Texas Instruments UCC2891 Active Clamp Current Mode PWM Controller User Guide

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48-V to 3.3-V Forward Converter with Active Clamp Reset Using the UCC2891 Active Clamp Current Mode PWM Controller

User's Guide

December 2006

Power Supply MAN

SLUU178A

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Contents Users Guide Users Guide Description IntroductionApplications Schematic UCC2891EVM Electrical Performance SpecificationsUCC2891EVM Schematic Vout EVM Test SetupOutput Load LOAD1 Power Up/Down Test Procedures Overall Efficiency Output Current Input Ripple Voltage SR Gate Drive Top Side Component Assembly EVM Assembly Drawing and LayoutTop Side Silk Screen Internal Split Ground Plane Bottom Signal Trace Layer List of Materials List of MaterialsReferences EVM Important Notice Dynamic Warnings and Restrictions