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CS51021A: Enhanced Current Mode PWM Controller for Forward or Flyback (36-72 V Telecom)

Datasheet: Enhanced Current Mode PWM Controller (36-72V Telecom)
Rev. 6 (129.0kB)
Product Overview
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The CS51021 Fixed Frequency PWM Current Mode Controller family provides all necessary features required for ac-dc or dc-dc primary side control. Several features are included eliminating the additional components needed to implement them externally. In addition to low start-up current (75 µA)and high frequency operation capability, the Enhanced Current Mode PWM Controller includes overvoltage and undervoltage monitoring, externally programmable dual threshold overcurrent protection, current sense leading edge blanking, current slope compensation, accurate duty cycle control and an externally available 5.0 volt reference. The CS51021A features bidirectional synchronization capability, while the CS51022A offers a sleep mode with 100 µA maximum IC current consumption. The CS51021A/2A Enhanced Current Mode PWM Controllers are available in a SOIC-16 or TSSOP-16 lead package.
Features
 
  • 75 mA Max.Startup Current
  • Fixed Frequency Current Mode Control
  • 1.0 MHz Switching Frequency
  • Undervoltage Protection Monitor
  • Overvoltage Protection Monitor with Programmable Hysteresis
  • Programmable Dual Threshold Overcurrent Protection with Delayed Restart
  • Programmable Soft Start
  • Accurate Maximum Duty Cycle Limit
  • Programmable Slope Compensation
  • Leading Edge Current Sense Blanking
  • 1.0 A Sink/Source Gate Drive
  • Bidirectional Synchronization (CS51021A)
  • 50ns PWM Propagation Delay
  • 100 A Max Sleep Current (CS51022A)
  • Pb-Free Packages are Available
Applications   End Products
  • 36 - 72V Telecom
 
  • DC-DC Telecom Bricks
Technical Documentation & Design Resources
Data Sheets (1) Evaluation Board Documents (1)
Package Drawings (1)  
Availability & Samples
Specifications
Case Outlines
Application Diagram
Product
Status
Compliance
Description
Package
MSL
Container
Budgetary Price/Unit
Type
Case Outline
Type
Temperature
Type
Qty.
CS51021AEDR16G Active
Pb-free
Halide free
CS51021A SOIC-16 751B-05 1 260 Tape and Reel 2500 $1.2
Market Leadtime (weeks) : 8 to 12

Product
Description
Pricing ($/Unit)
Compliance
Status
Topology
Phases
Control Mode
VCC Min (V)
VCC Max (V)
fSW Typ (kHz)
Package Type
CS51021AEDR16G  
 $1.2 
Pb
H
 Active   
Flyback
Forward
Push-Pull
1
Current Mode
8.2
20
Up to 1000
SOIC-16
Case Outlines
751B-05   
Packages
CS51021A: Enhanced Current Mode PWM Controller for Forward or Flyback (36-72 V Telecom)
CS51021A: Enhanced Current Mode PWM Controller for Forward or Flyback (36-72 V Telecom)
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