TL494:PWM Controller (up to 200 kHz)
The TL494 PWM Controller 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 PWM Controller 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. The uncommitted output transistors provide either common-emitter or emitter-follower output capability. This PWM Controller provides for push-pull or single-ended output operation, which can be selected through the output-control function. The architecture of this device prohibits the possibility of either output being pulsed twice during push-pull operation. The TL494C PWM Controller is characterized for operation from 0C to 70C. The TL494I is characterized for operation from -40C to 85C. The TL494B is characterized for operation from -40C to 125C. The NCV494B is characterized for -40C to 125C and certified for automotive applications.
特性
- Complete Pulse Width Modulation Control Circuitry
- On-Chip Oscillator with Master or Slave Operation
- On-Chip Error Amplifiers
- On-Chip 5.0 V Reference
- Adjustable Deadtime Control
- Uncommitted Output Transistors Rated to 500 mA Source or Sink
- Output Control for Push-Pull or Single-Ended Operation
- Undervoltage Lockout
- Pb-Free Packages are Available*
应用
- Off-line power supply
- Buck converter
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终端产品
- VPA (Vehicle Power Adapter)
- LED Lighting
封装图 PACKAGE DIMENSIONS
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订购信息 Ordering Information
| 产品 |
状况 |
Compliance |
具体说明 |
封装 |
MSL* |
容器 |
预算价格 (1千个数量的单价） |
| 类型 |
外形 |
类型 |
数量 |
| TL494BDG |
Last Shipments |
|
PWM Controller (up to 200 kHz), TA= -40°C to +125°C |
SOIC-16 |
751B-05 |
1 |
Tube |
48 |
|
| TL494BDR2G |
Active |
|
PWM Controller (up to 200 kHz), TA= -40°C to +125°C |
SOIC-16 |
751B-05 |
1 |
Tape and Reel |
2500 |
$0.52
|
| TL494CDG |
Last Shipments |
|
PWM Controller (up to 200 kHz), TA= 0°C to +70°C |
SOIC-16 |
751B-05 |
1 |
Tube |
48 |
|
| TL494CDR2G |
Active |
|
PWM Controller (up to 200 kHz), TA= 0°C to +70°C |
SOIC-16 |
751B-05 |
1 |
Tape and Reel |
2500 |
$0.4933 |
| TL494CNG |
Lifetime |
|
PWM Controller (up to 200 kHz), TA= 0°C to +70°C |
PDIP-16 |
648-08 |
|
Tube |
500 |
$0.5333 |
| TL494ING |
Lifetime |
|
PWM Controller (up to 200 kHz), TA= -40°C to 85°C |
PDIP-16 |
648-08 |
|
Tube |
500 |
$0.5733 |
数据资料DataSheet下载
