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TL494: PWM Controller (up to 200 kHz)

Datasheet: SWITCHMODE Pulse Width Modulation Control Circuit
Rev. 6 (144.0kB)
Product Overview
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» Product Change Notification
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.
Features   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*
   
Applications   End Products
  • Off-line power supply
  • Buck converter
 
  • VPA (Vehicle Power Adapter)
  • LED Lighting
Technical Documentation & Design Resources
Application Notes (1) Package Drawings (2)
Data Sheets (1)  
Availability & Samples
Specifications
Case Outlines
Product
Status
Compliance
Description
Package
MSL
Container
Budgetary Price/Unit
Type
Case Outline
Type
Temperature
Type
Qty.
TL494BDG Obsolete 
Pb-free
TL494, TA= -40°C to +125°C SOIC-16 751B-05 1 260 Tube 48  
TL494BDR2G Active
Pb-free
TL494, TA= -40°C to +125°C SOIC-16 751B-05 1 260 Tape and Reel 2500 $0.2652
TL494CDG Obsolete 
Pb-free
TL494, TA= 0°C to +70°C SOIC-16 751B-05 1 260 Tube 48  
TL494CDR2G Active
Pb-free
TL494, TA= 0°C to +70°C SOIC-16 751B-05 1 260 Tape and Reel 2500 $0.2605
TL494CNG Obsolete 
Pb-free
Halide free
TL494, TA= 0°C to +70°C PDIP-16 648-08 NA Tube 500  
TL494ING Obsolete 
Pb-free
Halide free
TL494, TA= -40°C to 85°C PDIP-16 648-08 NA Tube 500  
Market Leadtime (weeks) : Contact Factory
Market Leadtime (weeks) : 17 to 20
FutureElectronics   (2020-08-19 00:00) : >1K
Market Leadtime (weeks) : Contact Factory
PandS   (2020-09-14 00:00) : <100
Market Leadtime (weeks) : Contact Factory
Market Leadtime (weeks) : Contact Factory
Market Leadtime (weeks) : Contact Factory

Product
Description
Pricing ($/Unit)
Compliance
Status
Topology
Phases
Control Mode
VCC Min (V)
VCC Max (V)
fSW Typ (kHz)
Package Type
TL494BDR2G  
 $0.2652 
Pb
 Active   
Flyback
Forward
Half-Bridge
Push-Pull
Step-Down
Step-Up
1
Voltage Mode
7
40
Up to 200
SOIC-16
TL494CDR2G  
 $0.2605 
Pb
 Active   
Flyback
Forward
Half-Bridge
Push-Pull
Step-Down
Step-Up
1
Voltage Mode
7
40
Up to 200
SOIC-16
Case Outlines
751B-05    648-08   
Packages
TL494: PWM Controller (up to 200 kHz)
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Associated Products
Do you need a device with A wider temperature range? NCV494

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