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TL2844 电流模式 PWM 控制器

TL2844 描述

The TL284x and TL384x series of control integrated circuits provide the features that are necessary to implement off-line or dc-to-dc fixed-frequency current-mode control schemes, with a minimum number of external components. Some of the internally implemented circuits are an undervoltage lockout (UVLO), featuring a start-up current of less than 1 mA, and a precision reference trimmed for accuracy at the error amplifier input. Other internal circuits include logic to ensure latched operation, a pulse-width modulation (PWM) comparator (that also provides current-limit control), and a totem-pole output stage designed to source or sink high-peak current. The output stage, suitable for driving N-channel MOSFETs, is low when it is in the off state.

TL2842 TL2843 TL2844 TL2845
Topology Boost, Flyback, Forward Boost, Flyback, Forward Boost, Flyback, Forward Boost, Flyback, Forward
Control Method Current Mode Current Mode Current Mode Current Mode
Duty Cycle(Max)(%) 100 100 50 50
Frequency(Max)(kHz) 500 500 500 500
UVLO Thresholds On/Off(V) 16/10 8.4/7.6 16/10 8.4/7.6
Pin/Package 14SOIC, 8PDIP, 8SOIC 14SOIC, 8PDIP, 8SOIC 14SOIC, 8PDIP, 8SOIC 14SOIC, 8PDIP, 8SOIC
Regulated Outputs(#) 1 1 1 1
Operating Temperature Range(°C) -40 to 85 -40 to 85 -40 to 85 -40 to 85
Rating Catalog Catalog Catalog Catalog
TL2844 特性
TL2844 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
TL2844D ACTIVE -40 to 85 0.44 | 1ku SOIC (D) | 14 50 | TUBE TL2844D
TL2844D-8 ACTIVE -40 to 85 0.49 | 1ku SOIC (D) | 8 75 | TUBE TL2844D
TL2844DE4 ACTIVE -40 to 85 0.44 | 1ku SOIC (D) | 14 50 | TUBE TL2844D
TL2844DE4-8 ACTIVE -40 to 85 0.49 | 1ku SOIC (D) | 8 75 | TUBE TL2844D
TL2844DG4 ACTIVE -40 to 85 0.44 | 1ku SOIC (D) | 14 50 | TUBE TL2844D
TL2844DG4-8 ACTIVE -40 to 85 0.49 | 1ku SOIC (D) | 8 75 | TUBE TL2844D
TL2844DR ACTIVE -40 to 85 0.40 | 1ku SOIC (D) | 14 2500 | LARGE T&R TL2844D
TL2844DR-8 ACTIVE -40 to 85 0.40 | 1ku SOIC (D) | 8 2500 | LARGE T&R TL2844D
TL2844DRE4 ACTIVE -40 to 85 0.40 | 1ku SOIC (D) | 14 2500 | LARGE T&R TL2844D
TL2844DRE4-8 ACTIVE -40 to 85 0.40 | 1ku SOIC (D) | 8 2500 | LARGE T&R TL2844D
TL2844DRG4 ACTIVE -40 to 85 0.40 | 1ku SOIC (D) | 14 2500 | LARGE T&R TL2844D
TL2844DRG4-8 ACTIVE -40 to 85 0.40 | 1ku SOIC (D) | 8 2500 | LARGE T&R TL2844D
TL2844P ACTIVE -40 to 85 0.48 | 1ku PDIP (P) | 8 50 | TUBE TL2844P
TL2844PE4 ACTIVE -40 to 85 0.48 | 1ku PDIP (P) | 8 50 | TUBE TL2844P
TL2844 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
TL2844D Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR   TL2844D
TL2844D-8 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR   TL2844D-8
TL2844DE4 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR   TL2844DE4
TL2844DE4-8 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR   TL2844DE4-8
TL2844DG4 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR TL2844DG4 TL2844DG4
TL2844DG4-8 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR   TL2844DG4-8
TL2844DR Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR   TL2844DR
TL2844DR-8 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR   TL2844DR-8
TL2844DRE4 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR   TL2844DRE4
TL2844DRE4-8 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR   TL2844DRE4-8
TL2844DRG4 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR TL2844DRG4 TL2844DRG4
TL2844DRG4-8 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR   TL2844DRG4-8
TL2844P Pb-Free (RoHS) CU NIPDAU N/A for Pkg Type   TL2844P
TL2844PE4 Pb-Free (RoHS) CU NIPDAU N/A for Pkg Type   TL2844PE4
TL2844 应用技术支持与电子电路设计开发资源下载
  1. TL2844 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)
TL2844 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
TL2844 评估模块 TL2844EVM 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