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TL494: PWM Controller (up to 200 kHz)

Overview
Specifications
Packages
Datasheet: PWM Control Circuit (up to 200 kHz)
Rev. 6 (144.0kB)
»Показать данные по надёжности
»Показать химический состав
»Уведомление об обновлениях схем (4)
Product Overview
Описание продукта
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.
Отличительные черты   Benefits
     
  • Variable Frequency Operation (up to 200 KHz)
 
  • Optimize system size and efficiency
  • PWM Buck Controller Configuration
 
  • Simple to use in buck configuration
  • 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*
   
Применения   End Products
  • Off-line power supply
  • Buck converter
 
  • VPA (Vehicle Power Adapter)
  • LED Lighting
Технические информацие
Статьи по применению (1) Типы корпусов (2)
Спецификацие (1)  
Наличие и образцы
Продукт
Состояние
Compliance
Описание
Корпус
MSL*
Контейнер
Бюджетная цена единицы
Тип
Размеры
Тип
Кол.
TL494BDG Last Shipments 
Pb-free
PWM Controller (up to 200 kHz), TA= -40°C to +125°C SOIC-16 751B-05 1 Tube 48  
TL494BDR2G Active
Pb-free
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 
Pb-free
PWM Controller (up to 200 kHz), TA= 0°C to +70°C SOIC-16 751B-05 1 Tube 48  
TL494CDR2G Active
Pb-free
PWM Controller (up to 200 kHz), TA= 0°C to +70°C SOIC-16 751B-05 1 Tape and Reel 2500 $0.4933
TL494CNG Last Shipments 
Pb-free
Halide free
PWM Controller (up to 200 kHz), TA= 0°C to +70°C PDIP-16 648-08 NA Tube 500  
TL494ING Last Shipments 
Pb-free
Halide free
PWM Controller (up to 200 kHz), TA= -40°C to 85°C PDIP-16 648-08 NA Tube 500  
* Уровень чувствительности компонента к влажности
Market Leadtime (weeks) : Contact Factory
Market Leadtime (weeks) : 2 to 4
Arrow   (Sat Jul 11 07:34:21 MST 2015) : 585
Digikey   (2015-07-09) : >1K
Mouser   (2015-07-09) : <1K
ON Semiconductor   (2015-07-08) : 2,500
Market Leadtime (weeks) : Contact Factory
PandS   (2015-07-09) : <100
Market Leadtime (weeks) : 4 to 8
Arrow   (Sat Jul 11 07:34:21 MST 2015) : 118584
Digikey   (2015-07-09) : >1K
Mouser   (2015-07-09) : >1K
Market Leadtime (weeks) : Contact Factory
ON Semiconductor   (2015-07-08) : 2,325
Market Leadtime (weeks) : Contact Factory
Datasheet: PWM Control Circuit (up to 200 kHz)
Rev. 6 (144.0kB)
»Показать данные по надёжности
»Показать химический состав
»Уведомление об обновлениях схем (4)
Product Overview

Product Compliance Status Description Topology Phases Control Mode VCC Min (V) VCC Max (V) fSW Typ (kHz) tres Typ (ns) Package Type
 Pb-free   Active     PWM Controller (up to 200 kHz), TA= -40°C to +125°C 
 Flyback 
 Forward 
 Half-Bridge 
 Push-Pull 
 Step-Down 
 Step-Up 
 1   Voltage Mode   7   40   Up to 200   100   SOIC-16 
 Pb-free   Active     PWM Controller (up to 200 kHz), TA= 0°C to +70°C 
 Flyback 
 Forward 
 Half-Bridge 
 Push-Pull 
 Step-Down 
 Step-Up 
 1   Voltage Mode   7   40   Up to 200   100   SOIC-16 
Ранее просмотренные схемы
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Do you need a device with a wider temperature range? NCV494