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Texas Instruments UCC2891 manual Internal Split Ground Plane, Internal Signal Trace Layer

Models: UCC2891

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EVM Assembly Drawing and Layout

Figure 17. Internal Split Ground Plane

Figure 18. Internal Signal Trace Layer

SLUU178A –November 2003 –Revised December 2006

Using the UCC2891 Active Clamp Current Mode PWM Controller

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Texas Instruments UCC2891 manual Internal Split Ground Plane, Internal Signal Trace Layer, EVM Assembly Drawing and Layout

Contents

SLUU178A Power Supply MANUsers Guide December48-V to 3.3-V Forward Converter with Active Users GuideUsers Guide 1 Introduction2 Description Using the UCC2891 Active Clamp Current Mode PWM Controller2.1 Applications 2.2 Features3 UCC2891EVM Electrical Performance Specifications 4 SchematicTable 1. UCC2891EVM Performance Summary Submit Documentation Feedback Figure 1. UCC2891EVM SchematicSchematic Using the UCC2891 Active Clamp Current Mode PWM Controller5 EVM Test Setup Figure 2. Recommended EVM Test ConfigurationDANGER HIGH VOLTAGE 5.3 Network Analyzer 5.4 Recommended Wire Guage5.1 Output Load LOAD1 5.2 DC Input Source VIN6 Power Up/Down Test Procedures Using the UCC2891 Active Clamp Current Mode PWM Controller 7 Power Up/Down Test ProceduresPower Up/Down Test Procedures POWER LOSS vs OUTPUT CURRENTOutput Ripple Voltage Power Up/Down Test ProceduresUsing the UCC2891 Active Clamp Current Mode PWM Controller Input Ripple VoltageTransformer Primary Power Up/Down Test Procedures12 Using the UCC2891 Active Clamp Current Mode PWM Controller Output Ripple VoltageFigure 14. Top Side Component Assembly 8 EVM Assembly Drawing and LayoutSubmit Documentation Feedback Figure 15. Top Side Silk Screen Figure 16. Top Signal Trace LayerEVM Assembly Drawing and Layout Using the UCC2891 Active Clamp Current Mode PWM ControllerUsing the UCC2891 Active Clamp Current Mode PWM Controller Figure 18. Internal Signal Trace LayerFigure 17. Internal Split Ground Plane EVM Assembly Drawing and LayoutUsing the UCC2891 Active Clamp Current Mode PWM Controller Figure 19. Bottom Signal Trace LayerFigure 20. Bottom Side Component Assembly EVM Assembly Drawing and LayoutList of Materials 9 List of MaterialsTable 2. List of Materials Using the UCC2891 Active Clamp Current Mode PWM ControllerTable 2. List of Materials continued 10 ReferencesEVM IMPORTANT NOTICE DYNAMIC WARNINGS AND RESTRICTIONS