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NCP1341_17

更新时间： 2024-09-20 01:00:47
品牌 Logo 应用领域
安森美 - ONSEMI /
页数 文件大小 规格书
41页 1158K
描述
High-Voltage, Quasi-Resonant, Controller Featuring Valley Lock-Out Switching

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NCP1341_17 数据手册

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NCP1341  
High-Voltage,  
Quasi-Resonant, Controller  
Featuring Valley Lock-Out  
Switching  
www.onsemi.com  
The NCP1341 is a highly integrated quasi−resonant flyback  
controller suitable for designing high−performance off−line power  
converters. With an integrated active X2 capacitor discharge feature,  
the NCP1341 can enable no−load power consumption below 30 mW.  
The NCP1341 features a proprietary valley−lockout circuitry,  
8
9
1
1
th  
ensuring stable valley switching. This system works down to the 6  
SOIC−9 NB  
D SUFFIX  
CASE 751BP  
SOIC−8 NB  
D SUFFIX  
CASE 751  
valley and transitions to frequency foldback mode to reduce switching  
losses. As the load decreases further, the NCP1341 enters quiet−skip  
mode to manage the power delivery while minimizing acoustic noise.  
The NCP1341 integrates power excursion mode (PEM) to minimize  
transformer size in designs requiring high transient load capability. If  
transient load capability is not desired, the NCP1340 offers the same  
performance and features without PEM.  
To help ensure converter ruggedness, the NCP1341 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, a latched overvoltage and  
NTC−ready overtemperature protection through a dedicated pin, and  
line removal detection to safely discharge the X2 capacitors when the  
ac line is removed.  
MARKING DIAGRAM  
9
1341xz  
ALYW  
G
1
1341xz = Specific Device Code  
x
z
A
L
= A or B  
= 1, 2, 3 or 4  
= Assembly Location  
= Wafer Lot  
Features  
Y
W
G
= Year  
= Work Week  
= Pb−Free Package  
• Integrated High−Voltage Startup Circuit with Brownout Detection  
• Integrated X2 Capacitor Discharge Capability  
• Wide V Range from 9 V to 28 V  
CC  
• 28 V V Overvoltage Protection  
CC  
PIN CONNECTIONS  
• Abnormal Overcurrent Fault Protection for Winding Short Circuit or  
1
Fault  
HV  
Saturation Detection  
FMAX  
FB  
ZCD/OPP  
CS  
• Internal Temperature Shutdown  
• Valley Switching Operation with Valley−Lockout for Noise−Free  
Operation  
VCC  
DRV  
GND  
• Frequency Foldback with 25 kHz Minimum Frequency Clamp for  
Increased Efficiency at Light Loads  
1
HV  
FMAX  
FB  
• Skip Mode with Quiet−Skip Technology for Highest Performance  
During Light Loads  
VCC  
DRV  
GND  
ZCD/OPP  
CS  
• Minimized Current Consumption for No Load Power Below 30 mW  
• Frequency Jittering for Reduced EMI Signature  
• Latching or Auto−Recovery Timer−Based Overload Protection  
• Adjustable Overpower Protection (OPP)  
• Fixed or Adjustable Maximum Frequency Clamp  
• Fault Pin for Severe Fault Conditions, NTC Compatible for OTP  
(9−Pin Version Only)  
(Top Views)  
ORDERING INFORMATION  
See detailed ordering and shipping information on page 2 of  
this data sheet.  
• 4 ms Soft−Start Timer  
© Semiconductor Components Industries, LLC, 2017  
1
Publication Order Number:  
October, 2017 − Rev. 4  
NCP1341/D  
1234567...41

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