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NCP1343FNAAABCD1R2G

更新时间： 2024-11-29 02:52:07
品牌 Logo 应用领域
安森美 - ONSEMI /
页数 文件大小 规格书
42页 705K
描述
High Frequency Quasi- Resonant Flyback Controller

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NCP1343FNAAABCD1R2G 数据手册

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High Frequency Quasi-  
Resonant Flyback Controller  
NCP1343  
The NCP1343 is a highly integrated quasi−resonant flyback  
controller suitable for designing high−performance off−line power  
converters.  
www.onsemi.com  
The NCP1343 features a proprietary valley−lockout circuitry,  
th  
ensuring stable valley switching. This system works down to the 6  
valley and transitions to frequency foldback mode to reduce switching  
losses. As the load decreases further, the NCP1343 enters quiet−skip  
mode to manage the power delivery while minimizing acoustic noise.  
Additionally, the NCP1343 integrates power excursion mode  
(PEM) to minimize transformer size in designs requiring high  
transient load capability. If transient load capability is not desired, the  
NCP1342 offers the same performance and features without PEM.  
To ensure light load performance with high frequency designs, the  
NCP1343 incorporates Rapid Frequency Foldback with Minimum  
Peak Current Modulation to reduce the switching frequency quickly.  
To help ensure converter ruggedness, the NCP1343 implements  
several key protective features such as internal brownout detection, a  
non−dissipative Over Power Protection (OPP) for constant maximum  
output power regardless of input voltage, and a latched overvoltage  
and NTC−ready overtemperature protection through a dedicated pin.  
8
9
1
1
SOIC−9 NB  
D SUFFIX  
CASE 751BP  
SOIC−8 NB  
D SUFFIX  
CASE 751  
MARKING DIAGRAMS  
8
9
1
343abcdef  
ALYWg  
G
343abcdef  
ALYWg  
G
1
Features  
343abcdef = Specific Device Code  
• Integrated High−Voltage Startup Circuit with Brownout Detection  
A
L
= Assembly Location  
= Wafer Lot  
• Wide V Range from 9 V to 28 V  
CC  
Y
W
g
G
= Year  
= Work Week  
= Additional Options Code  
= Pb−Free Package  
• 28 V V Overvoltage Protection  
CC  
• Abnormal Overcurrent Fault Protection for Winding Short Circuit or  
Saturation Detection  
• Internal Temperature Shutdown  
• Valley Switching Operation with Valley−Lockout for Noise−Free  
Operation  
• Frequency Foldback with 25 kHz Minimum Frequency Clamp for  
Increased Efficiency at Light Loads  
• Rapid Frequency Foldback for Fast Reduction of Switching  
Frequency at Light Loads  
PIN CONNECTIONS  
1
Fault  
HV  
FMAX  
FB  
ZCD/OPP  
CS  
VCC  
DRV  
GND  
• Skip Mode with Quiet−Skip Technology for Highest Performance  
During Light Loads  
1
HV  
FMAX  
FB  
• Minimized Current Consumption for No Load Power Below 30 mW  
• Frequency Jittering for Reduced EMI Signature  
VCC  
DRV  
GND  
ZCD/OPP  
CS  
• Latching or Auto−Recovery Timer−Based Overload Protection  
• Adjustable Overpower Protection (OPP)  
(Top Views)  
• Adjustable Maximum Frequency Clamp  
ORDERING INFORMATION  
See detailed ordering and shipping information on page 3 of  
this data sheet.  
• CCM Operation During Power Excursion Mode (PEM)  
• Fault Pin for Severe Fault Conditions, NTC Compatible for OTP  
© Semiconductor Components Industries, LLC, 2018  
1
Publication Order Number:  
March, 2021 − Rev. 2  
NCP1343/D  
1234567...42

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