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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)
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Product Overview
製品説明
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.
特長   利点
     
  • 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*
   
アプリケーション   最終製品
  • Off-line power supply
  • Buck converter
 
  • VPA (Vehicle Power Adapter)
  • LED Lighting
技術資料 & デザイン・リソース
アプリケーション ノート (1) パッケージ図 (2)
データシート (1)  
供給状況 & サンプル
製品
状態
Compliance
内容
外形
MSL*
梱包形態
予算 価格/Unit
タイプ
Case Outline
タイプ
数量
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  
面実装デバイスためのモイスチャー・レベル(260°Cリフローでの鉛フリー測定、235°Cリフローでの鉛フリー以外測定)
マーケットリードタイム(週) : Contact Factory
マーケットリードタイム(週) : 2 to 4
Arrow   (Sat Jul 11 15:54:02 MST 2015) : 585
Digikey   (2015-07-09) : >1K
Mouser   (2015-07-09) : <1K
ON Semiconductor   (2015-07-08) : 2,500
マーケットリードタイム(週) : Contact Factory
PandS   (2015-07-09) : <100
マーケットリードタイム(週) : 4 to 8
Arrow   (Sat Jul 11 15:54:02 MST 2015) : 118584
Digikey   (2015-07-09) : >1K
Mouser   (2015-07-09) : >1K
マーケットリードタイム(週) : Contact Factory
ON Semiconductor   (2015-07-08) : 2,325
マーケットリードタイム(週) : Contact Factory
Datasheet: PWM Control Circuit (up to 200 kHz)
Rev. 6 (144.0kB)
»信頼性データを表示する
»材料組成を表示
»製品変更通知 (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 
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Do you need a device with a wider temperature range? NCV494