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| 型号： | LT1248IS#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/12页 |
| 文件大小： | 164K |
| 描述： | IC PFC CTRLR AVERAGE CURR 16SOIC |
| 标准包装： | 50 |
| 模式： | 平均电流 |
| 频率 - 开关： | 300kHz |
| 电流 - 启动： | 250µA |
| 电源电压： | 15.5 V ~ 27 V |
| 工作温度： | -40°C ~ 125°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： | 管件 |
| 产品目录页面： | 1338 (CN2011-ZH PDF) |
1
LT1248
Power Factor Controller
+
+
+
I
M
=
I
A
2
I
B
200礎
2
V
CC
VA
OUT
16V TO 10V
2.6V/
2.2V
7.5V
7.9V
12礎
5V
EA
V
REF
+
+
+
+
2.2V
32k
I
A
I
B
7礎
I
M
7.5V
V
REF
+
0.7V
ONE SHOT
200ns
OSC
R
R
S
Q
C
SET
R
SET
13
6
11
8
10
7
9
5
4
3
2
1
15
16
12
14
SS
OVP
I
AC
V
SENSE
EN/SYNC
M
OUT
I
SENSE
CA
OUT
PK
LIM
V
CC
RUN
CA
RUN
1 6V
GND
+
GTDR
1248 BD
SYNC
M1
The LT
?/DIV>
1248 provides active power factor correction for
universal off-line power systems. By using fixed high
frequency PWM current averaging, without the need for
slope compensation, the LT1248 achieves far lower line
current distortion with a smaller magnetic element than
systems that use either peak-current detection or zero
current switching approaches in both continuous and
discontinuous modes of operation.
The LT1248 uses a multiplier containing a square gain
function from the voltage amplifier to reduce the AC gain
at light output load and thus maintains low line current
distortion and high system stability. The LT1248 also
provides filtering capability to reject line switching noise
which can cause instability when fed into the multiplier.
Line current dead zone is minimized with low bias voltage
at the current input to the multiplier.
The LT1248 provides many protection features including
peak current limiting and overvoltage protection, and can
be operated at frequencies as high as 300kHz.
s
High Power Factor Over Wide Load Range
with Line Current Averaging
s
International Operation Without Switches
s
Instantaneous Overvoltage Protection
s
Minimal Line Current Dead Zone
s
Typical 250礎 Start-Up Supply Current
s
Rejects Line Switching Noise
s
Synchronization Capability
s
Low Quiescent Current: 9mA
s
Fast 1.5A Peak Current Gate Driver
s
Universal Power Factor Corrected Power Supplies
s
Preregulators Up To 1500W
, LTC and LT are registered trademarks of Linear Technology Corporation.
FEATURES
DESCRIPTIO
APPLICATIO S
BLOCK DIAGRA
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1249 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Power Factor Controller |
| LT1249_01 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Power Factor Controller |
| LT1249C | 制造商:LINER 制造商全称:Linear Technology 功能描述:Power Factor Controller |
| LT1249CN8 | 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 |
| LT1249CN8#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 |
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