Texas Instruments UCC2891 manual Dynamic Warnings and Restrictions

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DYNAMIC WARNINGS AND RESTRICTIONS

It is important to operate this EVM within the input voltage range of 0 Vdc to 72 Vdc.

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.

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Post Office Box 655303

Dallas, Texas 75265

Copyright © 2003--2006, Texas Instruments Incorporated

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Contents Users Guide Users Guide Introduction DescriptionApplications UCC2891EVM Electrical Performance Specifications SchematicUCC2891EVM Schematic EVM Test Setup VoutOutput Load LOAD1 Power Up/Down Test Procedures Overall Efficiency Output Current Input Ripple Voltage SR Gate Drive EVM Assembly Drawing and Layout Top Side Component AssemblyTop Side Silk Screen Internal Split Ground Plane Bottom Signal Trace Layer List of Materials List of MaterialsReferences EVM Important Notice Dynamic Warnings and Restrictions