q
q
0.41
0.37
0.425
0.385
–5
0.45
0.45
0.465
0.465
5
5
0.49
0.54
0.505
0.555
15
15
V
V
V
V
mV
μ A
? CCFL V C Source Current for
? I CCFL Programming Current
CCFL V C to DIO Current Servo Ratio
CCFL V C Low Clamp Voltage
CCFL V C High Clamp Voltage
CCFL V C 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
I CCFL = 25 μ A, 50 μ A, 75 μ A, 100 μ A,
CCFL V C = 1.5V
DIO = 5mA out of Pin, Measure I VC at CCFL V C = 1.5V
V BAT – V BULB = Bulb Protect Servo Voltage
I CCFL = 100 μ A
CCFL V SW DC = 0%
I CCFL = 100 μ A, I VC = 0 μ A at CCFL V C = 1.5V
BAT = 5V to 30V, I CCFL = 100 μ A,
I VC = 0 μ A at CCFL V C = 1.5V
Current Measured into BAT and Royer Pins
I CCFL = 100 μ A, I VC = 0 μ A at CCFL V C = 1.5V,
q
q
q
q
q
q
q
q
4.70
94
1.7
0.6
0.93
50
6.5
4.95
99
0.1
2.1
0.95
1.00
0.1
100
7.0
5.20
104
0.3
2.4
1.3
1.07
0.16
150
7.5
μ A/ μ A
μ A/mA
V
V
V
A
%/V
μ A
V
Servo Voltage Measured Between BAT and Bulb Pins
Bulb Input Bias Current
I CCFL = 100 μ A, I VC = 0 μ A at CCFL V C = 1.5V
5
9
μ A
I LIM1
V SAT1
? I Q
? I SW1
V REF
CCFL Switch Current Limit
CCFL Switch On-Resistance
Supply Current Increase During
CCFL Switch On-Time
Reference Voltage
Duty Cycle = 50%
Duty Cycle = 75% (Note 3)
CCFL I SW = 1A
CCFL I SW = 1A
Measured at REF (Pin 11) on LT1183/LT1184/LT1184F
q
q
q
1.25
0.9
1.224
1.9
1.6
0.6
20
1.244
3.0
2.6
1.0
30
1.264
A
A
?
mA/A
V
q
1.214
1.244
1.274
V
Reference Output Impedance
Measured at REF (Pin 11) on LT1183
Measured at REF (Pin 11) on LT1184/LT1184F
q
q
20
5
45
15
70
30
?
?
3
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