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NCP1380

更新时间： 2024-11-29 05:52:03
品牌 Logo 应用领域
安森美 - ONSEMI 控制器
页数 文件大小 规格书
26页 407K
描述
Quasi-Resonant Current-Mode Controller for High-Power Universal Off-Line Supplies

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NCP1380  
Quasi-Resonant  
Current-Mode Controller for  
High-Power Universal  
Off-Line Supplies  
http://onsemi.com  
The NCP1380 hosts a high−performance circuitry aimed to  
powering quasi−resonant converters. Capitalizing on a proprietary  
valley−lockout system, the controller shifts gears and reduces the  
switching frequency as the power loading becomes lighter. This  
results in a stable operation despite switching events always occurring  
QUASI−RESONANT PWM  
CONTROLLER FOR HIGH  
POWER AC−DC WALL  
ADAPTERS  
th  
in the drain−source valley. This system works down to the 4 valley  
and toggles to a variable frequency mode beyond, ensuring an  
excellent standby power performance.  
MARKING  
To improve the safety in overload situations, the controller includes  
an Over Power Protection (OPP) circuit which clamps the delivered  
power at high−line. Safety−wise, a fixed internal timer relies on the  
feedback voltage to detect a fault. Once the timer elapses, the  
controller stops and stays latched for option A and C or enters  
auto−recovery mode for option B and D.  
DIAGRAMS  
8
SOIC−8  
D SUFFIX  
CASE 751  
1380X  
ALYWX  
G
8
1
1
Particularly well suited for adapter applications, the controller  
features a pin to implement either a combined overvoltage /  
overtemperature protection (Version A and B) or a combined  
brown−out/overvoltage protection (Version C and D).  
1380X = Specific Device Code  
X
A
L
= Device Option (A, B, C, or D)  
= Assembly Location  
= Wafer Lot  
Y
W
G
= Year  
= Work Week  
= Pb−Free Package  
Features  
• Quasi−Resonant Peak Current−Mode Control Operation  
• Valley Switching Operation with Valley−Lockout for Noise−Immune  
Operation  
• Frequency Foldback at Light Load to Improve the Light Load  
Efficiency  
PIN CONNECTIONS  
ZCD 1  
8 CT  
• Adjustable Over Power Protection  
• Auto−Recovery or Latched Internal Output Short−Circuit Protection  
2
3
4
FAULT  
VCC  
FB  
CS  
7
6
5
• Fixed Internal 80 ms Timer for Short−Circuit Protection  
• Combined Overvoltage and Overtemperature Protection (A and B  
Versions)  
DRV  
GND  
• Combined Overvoltage Protection and Brown−Out (C and D  
Versions)  
• +500 mA / −800 mA Peak Current Source/Sink Capability  
• Internal Temperature Shutdown  
ORDERING INFORMATION  
See detailed ordering and shipping information in the package  
dimensions section on page 25 of this data sheet.  
• Direct Optocoupler Connection  
• Extended V Range Operation Up to 28 V  
CC  
• Extremely Low No−Load Standby Power  
• SO−8 Package  
• These Devices are Pb−Free and are RoHS Compliant  
Typical Applications  
• High Power ac−dc Converters for TVs, Set−Top Boxes etc.  
• Offline Adapters for Notebooks  
© Semiconductor Components Industries, LLC, 2009  
1
Publication Order Number:  
December, 2009 − Rev. 1  
NCP1380/D  
1234567...26

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