TL594: PWM Controller

Description: The TL594 PWM Controller incorporates all the func...
  • 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
  • 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
  • Off-line power supply
  • Buck converter
  • End Products
  • VPA (Vehicle Power Adapter)
  • LED Lighting
  • Technical Documentation & Design Resources
    Product Change Notification
    Availability and Samples
    TL594CDG
  • Status: Obsolete
  • Compliance: Pb-free 
  • Description: PWM Controller
  • Package Type: SOIC-16
  • Package Case Outline: 751B-05
  • MSL: 1
  • Container Type: TUBE
  • Container Qty: 48
  • TL594CDR2G
  • Status: Active
  • Compliance: Pb-free 
  • Description: PWM Controller
  • Package Type: SOIC-16
  • Package Case Outline: 751B-05
  • MSL: 1
  • Container Type: REEL
  • Container Qty: 2500
  • Inventory

  • Market Leadtime (weeks):4 to 8
  • Arrow:0
  • Digikey:>1K
  • Newark:>1K
  • PandS:<1K
  • TL594CDTBG
  • Status: Last Shipments
  • Compliance: Pb-free Halide free 
  • Description: PWM Controller
  • Package Type: TSSOP-16
  • Package Case Outline: 948F-01
  • MSL: 1
  • Container Type: TUBE
  • Container Qty: 96
  • TL594CDTBR2G
  • Status: Active
  • Compliance: Pb-free Halide free 
  • Description: PWM Controller
  • Package Type: TSSOP-16
  • Package Case Outline: 948F-01
  • MSL: 1
  • Container Type: REEL
  • Container Qty: 2500
  • Inventory

  • Market Leadtime (weeks):13 to 16
  • Arrow:0
  • Digikey:>1K
  • FutureElectronics:>100K
  • TL594CNG
  • Status: Obsolete
  • Compliance: Pb-free Halide free 
  • Description: PWM Controller
  • Package Type: PDIP-16
  • Package Case Outline: 648-08
  • MSL: NA
  • Container Type: TUBE
  • Container Qty: 500
  • Packages
    Specifications
  • Topology: Flyback  Push-Pull  Forward 
  • Phases:
  • Control Mode: Voltage Mode 
  • VCC Min (V):
  • VCC Max (V): 42 
  • fSW Typ (kHz): Up to 300 
  • Package Type: SOIC-16  TSSOP-16 
  • ON Semiconductor Full Web Site