CS51221: Enhanced Voltage Mode PWM Controller for Forward or Flyback

Description: The CS51221 Enhanced Voltage Mode PWM Controller c...
  • The CS51221 Enhanced Voltage Mode PWM Controller contains all of the features necessary for basic voltage mode operation. This PWM controller has been optimized for high frequency primary side control operation. In addition, this device includes such features as: Soft Start, accurate duty cycle limit control, less than 50uA startup current, over and under voltage protection and bidirectional synchronization. The CS51221 is available in a SOIC-16 and TSSOP-16 surface mount packages.
  • Features
  • 1MHz Frequency Capability
  • Fixed Frequency Voltage Mode Operation, with Feed Forward
  • Thermal Shutdown
  • Under Voltage Lock-out
  • Accurate Programmable Max Duty Cycle Limit
  • 1A Sink/Source Gate Drive
  • Programmable Pulse-by-Pulse Overcurrent Protection
  • Leading Edge Current Sense Blanking
  • 75ns Shutdown Propagation Delay
  • Programmable Soft Start
  • Undervoltage Protection
  • Overvoltage Protection with Programmable Hysteresis
  • Bi-directional Synchronization
  • 25ns GATE Rise and Fall Time (1nF load)
  • 3.3V 3% Reference Voltage Output
  • Pb-Free Package is Available
  • Applications
  • Hot Swap - DC-DC Conversion
  • Technical Documentation & Design Resources
    Product Change Notification
    Availability and Samples
    CS51221ED16G
  • Status: Last Shipments
  • Compliance: AEC Qualified PPAP Capable Pb-free Halide free 
  • Description: Enhanced Voltage Mode PWM Controller for Forward or Flyback
  • Package Type: SOIC-16
  • Package Case Outline: 751B-05
  • MSL: 1
  • Container Type: TUBE
  • Container Qty: 48
  • CS51221EDR16G
  • Status: Active
  • Compliance: AEC Qualified PPAP Capable Pb-free Halide free 
  • Description: Enhanced Voltage Mode PWM Controller for Forward or Flyback
  • Package Type: SOIC-16
  • Package Case Outline: 751B-05
  • MSL: 1
  • Container Type: REEL
  • Container Qty: 2500
  • Inventory

  • Market Leadtime (weeks):2 to 4
  • Arrow:0
  • ON Semiconductor:10,000
  • CS51221EDTB16G
  • Status: Last Shipments
  • Compliance: AEC Qualified PPAP Capable Pb-free Halide free 
  • Description: Enhanced Voltage Mode PWM Controller for Forward or Flyback
  • Package Type: TSSOP-16
  • Package Case Outline: 948F-01
  • MSL: 1
  • Container Type: TUBE
  • Container Qty: 96
  • CS51221EDTB16R2G
  • Status: Last Shipments
  • Compliance: AEC Qualified PPAP Capable Pb-free Halide free 
  • Description: Enhanced Voltage Mode PWM Controller for Forward or Flyback
  • Package Type: TSSOP-16
  • Package Case Outline: 948F-01
  • MSL: 1
  • Container Type: REEL
  • Container Qty: 2500
  • Packages
    Specifications
  • Topology: Forward 
  • Control Mode: Voltage Mode 
  • fsw Typ (kHz): Up to 1000 
  • Stand-by Mode: No 
  • UVLO (V): Yes 
  • Short Circuit Protection: No 
  • Latch: Yes 
  • Soft Start: Yes 
  • VCC Max (V): 15 
  • Drive Cap. (mA): 1000 
  • Package Type: SOIC-16 
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