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NCP1351: Controller, Variable Off-Time Current Mode, with Short Circuit Protection

Overview
Specifications
Packages
Datasheet: Variable Off Time PWM Controller
Rev. 3 (526.0kB)
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Product Overview
产品说明
The NCP1351 is a current mode controller targeting low power off line flyback Switched Mode Power Supplies (SMPS) where cost is of utmost importance. Based on a fixed peak current technique (quasi fixed TON), the controller decreases its switching frequency as the load becomes lighter. As a result, a power supply using the NCP1351 naturally offers excellent no load power consumption, while optimizing the efficiency in other loading conditions. When the frequency decreases, the peak current is gradually reduced down to approximately 30% of the maximum peak current to prevent transformer mechanical resonance. The risk of acoustic noise is thus greatly diminished while keeping good standby power performance.
An externally adjustable timer permanently monitors the feedback activity and protects the supply in presence of a short circuit or an overload. Once the timer elapses, NCP1351 stops switching and stays latched for version A, and tries to restart for Version B.
The internal structure features an optimized arrangement which allows one of the lowest available startup current, a fundamental parameter when designing low standby power supplies. The negative current sensing technique minimizes the impact of the switching noise on the controller operation and offers the user to select the maximum peak voltage across his current sense resistor. Its power dissipation can thus be application optimized.
Finally, the bulk input ripple ensures a natural frequency smearing which smooths the EMI signature.
特性   优势
     
  • Quasi fixed TON, Variable TOFF Current Mode Control
 
  • Natural frequency foldback
  • Frequency foldback with Peak Current Compression
 
  • Noise free & improved efficiency in light load
  • Short circuit protection (latched A version or auto restart B version)
 
  • Independent of the auxiliary Winding
  • Primary or secondary side regulation
   
  • Dedicated Latch Input for OTP, OVP
   
  • Low start-up current
   
  • Natural frequency jittering
   
  • Negative current sensing with programmable current sense resistor
   
应用   终端产品
  • Auxiliary Power Supply
  • Off-line battery chargers
 
  • Printers
  • Adapters
技术文档及设计资源
设计和开发工具 (1) 数据表 (1)
参考设计 (2) 封装图纸 (2)
设计注释 (1) 视频 (3)
应用注释 (6) 评估板文档 (15)
仿真模型 (2)  
评估/开发工具信息
产品 状况 Compliance 简短说明 行动
NCP1351ADAPGEVB Active
Pb-free
57 W Adapter Evaluation Board
NCP1351LEDGEVB Active
Pb-free
20 W Constant Current LED Driver Evaluation Board
NCP1351PRINTGEVB Active
Pb-free
40 W Printer Evaluation Board
Avnet (2015-07-09) : 4
Digikey (2015-07-09) : 2
Avnet (2015-07-09) : 2
Mouser (2015-07-09) : 1
Digikey (2015-07-09) : 2
Avnet (2015-07-09) : 2
Digikey (2015-07-09) : 2
供货情况和样品
产品
状况
Compliance
具体说明
封装
MSL*
容器
预算价格 (1千个数量的单价)
类型
外形
类型
数量
NCP1351ADR2G Active
Pb-free
Halide free
Controller, Variable Off-Time Current Mode, with Short Circuit Protection SOIC-8 751-07 1 Tape and Reel 2500 $0.32
NCP1351APG Last Shipments 
Pb-free
Halide free
Controller, Variable Off-Time Current Mode, with Short Circuit Protection PDIP-8 626-05 NA Tube 50  
NCP1351BDR2G Active
Pb-free
Halide free
Controller, Variable Off-Time Current Mode, with Short Circuit Protection SOIC-8 751-07 1 Tape and Reel 2500 $0.32
NCP1351BPG Last Shipments 
Pb-free
Halide free
Controller, Variable Off-Time Current Mode, with Short Circuit Protection PDIP-8 626-05 NA Tube 50  
NCP1351CDR2G Active
Pb-free
Halide free
Controller, Variable Off-Time Current Mode, with Short Circuit Protection SOIC-8 751-07 1 Tape and Reel 2500 $0.32
NCP1351CPG Last Shipments 
Pb-free
Halide free
Controller, Variable Off-Time Current Mode, with Short Circuit Protection PDIP-8 626-05 NA Tube 50  
NCP1351DDR2G Active
Pb-free
Halide free
Controller, Variable Off-Time Current Mode, with Short Circuit Protection SOIC-8 751-07 1 Tape and Reel 2500 $0.32
NCP1351DPG Last Shipments 
Pb-free
Halide free
Controller, Variable Off-Time Current Mode, with Short Circuit Protection PDIP-8 626-05 NA Tube 50  
表面贴装器件的潮湿敏感度等级(MSL)(260°C回流温度时测量无铅,235°C回流温度时测量含铅)
市场订货至交货的时间(周) : 8 to 12
Mouser   (2015-07-09) : >1K
PandS   (2015-07-09) : <1K
市场订货至交货的时间(周) : Contact Factory
Chip1Stop   (2015-07-09) : <1K
PandS   (2015-07-09) : <100
市场订货至交货的时间(周) : 13 to 16
Digikey   (2015-07-09) : >1K
Mouser   (2015-07-09) : >10K
PandS   (2015-07-09) : <1K
市场订货至交货的时间(周) : Contact Factory
PandS   (2015-07-09) : <100
市场订货至交货的时间(周) : 2 to 4
ON Semiconductor   (2015-07-08) : 10,000
PandS   (2015-07-09) : >1K
市场订货至交货的时间(周) : Contact Factory
PandS   (2015-07-09) : <1K
市场订货至交货的时间(周) : 4 to 8
PandS   (2015-07-09) : <1K
市场订货至交货的时间(周) : Contact Factory
Datasheet: Variable Off Time PWM Controller
Rev. 3 (526.0kB)
»浏览可靠性数据
»查看材料成分
»产品更改通知 (6)
Product Overview

Product Compliance Status Description Topology Control Mode fsw Typ (kHz) Stand-by Mode UVLO (V) Short Circuit Protection Latch Soft Start VCC Max (V) Drive Cap. (mA) Package Type
 Pb-free 
 Halide free 
 Active     Controller, Variable Off-Time Current Mode, with Short Circuit Protection   Flyback   Current Mode   Variable   No   Yes   Yes   Yes   No   28   400 / 400   SOIC-8 
 Pb-free 
 Halide free 
 Active     Controller, Variable Off-Time Current Mode, with Short Circuit Protection   Flyback   Current Mode   Variable   No   Yes   Yes   Yes   No   28   400 / 400   SOIC-8 
 Pb-free 
 Halide free 
 Active     Controller, Variable Off-Time Current Mode, with Short Circuit Protection   Flyback   Current Mode   Variable   No   Yes   Yes   Yes   No   28   400 / 400   SOIC-8 
 Pb-free 
 Halide free 
 Active     Controller, Variable Off-Time Current Mode, with Short Circuit Protection   Flyback   Current Mode   Variable   No   Yes   Yes   Yes   No   28   400 / 400   SOIC-8 
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