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LT3574EMS

更新时间: 2024-01-24 14:54:07
品牌 Logo 应用领域
凌特 - Linear 转换器光电
页数 文件大小 规格书
24页 284K
描述
Isolated Flyback Converter Without an Opto-Coupler

LT3574EMS 技术参数

是否Rohs认证: 符合生命周期:Transferred
零件包装代码:MSOP包装说明:TSSOP, TSSOP16,.19,20
针数:16Reach Compliance Code:compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:3.5模拟集成电路 - 其他类型:SWITCHING REGULATOR
控制模式:CURRENT-MODE最大输入电压:40 V
最小输入电压:3 V标称输入电压:12 V
JESD-30 代码:R-PDSO-G16JESD-609代码:e3
长度:4.039 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:1.1 A封装主体材料:PLASTIC/EPOXY
封装代码:TSSOP封装等效代码:TSSOP16,.19,20
封装形状:RECTANGULAR封装形式:SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
峰值回流温度(摄氏度):260认证状态:Not Qualified
座面最大高度:1.1 mm子类别:Switching Regulator or Controllers
表面贴装:YES切换器配置:SINGLE
最大切换频率:1000 kHz技术:BIPOLAR
温度等级:AUTOMOTIVE端子面层:Matte Tin (Sn)
端子形式:GULL WING端子节距:0.5 mm
端子位置:DUAL处于峰值回流温度下的最长时间:30
宽度:3 mmBase Number Matches:1

LT3574EMS 数据手册

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LT3574  
Isolated Flyback Converter  
Without an Opto-Coupler  
Features  
Description  
The LT®3574 is a monolithic switching regulator specifi-  
cally designed for the isolated flyback topology. No third  
winding or opto-isolator is required for regulation. The  
part senses the isolated output voltage directly from the  
primary side flyback waveform. A 0.65A, 60V NPN power  
switch is integrated along with all control logic into a  
16-lead MSOP package.  
n
3V to 40V Input Voltage Range  
n
0.65A, 60V Integrated NPN Power Switch  
n
Boundary Mode Operation  
n
No Transformer Third Winding or  
Opto-Isolator Required for Regulation  
n
Improved Primary-Side Winding Feedback  
Load Regulation  
n
V
Set with Two External Resistors  
OUT  
The LT3574 operates with input supply voltages from  
3V to 40V, and can deliver output power up to 3W with  
no external power switch. The LT3574 utilizes boundary  
mode operation to provide a small magnetic solution with  
improved load regulation.  
n
BIAS Pin for Internal Bias Supply and Power  
NPN Driver  
Programmable Soft-Start  
n
n
n
Programmable Power Switch Current Limit  
16-Lead MSOP Package  
The output voltage is easily set with two external resistors  
andthetransformerturnsratio.Off-the-shelftransformers  
are available for many applications.  
applications  
n
Industrial, Automotive and Medical Isolated  
Power Supplies  
L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks  
and No R  
and ThinSOT are trademarks of Linear Technology Corporation. All other  
SENSE  
trademarks are the property of their respective owners.  
typical application  
5V Isolated Flyback Converter  
Load Regulation  
V
IN  
B340A  
5.6µH  
+
12V TO 24V  
V
OUT  
1.0  
0.5  
0
10µF  
3:1  
5V  
0.35A  
22µF  
357k  
0.22µF  
2k  
V
IN  
50µH  
SHDN/UVLO  
V
= 24V  
IN  
51.1k  
PMEG6010  
80.6k  
V
OUT  
V
= 12V  
IN  
R
FB  
LT3574  
R
REF  
TC  
6.04k  
R
ILIM  
–0.5  
SS  
SW  
VC  
GND TEST BIAS  
10k  
59k  
1nF  
–1.0  
28.7k  
0
100 200 300 400 500 600 700  
(mA)  
I
4.7µF  
10nF  
OUT  
3574 TA01b  
3574 TA01  
3574f  

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