Texas Instruments UCC38500EVM manual Evm Warnings And Restrictions

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EVM WARNINGS AND RESTRICTIONS

It is important to operate this EVM within the input voltage range of 85 V to 265 V and the output voltage of 12 V +/− 5%.

Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are questions concerning the input range, please contact a TI field representative prior to connecting the input power.

Applying loads outside of the specified output range may result in unintended operation and/or possible permanent damage to the EVM. Please consult the EVM User’s Guide prior to connecting any load to the EVM output. If there is uncertainty as to the load specification, please contact a TI field representative.

During normal operation, some circuit components may have case temperatures greater than 50°C. The EVM is designed to operate properly with certain components above 50°C as long as the input and output ranges are maintained. These components include but are not limited to linear regulators, switching transistors, pass transistors, and current sense resistors. These types of devices can be identified using the EVM schematic located in the EVM User’s Guide. When placing measurement probes near these devices during operation, please be aware that these devices may be very warm to the touch.

Mailing Address:

Texas Instruments

Post Office Box 655303

Dallas, Texas 75265

Copyright 2001, Texas Instruments Incorporated

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Contents SLUU068C Using the UCC38500EVMUser’s Guide Power Management Products Using the UCC38500User’s Guide FebruaryIMPORTANT NOTICE EVM IMPORTANT NOTICE EVM WARNINGS AND RESTRICTIONS 1−1. DM38500 Evaluation Module Application Schematic Contents1.3.3 Step 3. Evaluating the Demonstration’s Boards Performance 1.3.4 Additional Information 1.4 DM38500 EVM PerformanceChapter General InformationPage TopicJ Controls Boost Preregulator to Near-unity Power Factor 1.1 FeaturesJ Accurate Power Limiting J Improved Feedforward Line Regulation 1.2 Description1.3 Operating Guidelines 1.3.2 Step 2. Applying Input Power1.3.1 Step 1. Load Connections 1.3.3 Step 3. Evaluating the Demonstration’s Boards PerformanceHigh-Voltage component. See High-Temperature componentSee EVM Warnings EVM Warnings andFigure 1−2. DM38500 EVM Efficiency Figure 1−3. DM38500 Power Factor1.4 DM38500 EVM Performance Distortion Figure 1−4. DM38500 Total Harmonic DistortionTotal V IN = 265DM38500 Board Layouts ReferenceDM38500 EVM Part Descriptions Table 2−1. DM38500 Part Descriptions 2.1 DM38500 EVM Part Descriptions3 Capacitor C38 is located at reference designator R38 on the PCB 2 Unless otherwise specified, all resistors have a tolerance of ±1%Description Value/Type Number2.2 DM38500 Board Layouts Figure 2−1. DM38500 EVM PC Board Top Assembly
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