UCC38050 - Texas Instruments

UCC38050 Transition Mode PFC Controller

The UCC38050 and UCC38051 are PFC controllers for low-to-medium power applications requiring compliance with IEC 1000-3-2 harmonic reduction standard. The controllers are designed for a boost preregulator operating in transition mode (also referred to as boundary-conduction mode or critical conduction-mode operation). They feature a transconductance voltage .

Features

•1 Transition Mode PFC Controller for Low Implementation Cost
• Industry Pin Compatibility With Improved Feature Set
• Improved Transient Response With Slew-Rate Comparator
• Zero Power Detect to Prevent Overvoltage Protection (OVP) During Light Load Conditions
• Accurate Internal VREF for Tight Output Regulation
• Two UVLO Options
• OVP, Open-Feedback Protection, and Enable Circuits
• ±750-mA Peak Gate Drive Current
• Low Start-Up and Operating Currents
• Lead (Pb)-Free Packages 3 Description The UCC38050 and UCC38051 are PFC controllers for low-to-medium power applications requiring complia.