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TL594: PWM Controller

Datasheet: Precision Switchmode Pulse Width Modulation Control Circuit
Rev. 5 (145.0kB)
Product Overview
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» Product Change Notification
The TL594 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 systems engineer the flexibility to tailor the power-supply control circuitry to a specific application.

The TL594 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 regulator with a precision of 1.5%, an undervoltage lockout control circuit, and output control circuitry.

The error amplifiers have a common-mode voltage range of -0.3 V to VCC-2 V. The DTC 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 be used to drive the common circuitry in synchronous multiple-rail power supplies.

The uncommitted output transistors provide either common-emitter or emitter-follower output capability. Each device provides for push-pull or single-ended output operation, with selection by means of the output-control function. The architecture of these devices prohibits the possibility of either output being pulsed twice during push-pull operation. The undervoltage lockout control circuit locks the outputs off until the internal circuitry is operational.
The TL594CD, CN, CDTB are characterized for operation from -40C to 85C.
Features   Benefits
     
  • PWM Buck Controller Configuration
 
  • Simple to use in buck configuration
  • Variable Frequency Operation (up to 300 KHz)
 
  • Optimize system size and efficiency
  • Complete Pulse Width Modulation Control Circuitry
   
  • On-Chip Oscillator with Master or Slave Operation
   
  • On-Chip Error Amplifiers
   
  • On-Chip 5.0 V Reference, 1.5% Accuracy
   
  • 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
Data Sheets (1) Package Drawings (3)
Availability & Samples
Specifications
Case Outlines
Product
Status
Compliance
Description
Package
MSL
Container
Budgetary Price/Unit
Type
Case Outline
Type
Temperature
Type
Qty.
TL594CDG Obsolete 
Pb-free
TL594 SOIC-16 751B-05 1 260 Tube 48  
TL594CDR2G Active
Pb-free
TL594 SOIC-16 751B-05 1 260 Tape and Reel 2500 $0.3077
TL594CDTBG Obsolete 
Pb-free
Halide free
TL594 TSSOP-16 948F-01 1 260 Tube 96  
TL594CDTBR2G Active
Pb-free
Halide free
TL594 TSSOP-16 948F-01 1 260 Tape and Reel 2500 Contact Sales Office
TL594CNG Obsolete 
Pb-free
Halide free
TL594 PDIP-16 648-08 NA Tube 500  
Market Leadtime (weeks) : Contact Factory
PandS   (2020-09-14 00:00) : <100
Market Leadtime (weeks) : Contact Factory
PandS   (2020-09-14 00:00) : <1K
Market Leadtime (weeks) : Contact Factory
Market Leadtime (weeks) : Contact Factory
Market Leadtime (weeks) : Contact Factory
PandS   (2020-09-14 00:00) : <1K

Product
Description
Pricing ($/Unit)
Compliance
Status
Topology
Phases
Control Mode
VCC Min (V)
VCC Max (V)
fSW Typ (kHz)
Package Type
TL594CDR2G  
 $0.3077 
Pb
 Active   
Flyback
Forward
Push-Pull
1
Voltage Mode
6
42
Up to 300
SOIC-16
TL594CDTBR2G  
Pb
H
 Active   
Flyback
Forward
Push-Pull
1
Voltage Mode
6
42
Up to 300
TSSOP-16
Case Outlines
751B-05    648-08    948F-01   
Packages
TL594: PWM Controller
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