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UCC2894 电流模式有源钳位 PWM 控制器

UCC2894 描述

The UCC2891/2/3/4 family of PWM controllers is designed to simplify implementation of the various active clamp/reset switching power topologies.

The UCC289x is a peak current-mode, fixedfrequency, high-performance pulse width modulator. It includes the logic and the drive capability for the auxiliary switch with a simple method of programming the critical delays for proper active clamp operation.

The UCC2891/3 includes a 110-V start-up regulator for initial start-up and to provide keep-alive power during stand-by.

Additional features include an internal programmable slope compensation circuit, precise DMAX limit, and a single resistor programmable synchronizable oscillator. An accurate line monitoring function also programs the converter\x92s ON and OFF transitions with regard to the bulk input voltage.

UCC2891 UCC2892 UCC2893 UC2894
Topology Flyback, Forward Flyback, Forward Flyback, Forward Flyback, Forward
Control Method Current Mode Current Mode Current Mode Current Mode
Frequency(Max)(kHz) 1000 1000 1000 1000
UVLO Thresholds On/Off(V) 13.0/8.0 13.0/8.0 13.0/8.0 13.0/8.0
Pin/Package 16SOIC, 16TSSOP 16SOIC, 16TSSOP 16SOIC, 16TSSOP 16SOIC, 16TSSOP
Regulated Outputs(#) 1 1 1 1
Operating Temperature Range(°C) -40 to 85 -40 to 105,-40 to 85 -40 to 105,-40 to 85 -40 to 85
Rating Catalog Catalog Catalog Catalog
UCC2894 特性
UCC2894 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
UCC2894D ACTIVE -40 to 85 1.55 | 1ku SOIC (D) | 16 40 | TUBE UCC2894
UCC2894DG4 ACTIVE -40 to 85 1.55 | 1ku SOIC (D) | 16 40 | TUBE UCC2894
UCC2894DR ACTIVE -40 to 85 1.20 | 1ku SOIC (D) | 16 2500 | LARGE T&R UCC2894
UCC2894DRG4 ACTIVE -40 to 85 1.20 | 1ku SOIC (D) | 16 2500 | LARGE T&R UCC2894
UCC2894PW ACTIVE -40 to 85 1.30 | 1ku TSSOP (PW) | 16 90 | TUBE UCC2894
UCC2894PWG4 ACTIVE -40 to 85 1.30 | 1ku TSSOP (PW) | 16 90 | TUBE UCC2894
UCC2894PWR ACTIVE -40 to 85 1.20 | 1ku TSSOP (PW) | 16 2000 | LARGE T&R UCC2894
UCC2894PWRG4 ACTIVE -40 to 85 1.20 | 1ku TSSOP (PW) | 16 2000 | LARGE T&R UCC2894
UCC2894 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
UCC2894D Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM   UCC2894D
UCC2894DG4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM UCC2894DG4 UCC2894DG4
UCC2894DR Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM   UCC2894DR
UCC2894DRG4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM UCC2894DRG4 UCC2894DRG4
UCC2894PW Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM   UCC2894PW
UCC2894PWG4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM UCC2894PWG4 UCC2894PWG4
UCC2894PWR Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM   UCC2894PWR
UCC2894PWRG4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM UCC2894PWRG4 UCC2894PWRG4
UCC2894 应用技术支持与电子电路设计开发资源下载
  1. UCC2894 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)
UCC2894 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
UCC2894 评估模块 UCC2894EVM 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