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LT1248IS PDF预览

LT1248IS

更新时间: 2024-11-22 22:55:47
品牌 Logo 应用领域
凌特 - Linear 控制器
页数 文件大小 规格书
12页 158K
描述
Power Factor Controller

LT1248IS 技术参数

是否Rohs认证: 不符合生命周期:Transferred
零件包装代码:SOIC包装说明:0.150 INCH, PLASTIC, SOP-16
针数:16Reach Compliance Code:not_compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.09模拟集成电路 - 其他类型:POWER FACTOR CONTROLLER
控制模式:CURRENT-MODE控制技术:PULSE WIDTH MODULATION
最大输入电压:25 V最小输入电压:11.5 V
标称输入电压:18 VJESD-30 代码:R-PDSO-G16
JESD-609代码:e0长度:9.906 mm
湿度敏感等级:1功能数量:1
端子数量:16最高工作温度:125 °C
最低工作温度:-40 °C最大输出电流:1.5 A
标称输出电压:7.5 V封装主体材料:PLASTIC/EPOXY
封装代码:SOP封装等效代码:SOP16,.25
封装形状:RECTANGULAR封装形式:SMALL OUTLINE
峰值回流温度(摄氏度):235认证状态:Not Qualified
座面最大高度:1.752 mm子类别:Switching Regulator or Controllers
最大供电电流 (Isup):12 mA表面贴装:YES
切换器配置:BOOST最大切换频率:300 kHz
技术:BIPOLAR温度等级:AUTOMOTIVE
端子面层:Tin/Lead (Sn/Pb)端子形式:GULL WING
端子节距:1.27 mm端子位置:DUAL
处于峰值回流温度下的最长时间:20宽度:3.899 mm
Base Number Matches:1

LT1248IS 数据手册

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LT1248  
Power Factor Controller  
U
FEATURES  
DESCRIPTIO  
The LT®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.  
High Power Factor Over Wide Load Range  
with Line Current Averaging  
International Operation Without Switches  
Instantaneous Overvoltage Protection  
Minimal Line Current Dead Zone  
Typical 250µA Start-Up Supply Current  
Rejects Line Switching Noise  
Synchronization Capability  
Low Quiescent Current: 9mA  
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.  
Fast 1.5A Peak Current Gate Driver  
U
APPLICATIO S  
Universal Power Factor Corrected Power Supplies  
Preregulators Up To 1500W  
The LT1248 provides many protection features including  
peak current limiting and overvoltage protection, and can  
be operated at frequencies as high as 300kHz.  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
W
BLOCK DIAGRA  
CA  
M
I
GND  
1
V
CC  
15  
V
PK  
LIM  
VA  
OUT  
3
OUT SENSE  
REF  
9
OUT  
4
5
2
7
+
7.5V  
REF  
+
V
V
CC  
16V TO 10V  
RUN  
2.6V/  
+
2.2V  
7.5V  
EN/SYNC  
10  
7µA  
2.2V  
+
M1  
V
SENSE  
11  
I
I
A
+
EA  
I
M
I
2 I  
B
CA  
+
A
I
AC  
I
M
=
32k  
200µA2  
B
R
R
+
6
Q
+
7.9V  
OVP  
8
S
+
RUN  
16  
0.7V  
SYNC  
GTDR  
+
ONE SHOT  
200ns  
OSC  
12µA  
5V  
SS  
13  
1 6V  
14  
12  
1248 BD  
C
SET  
R
SET  
1

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