CD5025,LM5025 Active Clamp Voltage Mode PWM Controller Chip

CD5025 is a voltage PWM controller that implementspower converters utilizing the Active Clamp / Resettechnique. With the active clamp technique, higherefficiencies and greater power densities can berealized compared to conventional catch winding orRDC clamp / reset techniques.Two control outputs are provided, the main powerswitch control (OUT_A) and the active clamp switchcontrol (OUT_B). The two internal compound gatedrivers parallel both MOS and Bipolar devices,providing superior gate drive characteristics. Thiscontroller is designed for high-speed operationincluding an oscillator frequency range up to 1MHzand total propagation delays less than 100ns.

Internal Start-Up Bias Regulator 3A Compound Main Gate Driver

Programmable Line Under-Voltage Lockout

(UVLO) with Adjustable Hysteresis Voltage Mode Control with Feed-Forward Adjustable Dual Mode Over-Current Protection Programmable Overlap or Deadtime between the Main and Active Clamp Outputs

Voltage x Second Maximum Duty Cycle Clamp

Programmable Soft-Start

Current Sense Leading Edge Blanking

Single Resistor Programmable Oscillator

Oscillator Sync Capability

Precision 5V Reference

Thermal Shutdown

Package: TSSOP16, WSON16

DC/DC Power Supply