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
- Complete PWM Power-Control Circuitry
- Uncommitted Outputs for 200-mA Sink or Source Current
- Output Control Selects Single-Ended or Push-Pull Operation
- Internal Circuitry Prohibits Double Pulse at Either Output
- Variable Dead Time Provides Control Over Total Range
- Internal Regulator Provides a Stable 5-V Reference Supply With 5% Tolerance
- Circuit Architecture Allows Easy Synchronization
TL494 芯片订购指南
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
- TL494 数据资料 dataSheet 下载.PDF
- TI 德州仪器AC/DC 和 DC/DC 电源产品选型与价格参考 . xls
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TL494 工具与软件