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NTMSD3P303 PDF预览

NTMSD3P303

更新时间： 2024-02-21 16:59:42
品牌 Logo 应用领域
安森美 - ONSEMI /
页数 文件大小 规格书
2页 270K
描述
Typical Uses for FETKY Devices

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NTMSD3P303 数据手册

 浏览型号NTMSD3P303的Datasheet PDF文件第2页 
Protection Circuit  
Typical Uses for FETKY® Devices  
(MOSFET + Schottky Co-packaged)  
The Schottky diode actually provides a by-pass channel and keeps  
reverse voltage across the MOSFET to less than a P-N diode drop.  
Introduction  
FETKY  
In consumer electronic circuits, Schottky diodes are often seen  
working with power MOSFETs to implement system level power  
solutions. There are different reasons for integrating a Schottky  
diode with a MOSFET. Typical examples of these circuits include  
reverse protection, asynchronous DC/DC conversion, free-wheeling  
rectification, switching efficiency improvement, and more.  
D1  
Vin  
Vout  
Q1  
C1  
C2  
R1  
ON/OFF  
Examples  
GND  
GND  
DC-DC Buck Circuit  
Protection Circuit  
A MOSFET plus a Schottky diode is the most typical buck converter  
circuit seen throughout the portable electronics market. The Schottky  
diode is used as a rectifying element closing the current loop after the  
main switch turns off.  
Switching Efficiency Improvement  
A Schottky diode can be placed in parallel with the synchronous  
rectifying MOSFET to improve efficiency. It conducts during the dead-  
time between the on/off cycle of the two power MOSFETs preventing  
the body diode of the bottom MOSFET from turning on and storing  
charge during the dead-time. This approach can improve efficiency  
as much as 2%.  
FETKY  
L1  
Vin  
Vout  
L1  
C1  
D1  
C2  
Vin  
Vout  
Q1  
ON/OFF  
FETKY  
GND  
GND  
Q1  
DC-DC Buck Circuit  
D1  
C1  
C2  
Li-Ion Charging Circuit  
The FETKY device can be used as charging elements for multiple  
power sources such as car battery charger, wall charger, or USB  
connection. A Schottky is preferred over a standard diode because  
GND  
GND  
Switching Circuit  
of the lower V rating resulting in minimum power consumption during  
f
normal operations.  
Portfolio  
FETKY  
Please see our lastest portfolio of FETKY devices on the reverse side of  
this card. For additional information on our FETKY, and other MOSFET  
portfolio devices, please visit our website at www.onsemi.com.  
D1  
Vin  
Vout  
ON/OFF  
Q1  
C1  
C2  
R1  
GND  
GND  
Li-Ion Charging Circuit  
FETKY is a registered trademark of International Rectifier.  
12

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