Texas Instruments TPS54386EVM, User Manual

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User’s Guide
TPS54x86 Step-Down Converter Evaluation Module User's
Guide
Table of Contents
1 Introduction ............................................................................................................................................................................. 2
1.1 Description......................................................................................................................................................................... 2
1.2 Applications........................................................................................................................................................................ 2
1.3 Features............................................................................................................................................................................. 2
2 TPS54386EVM Electrical Performance Specifications ........................................................................................................ 3
3 Schematic ................................................................................................................................................................................ 4
3.1 Sequencing Jump (JP3)..................................................................................................................................................... 5
3.2 Enable Jumpers (JP1 and JP2)......................................................................................................................................... 5
3.3 Test Point Descriptions....................................................................................................................................................... 5
4 4 Test Set Up ........................................................................................................................................................................... 7
4.1 Equipment.......................................................................................................................................................................... 7
4.2 Equipment Setup................................................................................................................................................................ 8
4.3 Start Up / Shut Down Procedure...................................................................................................................................... 10
4.4 Output Ripple Voltage Measurement Procedure.............................................................................................................. 10
4.5 Control Loop Gain and Phase Measurement Procedure................................................................................................. 10
4.6 Equipment Shutdown....................................................................................................................................................... 10
5 TPS54386EVM Typical Performance Data and Characteristic Curves ............................................................................. 11
5.1 Efficiency.......................................................................................................................................................................... 11
5.2 Line and Load Regulation................................................................................................................................................ 12
5.3 Output Voltage Ripple...................................................................................................................................................... 12
5.4 Switch Node..................................................................................................................................................................... 13
5.5 Control Loop Bode Plot (low line, V
IN
= 8 V).................................................................................................................... 13
6 EVM Assembly Drawings and Layout ................................................................................................................................. 14
7 List of Materials ..................................................................................................................................................................... 17
8 Revision History ................................................................................................................................................................... 17
List of Figures
Figure 3-1. TPS54386EVM Schematic........................................................................................................................................ 4
Figure 4-1. TPS54386EVM Recommended Test Set-Up............................................................................................................ 8
Figure 4-2. Tip and Barrel Measurement Technique (output ripple measurement using TP3 and TP4 or TP18 and TP19)....... 9
Figure 4-3. Control Loop Measurement Setup............................................................................................................................ 9
Figure 5-1. TPS54386EVM Efficiency verse Load Current V
IN
=9.6-13.2 V, V
OUT1
= 5.0 V I
OUT1
= 0-2 A, V
OUT2
= 3.3 V
I
OUT2
= 0-2 A........................................................................................................................................................................... 11
Figure 5-2. TPS54386EVM Output Voltage verse Load Current V
IN
=9.6-13.2 V, V
OUT1
= 5.0 V I
OUT1
= 0-2 A, V
OUT2
=
3.3 V I
OUT2
= 0-2 A................................................................................................................................................................. 12
Figure 5-3. TPS54386EVM Output Voltage Ripple (V
IN
= 13.2 V, I
OUT1
= I
OUT2
= 2 A)............................................................. 12
Figure 5-4. TPS54386EVM Switching Waveforms V
IN
= 12 V, I
OUT
= 2 A Ch1: TP9 (SW1), Ch2: TP12 (SW2)....................... 13
Figure 5-5. TPS54386EVM Gain and Phase vs Frequency...................................................................................................... 13
Figure 6-1. TPS54386EVM Component Placement (viewed from top)..................................................................................... 14
Figure 6-2. TPS54386EVM Top Copper (viewed from top)....................................................................................................... 15
Figure 6-3. TPS54386EVM Bottom Copper (x-ray view from top)............................................................................................. 16
List of Tables
Table 2-1. Electrical Performance Specifications......................................................................................................................... 3
Table 3-1. Test Point Descriptions............................................................................................................................................... 5
Table 7-1. TPS54386EVM List of Materials............................................................................................................................... 17
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