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参数资料
| 型号： | LT1249CS8#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 5/12页 |
| 文件大小： | 197K |
| 描述： | IC PFC CTRLR AVERAGE CURR 8SOIC |
| 标准包装： | 2,500 |
| 模式： | 平均电流 |
| 频率 - 开关： | 100kHz |
| 电流 - 启动： | 250µA |
| 电源电压： | 15.5 V ~ 27 V |
| 工作温度： | 0°C ~ 100°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 带卷 (TR) |
LT1249
5
PIN FUNCTIONS
U
U
TYPICAL PERFORMANCE CHARACTERISTICS
W
TEMPERATURE (癈)
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
1249 G11
75
25
25
125
50
0
50
100
Synchronization Threshold
at CA
OUT
Voltage Amp Sink Current Limits
(Threshold)
M
OUT
VOLTAGE (V)
2.4
1.2
0
1.2
1.0
0.8
0.6
0.4
0.2
0
0.2
0.4
0.6
0.8
1.0
1249 G12
1.2
2.4
125癈
25癈
50癈
M
OUT
Pin Characteristics
TEMPERATURE (癈)
1249 G15
1.30
1.25
1.20
1.15
1.10
1.05
1.00
0.95
0.90
75
25
50
25
0
50
100
75
125
Maximum Multiplier Output
Voltage (I
M(MAX)
" R
MOUT
)
Transconductance of Current
Amplifier Over Temperature
TEMPERATURE (癈)
50
100
124
1
0
50
400
350
300
250
200
150
100
50
0
25
25
75
125
Maximum Duty Cycle
TEMPERATURE (癈)
100
99
98
97
96
95
94
93
92
91
90
1249 G16
75
25
25
125
50
0
50
100
TEMPERATURE (癈)
75
25
50
25
0
50
100
75
125
1249 G14
60
50
40
30
20
10
0
UP THRESHOLD
DOWN THRESHOLD
NOTE: THESE SINK CURRENT THRESHOLDS ARE
FOR OVERVOLTAGE PROTECTION FUNCTION.
GND (Pin 1): Ground.
CA
OUT
(Pin 2): This is the output of the current amplifier
that senses and forces the line current to follow the
reference signal that comes from the multiplier by com-
manding the pulse width modulator. When CA
OUT
is low,
the modulator has zero duty cycle.
M
OUT
(Pin 3): The multiplier current goes out of this pin
through the 4k resistor R
MOUT
. The voltage developed
across R
MOUT
is the reference voltage of the current loop
and it is limited to 1.1V. The noninverting input of the
current amplifier is also tied to R
MOUT
. In operation, M
OUT
is normally at negative potential and only AC signals
appear at the noninverting input of the current amplifier.
I
AC
(Pin 4): This is the AC line voltage sensing input to the
multiplier. It is a current input that is biased at 2V to
minimize the crossover dead zone caused by low line
voltage. A 32k resistor is in series with the current input,
so that a small external capacitor can be used to filter out
the switching noise from the high impedance lines.
VA
OUT
(Pin 5): This is the output of the voltage error
amplifier. The output is clamped at 12V. When the output
goes below 1.5V, the multiplier output current is zero.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1249I | 制造商:LINER 制造商全称:Linear Technology 功能描述:Power Factor Controller |
| LT1249IN8 | 功能描述:IC PFC CTRLR AVERAGE CURR 8DIP RoHS:否 类别:集成电路 (IC) >> PMIC - PFC（功率因数修正） 系列:- 产品培训模块:GreenChip Synchronous Rectification Control Family of ICs 标准包装:1 系列:- 模式:间歇导电（DCM） 频率 - 开关:- 电流 - 启动:- 电源电压:8.6 V ~ 38 V 工作温度:-20°C ~ 150°C 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商设备封装:14-SO 包装:Digi-Reel® 其它名称:568-5348-6 |
| LT1249IN8#PBF | 功能描述:IC PFC CTRLR AVERAGE CURR 8DIP RoHS:是 类别:集成电路 (IC) >> PMIC - PFC（功率因数修正） 系列:- 产品培训模块:GreenChip Synchronous Rectification Control Family of ICs 标准包装:1 系列:- 模式:间歇导电（DCM） 频率 - 开关:- 电流 - 启动:- 电源电压:8.6 V ~ 38 V 工作温度:-20°C ~ 150°C 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商设备封装:14-SO 包装:Digi-Reel® 其它名称:568-5348-6 |
| LT1249IS8 | 功能描述:IC PFC CTRLR AVERAGE CURR 8SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - PFC（功率因数修正） 系列:- 产品培训模块:GreenChip Synchronous Rectification Control Family of ICs 标准包装:1 系列:- 模式:间歇导电（DCM） 频率 - 开关:- 电流 - 启动:- 电源电压:8.6 V ~ 38 V 工作温度:-20°C ~ 150°C 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商设备封装:14-SO 包装:Digi-Reel® 其它名称:568-5348-6 |
| LT1249IS8#PBF | 功能描述:IC PFC CTRLR AVERAGE CURR 8SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - PFC（功率因数修正） 系列:- 产品培训模块:GreenChip Synchronous Rectification Control Family of ICs 标准包装:1 系列:- 模式:间歇导电（DCM） 频率 - 开关:- 电流 - 启动:- 电源电压:8.6 V ~ 38 V 工作温度:-20°C ~ 150°C 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商设备封装:14-SO 包装:Digi-Reel® 其它名称:568-5348-6 |
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