Texas Instruments TPS548D21EVM-784, User Manual

Page: 1 / 29

1 SLUUBG3A – July 2016 – Revised August 2016
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
TPS548D21EVM-784, 40-A Single Synchronous Step-Down Converter With
Full Differential Sense
All trademarks are the property of their respective owners.
User's Guide
SLUUBG3A – July 2016 – Revised August 2016
TPS548D21EVM-784, 40-A Single Synchronous Step-Down
Converter With Full Differential Sense
This user's guide describes the characteristics, operation, and use of the TPS548D21 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, TPS548D21EVM, and the term evaluation module are
synonymous with the TPS548D21EVM-784, unless otherwise noted.
Contents
1 Introduction
...................................................................................................................
2
2 Description
....................................................................................................................
2
2.1 Typical End-User Applications
....................................................................................
2
2.2 EVM Features
.......................................................................................................
2
3 EVM Electrical Performance Specifications
..............................................................................
3
4 Schematic
.....................................................................................................................
4
5 Test Equipment
..............................................................................................................
5
6 PWR-784EVM
................................................................................................................
6
7 List of Test Points, Jumpers, and Switch
.................................................................................
7
8 Test Procedure
...............................................................................................................
8
8.1 Line and Load Regulation Measurement Procedure
...........................................................
8
8.2 Efficiency
.............................................................................................................
8
8.3 Equipment Shutdown
...............................................................................................
9
9 Performance Data and Typical Characteristic Curves
..................................................................
9
9.1 Efficiency
.............................................................................................................
9
9.2 Load Regulation
.....................................................................................................
9
9.3 Line Regulation
....................................................................................................
10
9.4 Transient Response
...............................................................................................
12
9.5 Output Ripple
......................................................................................................
13
9.6 Control On
..........................................................................................................
14
9.7 Control Off
..........................................................................................................
15
9.8 Thermal Image
.....................................................................................................
16
10 EVM Assembly Drawing and PCB Layout
..............................................................................
17
11 List of Materials
.............................................................................................................
22
List of Figures
1 PWR-784EVM Schematic
..................................................................................................
4
2 PWR-784EVM Overview
....................................................................................................
6
3 Tip and Barrel Measurement
...............................................................................................
6
4 Efficiency of 1-V Output vs Load
..........................................................................................
9
5 Load Regulation of 1-V Output
............................................................................................
9
6 Line Regulation of 1-V Output
............................................................................................
10
7 Real Tracking POD, 256 µs PGD 8 ms
.................................................................................
10
8 Sequencing POD, 256 µs PGD 8 ms Ext SS Pulldown PG
..........................................................
11
9 Transient Response of 1-V Output at 12 V
IN
, Transient is 8 A to 32 A, 2.5 A/µs
..................................
12
10 Output Ripple and SW Node of 1-V Output at 12 V
IN
, 0-A Output
...................................................
13