SG3525A: PWM Controller

Description: The SG3525A PWM Controller offers improved perform...
  • The SG3525A PWM Controller offers improved performance and lower external parts count when implemented for controlling all types of switching power supplies. The on-chip +5.1 V reference is trimmed to +/-1% and the error amplifier has an input common-mode voltage range that includes the reference voltage, thus eliminating the need for external divider resistors. A sync input to the oscillator enables multiple units to be slaved or a single unit to be synchronized to an external system clock. A wide range of deadtime can be programmed by a single resistor connected between the CT and Discharge pins. This device also features built-in soft-start circuitry, requiring only an external timing capacitor. A shutdown pin controls both the soft-start circuitry and the output stages, providing instantaneous turn off through the PWM latch with pulsed shutdown, as well as soft-start recycle with longer shutdown commands. The under voltage lockout inhibits the outputs and the changing of the soft-start capacitor when VCC is below nominal. The output stages are totem-pole design capable of sinking and sourcing in excess of 200 mA. The output stage of the SG3525A features NOR logic resulting in a low output for an off-state.
  • Features
  • 8.0 V to 35 V Operation
  • 5.1 V +/- 1.0% Trimmed Reference
  • 100 Hz to 400 kHz Oscillator Range
  • Separate Oscillator Sync Pin
  • Adjustable Deadtime Control
  • Input Undervoltage Lockout
  • Latching PWM to Prevent Multiple Pulses
  • Pulse-by-Pulse Shutdown
  • Dual Source/Sink Outputs: +/- 400 mA Peak
  • Pb-Free Packages are Available*
  • Applications
  • Half Bridge
  • Push-Pull
  • Technical Documentation & Design Resources
    Product Change Notification
    Availability and Samples
    SG3525ADWG
  • Status: Last Shipments
  • Compliance: Pb-free Halide free 
  • Description: PWM Controller
  • Package Type: SOIC-16W
  • Package Case Outline: 751G-03
  • MSL: 3
  • Container Type: TUBE
  • Container Qty: 47
  • SG3525ADWR2G
  • Status: Active
  • Compliance: Pb-free Halide free 
  • Description: PWM Controller
  • Package Type: SOIC-16W
  • Package Case Outline: 751G-03
  • MSL: 3
  • Container Type: REEL
  • Container Qty: 1000
  • Inventory

  • Market Leadtime (weeks):17 to 20
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  • Digikey:>1K
  • FutureElectronics:>1K
  • Newark:<1K
  • PandS:<1K
  • SG3525ANG
  • Status: Active
  • Compliance: Pb-free Halide free 
  • Description: PWM Controller
  • Package Type: PDIP-16
  • Package Case Outline: 648-08
  • MSL: NA
  • Container Type: TUBE
  • Container Qty: 25
  • Inventory

  • Market Leadtime (weeks):8 to 12
  • Arrow:0
  • Avnet:<1K
  • Digikey:>1K
  • FutureElectronics:>1K
  • Newark:>1K
  • ON Semiconductor:462,450
  • PandS:<1K
  • Wpi:>1K
  • Packages
    Specifications
  • Topology: Step-Up  Step-Down  Push-Pull  Forward  Flyback  Half-Bridge 
  • Phases:
  • Control Mode: Voltage Mode 
  • VCC Min (V):
  • VCC Max (V): 35 
  • fSW Typ (kHz): 400 
  • Package Type: SOIC-16W  PDIP-16 
  • ON Semiconductor Full Web Site