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Texas Instruments UCC2891 manual Top Side Silk Screen . Top Signal Trace Layer

Models: UCC2891

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EVM Assembly Drawing and Layout

Figure 15. Top Side Silk Screen

Figure 16. Top Signal Trace Layer

Using the UCC2891 Active Clamp Current Mode PWM Controller

SLUU178A –November 2003 –Revised December 2006

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Texas Instruments UCC2891 manual Top Side Silk Screen . Top Signal Trace Layer, EVM Assembly Drawing and Layout

Contents

December Power Supply MANUsers Guide SLUU178AUsers Guide 48-V to 3.3-V Forward Converter with ActiveUsing the UCC2891 Active Clamp Current Mode PWM Controller 1 Introduction2 Description Users Guide2.2 Features 2.1 ApplicationsTable 1. UCC2891EVM Performance Summary 3 UCC2891EVM Electrical Performance Specifications4 Schematic Using the UCC2891 Active Clamp Current Mode PWM Controller Figure 1. UCC2891EVM SchematicSchematic Submit Documentation FeedbackDANGER HIGH VOLTAGE 5 EVM Test SetupFigure 2. Recommended EVM Test Configuration 5.2 DC Input Source VIN 5.4 Recommended Wire Guage5.1 Output Load LOAD1 5.3 Network Analyzer6 Power Up/Down Test Procedures POWER LOSS vs OUTPUT CURRENT 7 Power Up/Down Test ProceduresPower Up/Down Test Procedures Using the UCC2891 Active Clamp Current Mode PWM ControllerInput Ripple Voltage Power Up/Down Test ProceduresUsing the UCC2891 Active Clamp Current Mode PWM Controller Output Ripple VoltageOutput Ripple Voltage Power Up/Down Test Procedures12 Using the UCC2891 Active Clamp Current Mode PWM Controller Transformer Primary8 EVM Assembly Drawing and Layout Figure 14. Top Side Component AssemblyUsing the UCC2891 Active Clamp Current Mode PWM Controller Figure 15. Top Side Silk Screen Figure 16. Top Signal Trace LayerEVM Assembly Drawing and Layout Submit Documentation FeedbackEVM Assembly Drawing and Layout Figure 18. Internal Signal Trace LayerFigure 17. Internal Split Ground Plane Using the UCC2891 Active Clamp Current Mode PWM ControllerEVM Assembly Drawing and Layout Figure 19. Bottom Signal Trace LayerFigure 20. Bottom Side Component Assembly Using the UCC2891 Active Clamp Current Mode PWM ControllerUsing the UCC2891 Active Clamp Current Mode PWM Controller 9 List of MaterialsTable 2. List of Materials List of Materials10 References Table 2. List of Materials continuedEVM IMPORTANT NOTICE DYNAMIC WARNINGS AND RESTRICTIONS