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NCP1345Q00D1R2G

更新时间： 2024-11-30 11:14:39
品牌 Logo 应用领域
安森美 - ONSEMI 光电二极管
页数 文件大小 规格书
43页 1034K
描述
Highly integrated quasi-resonant flyback controller for off-line USB-PD and USB Type-C power converters.

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NCP1345Q00D1R2G 数据手册

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DATA SHEET  
www.onsemi.com  
High-Voltage  
9
1
Quasi-Resonant Flyback  
Controller With USB-PD  
Optimization  
SOIC−9 NB  
CASE 751BP  
MARKING DIAGRAM  
XXXXX = Specific Device Code  
9
1
A
L
= Assembly Location  
= Wafer Lot  
NCP1345  
The NCP1345 is a highly integrated quasi−resonant flyback  
controller suitable for designing high−performance off−line USB−PD  
XXXXX  
ALYWX  
G
Y
W
G
= Year  
= Work Week  
= Pb−Free Package  
and USB Type−C power converters. The included dual−pin V  
CC  
architecture allows direct connection to the aux winding for simplified  
PIN CONNECTIONS  
V
management with a reduced parts count and increased  
CC  
1
performance.  
Fault  
HV  
The NCP1345 also features a precise, primary side based output  
current limiting circuit to ensure a constant output current limit  
regardless of programmed output voltage, or nameplate output power.  
The quasi−resonant (QR) current−mode flyback stage features  
proprietary valley−lockout circuitry to ensure stable valley switching  
FB  
ZCD/OPP  
CS  
VCCH  
VCCL  
DRV  
GND  
th  
down to the 6 valley, then transitions to frequency foldback mode to  
ORDERING INFORMATION  
See detailed ordering and shipping information on page 4 of  
this data sheet.  
reduce switching losses. As the load decreases further, the NCP1345  
enters skip mode to manage the power delivery.  
To help ensure converter ruggedness, the NCP1345 implements  
several key protective features such as internal brownout detection, a  
maximum output current limit regardless of input voltage, a latched  
over voltage and NTC−ready overtemperature protection through a  
dedicated pin, and line removal detection to safely discharge the X2  
capacitors when the line is removed.  
Features  
• Integrated High−Voltage Startup Circuit with Brownout Detection  
• Integrated X2 Capacitor Discharge Capability  
• Wide V  
Range from 8 V to 38 V  
CCL  
• 150 V V  
Pin for Connection to High−Voltage Aux Winding  
CCH  
• 36.5 V V Overvoltage Protection  
CC  
• Primary Side Based Constant Output Current Limiting  
• Abnormal Overcurrent Fault Protection for Winding Short Circuit  
Detection  
• Internal Temperature Shutdown  
• Valley Switching Operation with Valley−Lockout for Noise−Free  
Operation  
• Rapid Frequency Foldback for Fast Reduction of Switching  
Frequency  
• Skip Mode with Output Voltage Compensation  
• Minimized No Load Power Consumption  
• Frequency Jittering for Reduced EMI Signature  
• Latching or Auto−Recovery Overload Protection  
• Adjustable Overpower Protection  
• Fixed/Adjustable Maximum Frequency Clamp  
• Fault Pin for Severe Fault Conditions, NTC Compatible for OTP  
© Semiconductor Components Industries, LLC, 2021  
1
Publication Order Number:  
January, 2023 − Rev. 3  
NCP1345/D  
1234567...43

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