Texas Instruments TPS53126EVM-600, User Manual

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User’s Guide
TPS53126 Buck Controller Evaluation Module User's
Guide
ABSTRACT
The TPS53126EVM-600 Evaluation Module presents an easy-to-use reference design for a common, dual-
output power supply using the TPS53126 controller in cost-sensitive applications.
Table of Contents
1 Introduction ............................................................................................................................................................................. 3
1.1 Description......................................................................................................................................................................... 3
1.2 Applications........................................................................................................................................................................ 3
1.3 Features............................................................................................................................................................................. 3
2 Electrical Performance Specifications ................................................................................................................................. 4
3 Schematic ................................................................................................................................................................................ 5
4 Connector and Test Point Descriptions ................................................................................................................................ 6
4.1 Enable Switches – SW1 and SW2..................................................................................................................................... 6
4.2 Switching Frequency Select Switch – SW3....................................................................................................................... 6
4.3 Test Point Descriptions....................................................................................................................................................... 6
5 Test Setup ................................................................................................................................................................................ 8
5.1 Equipment.......................................................................................................................................................................... 8
5.2 Recommended Setup........................................................................................................................................................ 8
6 Test Procedure ...................................................................................................................................................................... 10
6.1 Start-up Procedure........................................................................................................................................................... 10
6.2 Line/Load Regulation and Efficiency Measurement Procedure....................................................................................... 10
6.3 Output Ripple Voltage Measurement Procedure.............................................................................................................. 10
6.4 Shutdown Procedure........................................................................................................................................................ 10
7 Performance Data and Typical Characteristic Curves ....................................................................................................... 11
7.1 Efficiency.......................................................................................................................................................................... 11
7.2 Line and Load Regulation................................................................................................................................................ 12
7.3 Output Voltage Ripple...................................................................................................................................................... 13
7.4 Switch Node Waveforms.................................................................................................................................................. 14
8 EVM Assembly Drawings and Layout ................................................................................................................................. 15
9 Bill of Materials ..................................................................................................................................................................... 18
10 Revision History ................................................................................................................................................................. 19
List of Figures
Figure 3-1. TPS53126EVM-600 Schematic................................................................................................................................. 5
Figure 4-1. Tip and Barrel Measurement for Output Voltage Ripple............................................................................................ 7
Figure 5-1. TPS53126EVM-600 Recommended Test Setup....................................................................................................... 9
Figure 7-1. Efficiency vs Load (V
IN
= 8 V–22 V, V
OUT1
= 1.05 V, I
OUT1
= 0 A–4 A).................................................................... 11
Figure 7-2. Efficiency vs Load (V
IN
= 8 V–22 V, V
OUT2
= 1.8 V, I
OUT2
= 0 A–4 A)...................................................................... 11
Figure 7-3. Output Voltage vs Load (V
IN
= 8 V–22 V, V
OUT1
= 1.05 V, I
OUT1
= 0 A–4 A)........................................................... 12
Figure 7-4. Output Voltage vs Load (V
IN
= 8 V–22 V, V
OUT2
= 1.8 V, I
OUT2
= 0 A–4 A)............................................................. 12
Figure 7-5. Output Voltage Ripple (V
IN
= 12 V, V
OUT1
= 1.05 V, I
OUT1
= 4 A, F
SW
= 350 kHz).................................................. 13
Figure 7-6. Output Voltage Ripple (V
IN
= 12 V, V
OUT2
= 1.8 V, I
OUT2
= 4 A, F
SW
= 350 kHz).................................................... 13
Figure 7-7. Switching Waveform (V
IN
= 12 V, V
OUT1
= 1.05 V, I
OUT1
= 4 A, F
SW
= 350 kHz)..................................................... 14
Figure 7-8. Switching Waveform (V
IN
= 12 V, V
OUT2
= 1.08 V, I
OUT2
= 4 A, F
SW
= 350 kHz)..................................................... 14
Figure 8-1. Top Assembly.......................................................................................................................................................... 15
Figure 8-2. Bottom Assembly.................................................................................................................................................... 15
Figure 8-3. Top Layer................................................................................................................................................................. 16
Figure 8-4. Bottom Layer........................................................................................................................................................... 16
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SLVU435A – FEBRUARY 2011 – REVISED JANUARY 2022
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