CD5026,LM5026 Active Clamp Current-Mode PWM Controller Chip

The CD5026 PWM controller contains all of thefeatures necessary to implement power convertersutilizing the active clamp and reset technique withcurrent-mode control. With the active clamptechnique, higher efficiencies and greater powerdensities can be realized compared to conventionalcatch winding or RDC clamp and reset techniques.The CD5026 two control outputs are provided, themain power switch control (OUT_A) and the activeclamp switch control (OUT_B). The device can beconfigured to control either a P-Channel or N-Channel clamp switch.featuresAdditionalprogrammableincludemaximum duty cycle, line undervoltage lockout,cycle-by-cycle current limit, hiccup mode faultoperation with adjustable timeout delay, slopecompensation, synchronization input and outputcapability, soft-start, precision reference andthermal shutdown.

Current-Mode Control

Internal 100V Start-Up Bias Regulator 3A Peak Compound Main Gate Driver Programmable Line Undervoltage Lockout

Dual Mode Overcurrent Protection

Programmable Overlap or Deadtime between the Main and Active Clamp Outputs

Programmable Maximum Duty Cycle Clamp

Programmable Soft-Start

Leading Edge Blanking

Resistor Programmed Capable Oscillator

Oscillator Sync I/O Capability

Precision 5V Reference

Package:TSSOP16,WSON16