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UC3844A 电流模式 PWM 控制器

UC3844A 描述

The UC1842A/3A/4A/5A family of control ICs is a pin for pin compatible improved version of the UC3842/3/4/5 family. Providing the necessary features to control current mode switched mode power supplies, this family has the following improved features. Start up current is guaranteed to be less than 0.5mA. Oscillator discharge is trimmed to 8.3mA. During under voltage lockout, the output stage can sink at least 10mA at less than 1.2V for VCC over 5V.

  UC1844A UC2844A UC3844A
Topology Boost, Flyback, Forward   Boost, Buck, Flyback, Forward   Boost, Buck, Flyback, Forward  
Control Method Current Mode   Current Mode   Current Mode  
Duty Cycle(Max)(%) 50   50   50  
Frequency(Max)(kHz) 450   450   450  
UVLO Thresholds On/Off(V) 16/10   16/10   16/10  
Pin/Package 20LCCC, 8CDIP   14SOIC, 8PDIP, 8SOIC   14SOIC, 8PDIP, 8SOIC  
Regulated Outputs(#) 1   1   1  
Operating Temperature Range(°C) -55 to 125   -40 to 125,-40 to 85   0 to 70  
Rating Military   Catalog   Catalog
UC3844A 特性
UC3844A 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
UC3844AD ACTIVE 0 to 70 0.90 | 1ku SOIC (D) | 14 50 | TUBE UC3844AD
UC3844AD8 ACTIVE 0 to 70 0.90 | 1ku SOIC (D) | 8 75 | TUBE UC3844AD
UC3844AD8G4 ACTIVE 0 to 70 0.90 | 1ku SOIC (D) | 8 75 | TUBE UC3844AD
UC3844AD8TR ACTIVE 0 to 70 0.90 | 1ku SOIC (D) | 8 2500 | LARGE T&R UC3844AD
UC3844AD8TRG4 ACTIVE 0 to 70 0.90 | 1ku SOIC (D) | 8 2500 | LARGE T&R UC3844AD
UC3844ADG4 ACTIVE 0 to 70 0.90 | 1ku SOIC (D) | 14 50 | TUBE UC3844AD
UC3844ADTR ACTIVE 0 to 70 0.90 | 1ku SOIC (D) | 14 2500 | LARGE T&R UC3844AD
UC3844ADTRG4 ACTIVE 0 to 70 0.90 | 1ku SOIC (D) | 14 2500 | LARGE T&R UC3844AD
UC3844AN ACTIVE 0 to 70 0.90 | 1ku PDIP (P) | 8 50 | TUBE UC3844AN
UC3844ANG4 ACTIVE 0 to 70 0.90 | 1ku PDIP (P) | 8 50 | TUBE UC3844AN
UC3844AP OBSOLETE 0 to 70   PDIP (P) | 8   UC3844AP
UC3844A 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
UC3844AD Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM   UC3844AD
UC3844AD8 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM   UC3844AD8
UC3844AD8G4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM UC3844AD8G4 UC3844AD8G4
UC3844AD8TR Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM   UC3844AD8TR
UC3844AD8TRG4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM UC3844AD8TRG4 UC3844AD8TRG4
UC3844ADG4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM UC3844ADG4 UC3844ADG4
UC3844ADTR Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM   UC3844ADTR
UC3844ADTRG4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM UC3844ADTRG4 UC3844ADTRG4
UC3844AN Green (RoHS & no Sb/Br)  CU NIPDAU  N/A for Pkg Type   UC3844AN
UC3844ANG4 Green (RoHS & no Sb/Br)  CU NIPDAU  N/A for Pkg Type UC3844ANG4 UC3844ANG4
UC3844A 应用技术支持与电子电路设计开发资源下载
  1. UC3844A 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)
UC3844A 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
UC3844A 评估模块 UC3844AEVM 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