UCC3884 频率折回电流模式 PWM 控制器

UCC3884
Topology Boost, Buck, Flyback, Forward  
Control Method Current Mode  
Duty Cycle(Max)(%) 78  
Frequency(Max)(kHz) 750  
UVLO Thresholds On/Off(V) 9.1/8.8  
Pin/Package 16PDIP, 16SOIC  
Regulated Outputs(#) 1  
Operating Temperature Range(°C) 0 to 70  
Rating Catalog 
UCC3884 描述

The UCC3884 is a high performance current mode PWM controller intendedfor single ended switch mode power supplies. The chip implements a frequency foldback scheme that decreases the oscillator frequency as the output voltage falls below a programmed value. This technique decreases the average output current sourced into a low impedance load which can occur during an output short circuit or overload condition. Excessive short circuit current is more prevalent in high frequency converters where the propagation delay and switch turn-off time forces a minimum attainable duty cycle. An accurate volt-second clamp limits the duty cycle during line or load transient conditions which could otherwise saturate the transformer.

UCC3884 特性
UCC3884 芯片订购指南
器件 状态 温度 (oC) 价格(美元) 封装 | 引脚 封装数量 | 封装载体 丝印标记
UCC3884D ACTIVE 0 to 70 2.10 | 1ku SOIC (D) | 16 40 | TUBE UCC3884D
UCC3884DG4 ACTIVE 0 to 70 2.10 | 1ku SOIC (D) | 16 40 | TUBE UCC3884D
UCC3884N ACTIVE 0 to 70 2.10 | 1ku PDIP (N) | 16 25 | TUBE UCC3884N
UCC3884NG4 ACTIVE 0 to 70 2.10 | 1ku PDIP (N) | 16 25 | TUBE UCC3884N
UCC3884 质量与无铅数据
器件 环保计划* 铅/焊球涂层 MSL 等级/回流焊峰 环保信息与无铅 (Pb-free) DPPM / MTBF / FIT 率
UCC3884D Green (RoHS & no Sb/Br)  CU NIPDAU  Level-2-260C-1 YEAR   UCC3884D
UCC3884DG4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-2-260C-1 YEAR UCC3884DG4 UCC3884DG4
UCC3884N Green (RoHS & no Sb/Br)  CU NIPDAU  N/A for Pkg Type   UCC3884N
UCC3884NG4 Green (RoHS & no Sb/Br)  CU NIPDAU  N/A for Pkg Type UCC3884NG4 UCC3884NG4
UCC3884 应用技术支持与电子电路设计开发资源下载
  1. UCC3884 数据资料 dataSheet 下载.PDF
  2. TI 德州仪器AC/DC 和 DC/DC 电源产品选型与价格参考 . xls
  3. Dual MOSFET Driver (PDF  498 KB)
  4. 标准线性产品交叉参考 (Rev. D)   (PDF  1058 KB)
  5. 模数规格和性能特性术语表 (Rev. A) (PDF 1993 KB)
  6. 所选封装材料的热学和电学性质 (PDF 645 KB)
  7. 高速数据转换 (PDF 1967 KB)
  8. Shelf-Life Evaluation of Lead-Free Component Finishes (PDF 1305 KB)
  9. Analog-to-Digital Converter Grounding Practices Affect System Performance (PDF 56 KB)
  10. Principles of Data Acquisition and Conversion (PDF 50 KB)
  11. Interleaving Analog-to-Digital Converters (PDF 64 KB)
  12. What Designers Should Know About Data Converter Drift (PDF 95 KB)
  13. Giving Delta-Sigma Converters a Gain Boost with a Front End Analog Gain Stage (PDF 70 KB)
  14. Programming Tricks for Higher Conversion Speeds Utilizing Delta Sigma Converters (PDF 105 KB)
UCC3884 工具与软件
名称 型号 公司 工具/软件类型
音频的快速搜索选择工具 AUDIO_SELECTION_TOOL Texas Instruments 免费评估工具
UCC3884 评估模块 UCC3884EVM Texas Instruments 开发电路板/EVM
用于音频转换器的软件驱动程序 CODECDRIVERS-SW Texas Instruments  应用软件