Texas Instruments TPS549D22, User Manual, Page: 1 / 48

User’s Guide
TPS549D22 SWIFT™ Step-Down Converter Evaluation
Module User's Guide
ABSTRACT
This user's guide describes the characteristics, operation, and use of the TPS549D22 Evaluation Module
(EVM). The user's guide includes test information, descriptions, and results. A complete schematic diagram,
printed-circuit board layouts, and bill of materials are also included in this document. Throughout this user's
guide, the abbreviations EVM, TPS549D22EVM, and the term evaluation module are synonymous with the
TPS549D22EVM-784, unless otherwise noted.
Table of Contents
1 Introduction ............................................................................................................................................................................. 3
2 Description .............................................................................................................................................................................. 3
2.1 Typical End-User Applications........................................................................................................................................... 3
2.2 EVM Features.................................................................................................................................................................... 3
3 EVM Electrical Performance Specifications ......................................................................................................................... 4
4 Schematic ................................................................................................................................................................................ 5
5 Test Setup ................................................................................................................................................................................ 6
5.1 Test and Configuration Software........................................................................................................................................ 6
6 Test Equipment ....................................................................................................................................................................... 7
7 PWR-784EVM ........................................................................................................................................................................... 8
8 List of Test Points, Jumpers, and Switch ........................................................................................................................... 10
9 EVM Configuration Using the Fusion GUI .......................................................................................................................... 11
10 Test Procedure .................................................................................................................................................................... 12
10.1 Line and Load Regulation Measurement Procedure...................................................................................................... 12
10.2 Efficiency........................................................................................................................................................................ 12
10.3 Equipment Shutdown..................................................................................................................................................... 12
11 Performance Data and Typical Characteristic Curves ..................................................................................................... 13
11.1 Efficiency........................................................................................................................................................................ 13
11.2 Load Regulation............................................................................................................................................................. 13
11.3 Line Regulation............................................................................................................................................................... 14
11.4 Transient Response....................................................................................................................................................... 19
11.5 Output Ripple.................................................................................................................................................................. 19
11.6 Control On...................................................................................................................................................................... 20
11.7 Control Off...................................................................................................................................................................... 21
11.8 Thermal Image............................................................................................................................................................... 22
12 Fusion GUI ........................................................................................................................................................................... 23
13 EVM Assembly Drawing and PCB Layout ........................................................................................................................ 35
14 List of Materials .................................................................................................................................................................. 40
15 Revision History ................................................................................................................................................................. 42
List of Figures
Figure 4-1. PWR-784EVM Schematic......................................................................................................................................... 5
Figure 7-1. PWR-784EVM Overview........................................................................................................................................... 8
Figure 7-2. Tip and Barrel Measurement..................................................................................................................................... 8
Figure 7-3. EVM and USB Interface Adapter............................................................................................................................... 9
Figure 11-1. Efficiency of 1-V Output vs Load........................................................................................................................... 13
Figure 11-2. Load Regulation of 1-V Output.............................................................................................................................. 13
Figure 11-3. Line Regulation of 1-V Output............................................................................................................................... 14
Figure 11-4. PMBus V
OUT
Step-Up = 0.6 V to 1.2 V at 0 A........................................................................................................ 14
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SLUUBG4A – JULY 2016 – REVISED AUGUST 2021
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