Texas Instruments UCC38500EVM manual User’s Guide, Using the UCC38500, February, SLUU068C

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Using the UCC38500

Using the UCC38500

User’s Guide

February 2005

Power Management Products

SLUU068C

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Contents SLUU068C Using the UCC38500EVMUser’s Guide User’s Guide Using the UCC38500Power Management Products FebruaryIMPORTANT NOTICE EVM IMPORTANT NOTICE EVM WARNINGS AND RESTRICTIONS 1.3.3 Step 3. Evaluating the Demonstration’s Boards Performance Contents1−1. DM38500 Evaluation Module Application Schematic 1.3.4 Additional Information 1.4 DM38500 EVM PerformancePage General InformationChapter TopicJ Accurate Power Limiting J Improved Feedforward Line Regulation 1.1 FeaturesJ Controls Boost Preregulator to Near-unity Power Factor 1.2 Description1.3.1 Step 1. Load Connections 1.3.2 Step 2. Applying Input Power1.3 Operating Guidelines 1.3.3 Step 3. Evaluating the Demonstration’s Boards PerformanceSee EVM Warnings High-Temperature componentHigh-Voltage component. See EVM Warnings andFigure 1−2. DM38500 EVM Efficiency Figure 1−3. DM38500 Power Factor1.4 DM38500 EVM Performance Total Figure 1−4. DM38500 Total Harmonic DistortionDistortion V IN = 265DM38500 Board Layouts ReferenceDM38500 EVM Part Descriptions 2.1 DM38500 EVM Part Descriptions Table 2−1. DM38500 Part DescriptionsDescription 2 Unless otherwise specified, all resistors have a tolerance of ±1%3 Capacitor C38 is located at reference designator R38 on the PCB Value/Type NumberFigure 2−1. DM38500 EVM PC Board Top Assembly 2.2 DM38500 Board Layouts