参数资料
| 型号： | LT1184FIS#TR |
| 厂商： | Linear Technology |
| 文件页数： | 4/24页 |
| 文件大小： | 0K |
| 描述： | IC REG SWITCH DUAL CCFL 16SOIC |
| 标准包装： | 2,500 |
| 应用： | 转换器，CCFL，LCD |
| 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
REF1
PARAMETER
V REF – I CCFL Summing Voltage
V REF – I CCFL Summing Voltage
LCD FBP/FB Reference Voltage
REF1 Voltage Line Regulation
FBP/FB Input Bias Current
LCD FBN/FB Offset Voltage
Offset Voltage Line Regulation
FBN/FB Input Bias Current
CONDITIONS
Measured on LT1183
Measured on LT1184/LT1184F
LT1182: Measured at FBP Pin, FBN = 1V, LCD V C = 0.8V
LT1183: Measured at FB Pin, LCD V C = 0.8V
3V ≤ V IN ≤ 30V, LCD V C = 0.8V
LT1182: FBP = REF1, FBN = 1V, LCD V C = 0.8V
LT1183: FB = REF1, LCD V C = 0.8V
LT1182: Measured at FBN Pin, FBP = 0V, LCD V C = 0.8V
LT1183: Measured at FB Pin, LCD V C = 0.8V
3V ≤ V IN ≤ 30V, LCD V C = 0.8V
LT1182: FBN = Offset Voltage, FBP = 0V, LCD V C = 0.8V
LT1183: FB = Offset Voltage, LCD V C = 0.8V
q
q
q
q
q
q
q
q
MIN
0.760
0.725
0.740
0.705
1.224
1.214
– 20
– 27
– 3.0
TYP
0.795
0.795
0.775
0.775
1.244
1.244
0.01
0.35
– 12
– 12
0.01
– 1.0
MAX
0.830
0.865
0.810
0.845
1.264
1.274
0.03
1.0
–4
–1
0.2
UNITS
V
V
V
V
V
V
%/V
μ A
mV
mV
%/V
μ A
g m
FBP/FB to LCD V C Transconductance
FBN/FB to LCD V C Transconductance
LCD Error Amplifier Source Current
LT1182: ? I VC = ± 25 μ A, FBN = 1V
LT1183: ? I VC = ± 25 μ A
LT1182: ? I VC = ± 25 μ A, FBP = GND
LT1183: ? I VC = ± 25 μ A
LT1182: FBP = FBN = 1V or 0.25V,
q
q
q
650
500
550
400
50
900
900
800
800
100
1150
1300
1050
1200
175
μ mhos
μ mhos
μ mhos
μ mhos
μ A
LT1183: FB = 1V or 0.25V
LCD Error Amplifier Sink Current
LT1182: FBP = FBN = 1.5V or – 0.25V,
q
35
100
175
μ A
LT1183: FB = 1.5V or – 0.25V
LCD V C Low Clamp Voltage
LT1182: FBP = FBN = 1.5V, LT1183: FB = 1.5V
0.01
0.3
V
LCD V C High Clamp Voltage
LCD V C Switching Threshold
LT1182: FBP = FBN = 1V, LT1183: FB = 1V
LT1182: FBP = FBN = 1V, LT1183: FB = 1V, V SW DC = 0%
1.7
0.6
2.0
0.95
2.4
1.3
V
V
I LIM2
V SAT2
? I Q
? I SW2
LCD Switch Current Limit
LCD Switch On-Resistance
Supply Current Increase During
LCD Switch On-Time
Duty Cycle = 50%
Duty Cycle = 75% (Note 3)
LCD I SW = 0.5A
LCD I SW = 0.5A
q
q
q
0.625
0.400
1.00
0.85
1.0
20
1.5
1.3
1.65
30
A
A
?
mA/A
Switch Minimum On-Time
Measured at CCFL V SW and LCD V SW
0.45
μ s
The q denotes specifications which apply over the specified operating
temperature range.
Note 1: T J is calculated from the ambient temperature T A and power
dissipation P D according to the following formula:
LT1182CS/LT1183CS/LT1184CS/LT1184FCS: T J = T A + (P D × 100 ° C/W)
4
Note 2: Does not include switch leakage.
Note 3: For duty cycles (DC) between 50% and 75%, minimum
guaranteed switch current is given by I LIM = 1.4(1.393 – DC) for the CCFL
regulator and I LIM = 0.7(1.393 – DC ) for the LCD contrast regulator due to
internal slope compensation circuitry.
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