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LT1509ISW#TR PDF预览

LT1509ISW#TR

更新时间: 2024-01-21 21:03:52
品牌 Logo 应用领域
凌特 - Linear 控制器
页数 文件大小 规格书
16页 351K
描述
LT1509 - Power Factor and PWM Controller; Package: SO; Pins: 20; Temperature Range: -40°C to 85°C

LT1509ISW#TR 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:SOP,
针数:20Reach Compliance Code:not_compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.14Is Samacsys:N
模拟集成电路 - 其他类型:POWER FACTOR CONTROLLER WITH POST REGULATOR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 VJESD-30 代码:R-PDSO-G20
JESD-609代码:e0长度:12.8 mm
湿度敏感等级:1功能数量:1
端子数量:20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封装形状:RECTANGULAR
封装形式:SMALL OUTLINE峰值回流温度(摄氏度):255
认证状态:Not Qualified座面最大高度:2.65 mm
最大供电电流 (Isup):19 mA表面贴装:YES
切换器配置:PUSH-PULL最大切换频率:300 kHz
技术:BIPOLAR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:40
宽度:7.5 mmBase Number Matches:1

LT1509ISW#TR 数据手册

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LT1509  
Power Factor and  
PWM Controller  
U
DESCRIPTION  
FEATURES  
PFC and PWM Single Chip Solution  
The LT®1509 is a complete solution for universal off-line  
switching power supplies utilizing active power factor  
correction. The PFC section is identical to the LT1248 PFC  
controller except the EN/SYNC pin is removed because  
PFC and PWM are synchronized internally.  
Synchronized Operation up to 300kHz  
99% Power Factor over 20:1 Load Current Range  
Current Mode PWM  
Instantaneous Overvoltage Protection  
Dedicated Overvoltage Protection (OVP Pin)  
The current mode PWM section (the LT1508 is the volt-  
age-mode counterpart) contains all the primary side func-  
tions to convert the PFC preregulated high voltage output  
to an isolated low voltage output. The PWM duty cycle is  
internally limited to 47% (maximum 50%) to prevent  
transformer saturation. PWM soft start begins when PFC  
output reaches the preset voltage. In the event of brief line  
loss, thePWMwillbeshutoffwhenthePFCoutputvoltage  
drops below 73% of the preset value.  
Minimal Line Current Dead Zone  
Typical 250µA Start-Up Supply Current  
Line Switching Noise Filter  
Low Quiescent Current: 13mA  
Fast 2A Peak Current Gate Drivers  
Separate Soft Start Controls  
U
APPLICATIONS  
Universal Power Factor Corrected Power Supplies  
and Preregulators  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
W
BLOCK DIAGRAM  
VA  
OUT  
V
REF  
12  
M
I
CA  
OUT  
6
GND1  
3
PK  
V
OUT SENSE  
LIM CC  
7.5V  
REF  
10  
8
7
5
17  
V
V
+
CC  
RUN  
7µA  
16V TO 10V  
2.2V  
+
M1  
V
SENSE  
14  
+
+
+
I
A
I
M
CA  
EA  
2
I
I
B
R
R
S
A
7.5V  
7.9V  
I
M
=
25k  
I
AC  
9
2
200µA  
Q
I
B
GTDR1  
1
RUN  
+
+
+
0.7V  
OVP  
11  
OSC  
16V  
GND2  
2
14µA  
SS1  
16  
15  
4
R
SET  
+
C
SET  
+
CL  
1V  
55%  
DELAY  
+
1.2V  
R
S
R
+
7V to  
4.7V  
14µA  
+
PWM0K  
Q
SS2  
13  
GTDR2  
20  
50µA  
200ns  
BLANKING  
19  
RAMP  
18  
16V  
V
C
NOTE: PWM PULSE IS DELAYED BY 55% DUTY CYCLE AFTER PFC PULSE  
1500 • BD01  
1

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