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750312557

更新时间： 2024-11-25 12:40:19
品牌 Logo 应用领域
凌特 - Linear 转换器开关
页数 文件大小 规格书
24页 313K
描述
100VIN Micropower Isolated Flyback Converter with 150V/260mA Switch

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中文翻译

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750312557 数据手册

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LT8300  
100V Micropower Isolated  
IN  
Flyback Converter with  
150V/260mA Switch  
DescripTion  
FeaTures  
TheLT®8300isamicropowerhighvoltageisolatedflyback  
converter. By sampling the isolated output voltage directly  
from the primary-side flyback waveform, the part requires  
nothirdwindingoropto-isolatorforregulation.Theoutput  
voltage is programmed with a single external resistor. In-  
ternalcompensationandsoft-startfurtherreduceexternal  
component count. Boundary mode operation provides a  
small magnetic solution with excellent load regulation.  
LowrippleBurstModeoperationmaintainshighefficiency  
at light load while minimizing the output voltage ripple.  
A 260mA, 150V DMOS power switch is integrated along  
withallhighvoltagecircuitryandcontrollogicintoa5-lead  
ThinSOT™ package.  
n
6V to 100V Input Voltage Range  
n
260mA, 150V Internal DMOS Power Switch  
n
Low Quiescent Current:  
70µA in Sleep Mode  
330µA in Active Mode  
n
Boundary Mode Operation at Heavy Load  
Low-Ripple Burst Mode® Operation at Light Load  
Minimum Load <0.5% (Typ) of Full Output  
n
n
n
V
Set with a Single External Resistor  
OUT  
n
No Transformer Third Winding or Opto-Isolator  
Required for Regulation  
n
n
n
Accurate EN/UVLO Threshold and Hysteresis  
Internal Compensation and Soft-Start  
5-Lead TSOT-23 Package  
The LT8300 operates from an input voltages range of 6V  
to 100V and can deliver up to 2W of isolated output power.  
The high level of integration and the use of boundary  
and low ripple burst modes result in a simple to use, low  
componentcount, andhighefficiencyapplicationsolution  
for isolated power delivery.  
applicaTions  
n
Isolated Telecom, Automotive, Industrial, Medical  
Power Supplies  
n
Isolated Auxiliary/Housekeeping Power Supplies  
L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks  
and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the  
property of their respective owners. Protected by U.S. Patents, including 5438499, 7463497,  
and 7471522.  
Typical applicaTion  
5V Micropower Isolated Flyback Converter  
Efficiency vs Load Current  
100  
+
V
OUT  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
V
V
= 36V  
IN  
IN  
5V  
4:1  
36V TO 72V  
1mA TO 300mA  
•
2.2µF  
300µH  
19µH  
V
IN  
V
IN  
= 48V  
47µF  
1M  
•
V
= 72V  
IN  
LT8300  
EN/UVLO  
–
SW  
V
OUT  
40.2k  
210k  
R
FB  
GND  
8300 TA01a  
0
50  
100  
150  
200  
250  
300  
LOAD CURRENT (mA)  
8300 TA01b  
8300f  
1
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