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User's Guide
TPS54x86 Step-Down Converter Evaluation Module User's
Guide
1
Introduction.............................................................................................................................................................................2
1.1 Description.........................................................................................................................................................................
1.2
Applications........................................................................................................................................................................2
1.3 Features.............................................................................................................................................................................
3
Schematic................................................................................................................................................................................4
(JP3).....................................................................................................................................................5
3.2 Enable Jumpers (JP1 and JP2).........................................................................................................................................
Descriptions.......................................................................................................................................................5
4 4 Test Set Up...........................................................................................................................................................................
4.1 Equipment..........................................................................................................................................................................
Setup................................................................................................................................................................8
4.5 Control Loop Gain and Phase Measurement Procedure.................................................................................................
4.6 Equipment Shutdown.......................................................................................................................................................
5.1 Efficiency..........................................................................................................................................................................
5.2 Line and Load Regulation................................................................................................................................................
5.3 Output Voltage Ripple......................................................................................................................................................
5.4 Switch Node.....................................................................................................................................................................
5.5 Control Loop Bode Plot (low line, V
Materials.....................................................................................................................................................................17
8 Revision History...................................................................................................................................................................
Figure 4-1. TPS54386EVM Recommended Test Set-Up............................................................................................................
Figure 4-3. Control Loop Measurement Setup............................................................................................................................
I
= 0-2
A...........................................................................................................................................................................11
OUT2
3.3 V I
= 0-2 A.................................................................................................................................................................
OUT2
Figure 5-5. TPS54386EVM Gain and Phase vs Frequency......................................................................................................
Figure 6-1. TPS54386EVM Component Placement (viewed from top).....................................................................................
Figure 6-2. TPS54386EVM Top Copper (viewed from top).......................................................................................................
Table 3-1. Test Point Descriptions...............................................................................................................................................
Table 7-1. TPS54386EVM List of Materials...............................................................................................................................
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SLUU286A - MARCH 2008 - REVISED OCTOBER 2021
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Table of Contents
Specifications........................................................................................................3
Procedure......................................................................................................................................10
Procedure..............................................................................................................10
= 8 V)....................................................................................................................
IN
Layout.................................................................................................................................14
List of Figures
Schematic........................................................................................................................................4
IN
List of Tables
Specifications.........................................................................................................................3
Copyright © 2021 Texas Instruments Incorporated
Curves.............................................................................11
=9.6-13.2 V, V
= 5.0 V I
IN
OUT1
=9.6-13.2 V, V
= 5.0 V I
IN
OUT1
= 2 A).............................................................
= 2 A Ch1: TP9 (SW1), Ch2: TP12 (SW2).......................
top).............................................................................................16
TPS54x86 Step-Down Converter Evaluation Module User's Guide
Table of Contents
= 0-2 A, V
= 3.3 V
OUT1
OUT2
= 0-2 A, V
=
OUT1
OUT2
2
2
5
7
7
10
10
11
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12
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9
9
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Summary of Contents for Texas Instruments TPS54386EVM
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Page 1: Table Of Contents
= 0-2 A, V = 3.3 V OUT1 OUT1 OUT2 = 0-2 A...................................11 OUT2 Figure 5-2. TPS54386EVM Output Voltage verse Load Current V =9.6-13.2 V, V = 5.0 V I = 0-2 A, V OUT1 OUT1 OUT2 3.3 V I = 0-2 A................................. -
Page 2: Introduction
TPS54386EVM is designed to use a regulated 12-V (+10% / -20%) bus to produce two regulated power rails, 5.0 V and 3.3 V at up to 2 A of load current each. TPS54386EVM is designed to demonstrate the TPS54386 in a typical 12-V bus system while providing a number of test points to evaluate the performance of the TPS54386 in a given application. -
Page 3: Tps54386Evm Electrical Performance Specifications
TPS54386EVM Electrical Performance Specifications 2 TPS54386EVM Electrical Performance Specifications Table 2-1. Electrical Performance Specifications SYMBOL PARAMETER UNITS Input Characterstics Input coltage 13.2 Input current = nom, I = max No load input current = nom, I = 0 A... -
Page 4: Schematic
Figure 3-1. TPS54386EVM Schematic Note For reference only, see Table 7-1, List of Materials for specific values. TPS54x86 Step-Down Converter Evaluation Module User's Guide SLUU286A – MARCH 2008 – REVISED OCTOBER 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 5: Sequencing Jump (Jp3)
Schematic 3.1 Sequencing Jump (JP3) The TPS54386EVM provides a 3-pin, 100-mil header and shunt for programming the TPS54386’s sequencing function. Placing the JP3 shunt in the left position connects the sequence pin to BP and sets the TPS54386 controller to sequence Channel 2 prior to Channel 1 when Enable 2 is activated. Placing the JP3 shunt in the right position connects the sequence pin to GND and sets the TPS54386 converter to sequence Channel 1 prior to Channel 1 when Enable 1 is activated. - Page 6 3.3.4 Channel 1 Switching Waveforms (TP9 and TP10) TPS54386EVM provides a test point and a local ground connection (TP10) for the monitoring of the Channel 1 power stage switching waveform. Connect an oscilloscope probe to TP9 to monitor the switch node voltage for Channel 1.
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Page 7: 4 Test Set Up
The EVM should not be left unattended while powered. The EVM should not be probed while the fan is not running. SLUU286A – MARCH 2008 – REVISED OCTOBER 2021 TPS54x86 Step-Down Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 8: Equipment Setup
4.2 Equipment Setup Shown in Figure 4-1 is the basic test set up recommended to evaluate the TPS54386EVM. Please note that although the return for J1, J2 and JP3 are the same system ground, the connections should remain separate as shown in Figure 4-1 4.2.1 Procedure... -
Page 9: Figure 4-2. Tip And Barrel Measurement Technique (Output Ripple Measurement Using Tp3 And Tp4 Or Tp18 And Tp19)
TP18 and TP19) LOAD2 3.3V @ LOAD1 5.0V @ Isolation Transformer Figure 4-3. Control Loop Measurement Setup SLUU286A – MARCH 2008 – REVISED OCTOBER 2021 TPS54x86 Step-Down Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 10: Start Up / Shut Down Procedure
1. Shut down oscilloscope 2. Shut down VIN 3. Shut down LOAD1 4. Shut down fan TPS54x86 Step-Down Converter Evaluation Module User's Guide SLUU286A – MARCH 2008 – REVISED OCTOBER 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 11: Tps54386Evm Typical Performance Data And Characteristic Curves
Figure 5-1 through Figure 5-5 present typical performance curves for the TPS54386EVM. Since actual performance data can be affected by measurement techniques and environmental variables, these curves are presented for reference and may differ from actual field measurements. 5.1 Efficiency EFFICIENCY(V = 3.3 V) -
Page 12: Line And Load Regulation
1.24 1.62 2.00 - Load Current - A - Load Current - A LOAD LOAD Figure 5-2. TPS54386EVM Output Voltage verse Load Current V =9.6-13.2 V, V = 5.0 V I = 0-2 A, OUT1 OUT1 = 3.3 V I... -
Page 13: Switch Node
1000 1000 f - Frequency - Hz f - Frequency - Hz Figure 5-5. TPS54386EVM Gain and Phase vs Frequency SLUU286A – MARCH 2008 – REVISED OCTOBER 2021 TPS54x86 Step-Down Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 14: Evm Assembly Drawings And Layout
Figure 6-3) show the design of the TPS54386EVM printed circuit board. The EVM has been designed using a 4-Layer, 2-oz copper-clad circuit board 3.0” x 3.0” with all components in a 1.15” x 2.15” active area on the top side and all active traces to the top and bottom layers to allow the user to easily view, probe and evaluate the TPS54386 control device in a practical double-sided application. -
Page 15: Figure 6-2. Tps54386Evm Top Copper (Viewed From Top)
EVM Assembly Drawings and Layout Figure 6-2. TPS54386EVM Top Copper (viewed from top) SLUU286A – MARCH 2008 – REVISED OCTOBER 2021 TPS54x86 Step-Down Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 16: Figure 6-3. Tps54386Evm Bottom Copper (X-Ray View From Top)
EVM Assembly Drawings and Layout www.ti.com Figure 6-3. TPS54386EVM Bottom Copper (x-ray view from top) TPS54x86 Step-Down Converter Evaluation Module User's Guide SLUU286A – MARCH 2008 – REVISED OCTOBER 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 17: List Of Materials
List of Materials 7 List of Materials Table 7-1. TPS54386EVM List of Materials REF DES DESCRIPTION PART NUMBER Capacitor, aluminum, 25 V, ±20%, 100 μF, 0.328 x 0.390 Panasonic EEEFC1E101P inch C10, C11 Capacitor, ceramic, 25 V, X5R, 20%, 10 μF, 1210 C3216X5R1E106M Capacitor, ceramic, 10 V, X5R, 20%, 4.7 μF, 0805... - Page 18 STANDARD TERMS FOR EVALUATION MODULES Delivery: TI delivers TI evaluation boards, kits, or modules, including any accompanying demonstration software, components, and/or documentation which may be provided together or separately (collectively, an “EVM” or “EVMs”) to the User (“User”) in accordance with the terms set forth herein.
- Page 19 www.ti.com Regulatory Notices: 3.1 United States 3.1.1 Notice applicable to EVMs not FCC-Approved: FCC NOTICE: This kit is designed to allow product developers to evaluate electronic components, circuitry, or software associated with the kit to determine whether to incorporate such items in a finished product and software developers to write software applications for use with the end product.
- Page 20 www.ti.com Concernant les EVMs avec antennes détachables Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec une antenne d'un type et d'un gain maximal (ou inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire les risques de brouillage radioélectrique à...
- Page 21 www.ti.com EVM Use Restrictions and Warnings: 4.1 EVMS ARE NOT FOR USE IN FUNCTIONAL SAFETY AND/OR SAFETY CRITICAL EVALUATIONS, INCLUDING BUT NOT LIMITED TO EVALUATIONS OF LIFE SUPPORT APPLICATIONS. 4.2 User must read and apply the user guide and other available documentation provided by TI regarding the EVM prior to handling or using the EVM, including without limitation any warning or restriction notices.
- Page 22 Notwithstanding the foregoing, any judgment may be enforced in any United States or foreign court, and TI may seek injunctive relief in any United States or foreign court. Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2019, Texas Instruments Incorporated...
- Page 23 TI products. TI’s provision of these resources does not expand or otherwise alter TI’s applicable warranties or warranty disclaimers for TI products. TI objects to and rejects any additional or different terms you may have proposed. IMPORTANT NOTICE Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2021, Texas Instruments Incorporated...
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