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TL494 脉冲宽度调制 (Pwm) 控制电路

TL494
Topology Boost, Buck, Flyback, Forward, Full-Bridge, Half-Bridge, Push-Pull
Control Method Voltage Mode
Duty Cycle(Max)(%) 45
Frequency(Max)(kHz) 300
Pin/Package 16PDIP, 16SO, 16SOIC, 16SSOP, 16TSSOP
Regulated Outputs(#) 2
Operating Temperature Range(°C) -40 to 85,0 to 70
Rating Military
TL494 描述

The TL494 incorporates all the functions required in the construction of a pulse-width-modulation (PWM) control circuit on a single chip. Designed primarily for power-supply control, this device offers the flexibility to tailor the power-supply control circuitry to a specific application.

The TL494 contains two error amplifiers, an on-chip adjustable oscillator, a dead-time control (DTC) comparator, a pulse-steering control flip-flop, a 5-V, 5%-precision regulator, and output-control circuits.

The error amplifiers exhibit a common-mode voltage range from –0.3 V to VCC–2 V. The dead-time control comparator has a fixed offset that provides approximately 5% dead time. The on-chip oscillator can be bypassed by terminating RT to the reference output and providing a sawtooth input to CT, or it can drive the common circuits in synchronous multiple-rail power supplies.

TL494 特性
TL494 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
TL494CD ACTIVE 0 to 70 0.25 | 1ku SOIC (DW) | 16 40 | TUBE TL494C
TL494CDBR ACTIVE 0 to 70 0.28 | 1ku SSOP (DB) | 16 2000 | LARGE T&R T494
TL494CDBRE4 ACTIVE 0 to 70 0.28 | 1ku SSOP (DB) | 16 2000 | LARGE T&R T494
TL494CDBRG4 ACTIVE 0 to 70 0.28 | 1ku SSOP (DB) | 16 2000 | LARGE T&R T494
TL494CDE4 ACTIVE 0 to 70 0.25 | 1ku SOIC (DW) | 16 40 | TUBE TL494C
TL494CDG4 ACTIVE 0 to 70 0.25 | 1ku SOIC (DW) | 16 40 | TUBE TL494C
TL494CDR ACTIVE 0 to 70 0.25 | 1ku SOIC (DW) | 16 2500 | LARGE T&R TL494C
TL494CDRE4 ACTIVE 0 to 70 0.25 | 1ku SOIC (DW) | 16 2500 | LARGE T&R TL494C
TL494CDRG3 PREVIEW 0 to 70 SOIC (DW) | 16 2500 TL494C
TL494CDRG4 ACTIVE 0 to 70 0.25 | 1ku SOIC (DW) | 16 2500 | LARGE T&R TL494C
TL494CJ OBSOLETE CDIP (J) | 16 T494
TL494CN ACTIVE 0 to 70 0.30 | 1ku PDIP (N) | 16 25 | TUBE TL494CN
TL494CNE4 ACTIVE 0 to 70 0.30 | 1ku PDIP (N) | 16 25 | TUBE TL494CN
TL494CNSR ACTIVE 0 to 70 0.28 | 1ku SO (NS) | 16 2000 | LARGE T&R TL494
TL494CNSRG4 ACTIVE 0 to 70 0.28 | 1ku SO (NS) | 16 2000 | LARGE T&R TL494
TL494CPW ACTIVE 0 to 70 0.28 | 1ku TSSOP (PW) | 16 90 | TUBE T494
TL494CPWE4 ACTIVE 0 to 70 0.28 | 1ku TSSOP (PW) | 16 90 | TUBE T494
TL494CPWG4 ACTIVE 0 to 70 0.28 | 1ku TSSOP (PW) | 16 90 | TUBE T494
TL494CPWLE OBSOLETE TSSOP (PW) | 16 T494
TL494CPWR ACTIVE 0 to 70 0.25 | 1ku TSSOP (PW) | 16 2000 | LARGE T&R T494
TL494CPWRE4 ACTIVE 0 to 70 0.25 | 1ku TSSOP (PW) | 16 2000 | LARGE T&R T494
TL494CPWRG4 ACTIVE 0 to 70 0.25 | 1ku TSSOP (PW) | 16 2000 | LARGE T&R  
TL494ID ACTIVE -40 to 85 0.25 | 1ku SOIC (DW) | 16 40 | TUBE TL494C
TL494IDE4 ACTIVE -40 to 85 0.25 | 1ku SOIC (DW) | 16 40 | TUBE TL494C
TL494IDG4 ACTIVE -40 to 85 0.25 | 1ku SOIC (DW) | 16 40 | TUBE TL494C
TL494IDR ACTIVE -40 to 85 0.25 | 1ku SOIC (DW) | 16 2500 | LARGE T&R TL494C
TL494IDRE4 ACTIVE -40 to 85 0.25 | 1ku SOIC (DW) | 16 2500 | LARGE T&R TL494C
TL494IDRG4 ACTIVE -40 to 85 0.25 | 1ku SOIC (DW) | 16 2500 | LARGE T&R TL494C
TL494IN ACTIVE -40 to 85 0.30 | 1ku PDIP (N) | 16 25 | TUBE TL494CN
TL494INE4 ACTIVE -40 to 85 0.30 | 1ku PDIP (N) | 16 25 | TUBE TL494CN
TL494MJ OBSOLETE -55 to 125 CDIP (J) | 16  
TL494MJB OBSOLETE -55 to 125 CDIP (J) | 16  
TL494 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
TL494CD Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM   TL494CD
TL494CDBR Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM   TL494CDBR
TL494CDBRE4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM   TL494CDBRE4
TL494CDBRG4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM TL494CDBRG4 TL494CDBRG4
TL494CDE4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM   TL494CDE4
TL494CDG4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM TL494CDG4 TL494CDG4
TL494CDR Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM   TL494CDR
TL494CDRE4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM   TL494CDRE4
TL494CDRG3   TL494CDRG3
TL494CDRG4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM TL494CDRG4 TL494CDRG4
TL494CN Pb-Free (RoHS) CU NIPDAU N/A for Pkg Type   TL494CN
TL494CNE4 Pb-Free (RoHS) CU NIPDAU N/A for Pkg Type   TL494CNE4
TL494CNSR Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM   TL494CNSR
TL494CNSRG4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM TL494CNSRG4 TL494CNSRG4
TL494CPW Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM   TL494CPW
TL494CPWE4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM   TL494CPWE4
TL494CPWG4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM TL494CPWG4 TL494CPWG4
TL494CPWR Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM   TL494CPWR
TL494CPWRE4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM   TL494CPWRE4
TL494CPWRG4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM TL494CPWRG4 TL494CPWRG4
TL494ID Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM   TL494ID
TL494IDE4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM   TL494IDE4
TL494IDG4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM TL494IDG4 TL494IDG4
TL494IDR Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM   TL494IDR
TL494IDRE4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM   TL494IDRE4
TL494IDRG4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM TL494IDRG4 TL494IDRG4
TL494IN Pb-Free (RoHS) CU NIPDAU N/A for Pkg Type   TL494IN
TL494INE4 Pb-Free (RoHS) CU NIPDAU N/A for Pkg Type   TL494INE4
TL494 应用技术支持与电子电路设计开发资源下载
  1. TL494 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)
TL494 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
TL494 评估模块 TL494EVM 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