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User's Guide
SLVU768–August 2012
TPS542941 Dual Channel SWIFT™ Evaluation Module
This user's guide contains information for the TPS542941EVM-057 evaluation module as well as for the
TPS542941. Included are the performance specifications, schematic, and the bill of materials of the
TPS542941 EVM.
Contents
1 Introduction .................................................................................................................. 3
2 Performance Specification Summary ..................................................................................... 3
3 Modifications ................................................................................................................. 4
3.1 Output Voltage Setpoint ........................................................................................... 4
3.2 Output Filter and Closed-Loop Response ...................................................................... 4
4 Test Setup and Results .................................................................................................... 5
4.1 Input/Output Connections ......................................................................................... 5
4.2 Start-Up Procedure ................................................................................................ 5
4.3 Efficiency ............................................................................................................ 6
4.4 Load Regulation .................................................................................................... 8
4.5 Line Regulation ..................................................................................................... 9
4.6 Load Transient Response ....................................................................................... 10
4.7 Output Voltage Ripple ........................................................................................... 11
4.8 Input Voltage Ripple .............................................................................................. 13
4.9 Start-Up ............................................................................................................ 14
5 Board Layout ............................................................................................................... 16
5.1 Layout .............................................................................................................. 16
6 Schematic, Bill of Materials, and Reference ........................................................................... 20
6.1 Schematic ......................................................................................................... 20
6.2 Bill of Materials .................................................................................................... 21
6.3 Reference .......................................................................................................... 21
List of Figures
1 TPS542941EVM Converter 1 Efficiency ................................................................................. 6
2 TPS542941EVM Converter 1 Light Load Efficiency.................................................................... 6
3 TPS542941EVM Converter 2 Efficiency ................................................................................. 7
4 TPS542941EVM Converter 2 Light Load Efficiency.................................................................... 7
5 TPS542941EVM Converter 1 Load Regulation......................................................................... 8
6 TPS542941EVM Converter 2 Load Regulation......................................................................... 8
7 TPS542941EVM Converter 1 Line Regulation.......................................................................... 9
8 TPS542941EVM Converter 2 Line Regulation.......................................................................... 9
9 TPS542941EVM Converter 1 Load Transient Response ............................................................ 10
10 TPS542941EVM Converter 2 Load Transient Response ............................................................ 10
11 TPS542941EVM Converter 1 Output Voltage Ripple................................................................. 11
12 TPS542941EVM Converter 1 Eco-mode™ Output Voltage Ripple at No Load................................... 11
13 TPS542941EVM Converter 2 Output Voltage Ripple................................................................. 12
14 TPS542941EVM Converter 2 Eco-mode™ Output Voltage Ripple at No Load................................... 12
15 TPS542941EVM Input Voltage Ripple.................................................................................. 13
SWIFT, Eco-mode, D-CAP2 are trademarks of Texas Instruments.
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SLVU768–August 2012 TPS542941 Dual Channel SWIFT™ Evaluation Module
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