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NCP4305DMTTWG

更新时间： 2024-11-09 00:59:51
品牌 Logo 应用领域
安森美 - ONSEMI /
页数 文件大小 规格书
52页 702K
描述
Secondary Side Synchronous Rectification Driver

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中文翻译

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NCP4305DMTTWG 数据手册

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NCP4305  
Secondary Side  
Synchronous Rectification  
Driver for High Efficiency  
SMPS Topologies  
www.onsemi.com  
The NCP4305 is high performance driver tailored to control a  
synchronous rectification MOSFET in switch mode power supplies.  
Thanks to its high performance drivers and versatility, it can be used in  
various topologies such as DCM or CCM flyback, quasi resonant  
flyback, forward and half bridge resonant LLC.  
The combination of externally adjustable minimum off-time and  
on-time blanking periods helps to fight the ringing induced by the PCB  
layout and other parasitic elements. A reliable and noise less operation  
of the SR system is insured due to the Self Synchronization feature. The  
NCP4305 also utilizes Kelvin connection of the driver to the MOSFET  
to achieve high efficiency operation at full load and utilizes a light load  
detection architecture to achieve high efficiency at light load.  
The precise turn−off threshold, extremely low turn−off delay time  
and high sink current capability of the driver allow the maximum  
synchronous rectification MOSFET conduction time and enables  
maximum SMPS efficiency. The high accuracy driver and 5 V gate  
clamp enables the use of GaN FETs.  
MARKING  
DIAGRAMS  
8
8
NCP4305x  
ALYW G  
G
1
SOIC−8  
D SUFFIX  
CASE 751  
1
1
4305x  
ALYWG  
G
DFN8  
MN SUFFIX  
CASE 488AF  
1
Features  
5xMG  
WDFN8  
MT SUFFIX  
CASE 511AT  
G
• Self−Contained Control of Synchronous Rectifier in CCM, DCM and  
QR for Flyback, Forward or LLC Applications  
• Precise True Secondary Zero Current Detection  
• Typically 12 ns Turn off Delay from Current Sense Input to Driver  
4305x = Specific Device Code  
x = A, B, C, D or Q  
• Rugged Current Sense Pin (up to 200 V)  
A
L
Y
W
M
G
= Assembly Location  
= Wafer Lot  
• Ultrafast Turn−off Trigger Interface/Disable Input (7.5 ns)  
• Adjustable Minimum ON−Time  
= Year  
= Work Week  
= Date Code  
• Adjustable Minimum OFF-Time with Ringing Detection  
= Pb−Free Package  
• Adjustable Maximum ON−Time for CCM Controlling of Primary  
(Note: Microdot may be in either location)  
QR Controller  
• Improved Robust Self Synchronization Capability  
• 8 A / 4 A Peak Current Sink / Source Drive Capability  
ORDERING INFORMATION  
See detailed ordering and shipping information on page 49 of  
this data sheet.  
• Operating Voltage Range up to V = 35 V  
CC  
• Automatic Light−load & Disable Mode  
• Adaptive Gate Drive Clamp  
• GaN Transistor Driving Capability (options A and C)  
• Low Startup and Disable Current Consumption  
• Maximum Operation Frequency up to 1 MHz  
• SOIC-8 and DFN−8 (4x4) and WDFN8 (2x2) Packages  
• These are Pb−Free Devices  
Typical Applications  
• Notebook Adapters  
• High Power Density AC/DC Power Supplies (Cell  
Phone Chargers)  
• LCD TVs  
• All SMPS with High Efficiency Requirements  
© Semiconductor Components Industries, LLC, 2015  
1
Publication Order Number:  
June, 2015 − Rev. 1  
NCP4305/D  
1234567...52

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