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TPS549B22EVM-847, 25-A Single Synchronous Step-Down
Converter With Full Differential Sense and PMBus™
This user's guide describes the characteristics, operation, and use of the TPS549B22 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, TPS549B22EVM, and the term evaluation module are
synonymous with the TPS549B22EVM-847, unless otherwise noted.
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SLUUBN2 - March 2017
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List of Figures
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User's Guide
SLUUBN2 - March 2017
Full Differential Sense and PMBus™
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Summary of Contents for Texas Instruments TPS549B22EVM-847
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Page 1: Table Of Contents
(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, TPS549B22EVM, and the term evaluation module are synonymous with the TPS549B22EVM-847, unless otherwise noted. Contents ........................ -
Page 2: Sluubn2 – March
List of Test Points for Line and Load Measurements ............... List of Test Points for Efficiency Measurements ....................PWR847 List of Materials TPS549B22EVM-847, 25-A Single Synchronous Step-Down Converter With SLUUBN2 – March 2017 Full Differential Sense and PMBus™ Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated... -
Page 3: Introduction
The following warnings and cautions are noted for the safety of anyone using or working close to the TPS549B22EVM-847. Observe all safety precautions. Warning The TPS549B22EVM-847 circuit module may become hot during operation due to dissipation of heat. Avoid contact with the board. Follow all applicable safety procedures applicable to your laboratory. -
Page 4: Description
• Convenient test points for probing critical waveforms • PMBus™ connector for easy connection with the TI USB adapter TPS549B22EVM-847, 25-A Single Synchronous Step-Down Converter With SLUUBN2 – March 2017 Full Differential Sense and PMBus™ Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated... -
Page 5: Evm Electrical Performance Specifications
= 12 V, I = 12 A, F = 650 kHz Operating temperature ºC oper SLUUBN2 – March 2017 TPS549B22EVM-847, 25-A Single Synchronous Step-Down Converter With Full Differential Sense and PMBus™ Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated... -
Page 6: Schematic
37.4k 42.2k 25.5k AGND Copyright © 2017, Texas Instruments Incorporated AGND Figure 1. PWR-847EVM Schematic TPS549B22EVM-847, 25-A Single Synchronous Step-Down Converter With Full SLUUBN2 – March 2017 Differential Sense and PMBus™ Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated... -
Page 7: Test Setup
The Fusion Digital Power Designer is the graphical user interface (GUI) used to configure and monitor the Texas Instruments TPS549B22 power converter installed on this evaluation module. The application uses the PMBus protocol to communicate with the controller over serial bus by way of a TI USB adapter. This adapter can be purchased at http://www.ti.com/tool/usb-to-gpio. -
Page 8: Test Equipment
This recommended wire gauge and length should achieve a voltage drop of no more than 0.2 V at the maximum 25-A load. TPS549B22EVM-847, 25-A Single Synchronous Step-Down Converter With SLUUBN2 – March 2017 Full Differential Sense and PMBus™... -
Page 9: Pwr-847Evm
PWR-847EVM overview, tip and barrel measurement. Figure 2. PWR-847EVM Overview Metal Ground Barrel Probe Figure 3. Tip and Barrel Measurement SLUUBN2 – March 2017 TPS549B22EVM-847, 25-A Single Synchronous Step-Down Converter With Full Differential Sense and PMBus™ Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated... -
Page 10: Evm And Usb Interface Adapter
Figure 4 illustrates the EVM and USB interface adapter. Figure 4. EVM and USB Interface Adapter TPS549B22EVM-847, 25-A Single Synchronous Step-Down Converter With SLUUBN2 – March 2017 Full Differential Sense and PMBus™ Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated... -
Page 11: List Of Test Points, Jumpers, And Switch
SMB_ALRT# Alert output for the PMBus interface. 2-pin jumper CNTL Shunts control pin to GND SLUUBN2 – March 2017 TPS549B22EVM-847, 25-A Single Synchronous Step-Down Converter With Full Differential Sense and PMBus™ Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated... -
Page 12: Evm Configuration Using The Fusion Gui
EVM prior to launching the software so that the TPS549B22 installed is active and able to respond to the GUI and the GUI can recognize the device. TPS549B22EVM-847, 25-A Single Synchronous Step-Down Converter With SLUUBN2 – March 2017 Full Differential Sense and PMBus™... -
Page 13: Test Procedure
2. Reduce input voltage to 0 V. 3. Shut down the external fan if in use. 4. Shut down equipment. SLUUBN2 – March 2017 TPS549B22EVM-847, 25-A Single Synchronous Step-Down Converter With Full Differential Sense and PMBus™ Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated... -
Page 14: Performance Data And Typical Characteristic Curves
= 18 V Load Current (A) D002 Figure 6. Power Loss vs Output Current SKIP Mode TPS549B22EVM-847, 25-A Single Synchronous Step-Down Converter With SLUUBN2 – March 2017 Full Differential Sense and PMBus™ Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated... -
Page 15: 11.3 Line Regulation
Figure 7. Line Regulation of 1-V Output Figure 8. PMBus V Step-Up = 0.6 V to 1.2 V at 0 A SLUUBN2 – March 2017 TPS549B22EVM-847, 25-A Single Synchronous Step-Down Converter With Full Differential Sense and PMBus™ Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated... -
Page 16: Out Step-Up = 0.6 V To 1.2 V At 25 A
Step-Down = 1.2 V to 0.6 V at 0 A Figure 10. PMBus V Step-Up = 0.6 V to 1.2 V at 25 A TPS549B22EVM-847, 25-A Single Synchronous Step-Down Converter With SLUUBN2 – March 2017 Full Differential Sense and PMBus™... -
Page 17: Pmbus Multiple Commands
Step-Down = 1.2 V to 0.6 V at 25 A Figure 12. PMBUS Multiple Commands SLUUBN2 – March 2017 TPS549B22EVM-847, 25-A Single Synchronous Step-Down Converter With Full Differential Sense and PMBus™ Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated... -
Page 18: Transient Response
Step is 15 A at 40 A/µs 11.5 Output Ripple Figure 14. Output Ripple and SW Node of 1-V Output at 12 V , 25-A Output TPS549B22EVM-847, 25-A Single Synchronous Step-Down Converter With SLUUBN2 – March 2017 Full Differential Sense and PMBus™ Submit Documentation Feedback... -
Page 19: Control On
11.6 Control On Figure 16. Start up from Control, 1-V Output at 12 V , 0-A Output SLUUBN2 – March 2017 TPS549B22EVM-847, 25-A Single Synchronous Step-Down Converter With Full Differential Sense and PMBus™ Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated... -
Page 20: Control Off
, 10-A Output 11.7 Control Off Figure 18. Start-Up and Shutdown, 1-V Output at 12 V , 0.5-A Output TPS549B22EVM-847, 25-A Single Synchronous Step-Down Converter With SLUUBN2 – March 2017 Full Differential Sense and PMBus™ Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated... -
Page 21: Thermal Image
Figure 19. Thermal Image at 1-V Output at 12 V , 25-A Output, 650 kHz at 25°C Ambient SLUUBN2 – March 2017 TPS549B22EVM-847, 25-A Single Synchronous Step-Down Converter With Full Differential Sense and PMBus™ Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated... -
Page 22: Fusion Gui
Figure 20. First Window at Fusion Launch Figure 21. Scan Finds Device Successfully Figure 22. Software Launch Continued Figure 23. Software Launch Continued TPS549B22EVM-847, 25-A Single Synchronous Step-Down Converter With SLUUBN2 – March 2017 Full Differential Sense and PMBus™ Submit Documentation Feedback... -
Page 23: First Screen After Successful Launch Configure: Limits And On/Off
VOUT Margin • Operation Figure 24. First Screen After Successful Launch Configure: Limits and On/Off SLUUBN2 – March 2017 TPS549B22EVM-847, 25-A Single Synchronous Step-Down Converter With Full Differential Sense and PMBus™ Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated... -
Page 24: Configure: Frequency- Fs Configuration Pop-Up
Changing the frequency prompts a pop-up window with details of the options Figure 25). Figure 25. Configure: Frequency- FS Configuration Pop-up TPS549B22EVM-847, 25-A Single Synchronous Step-Down Converter With SLUUBN2 – March 2017 Full Differential Sense and PMBus™ Submit Documentation Feedback... -
Page 25: Configure: Frequency- Fs Config Pop-Up With Change
When Store Config to NVM is selected, change is committed to nonvolatile memory and becomes the new default (Figure 26). Figure 26. Configure: Frequency- FS Config Pop-Up with Change SLUUBN2 – March 2017 TPS549B22EVM-847, 25-A Single Synchronous Step-Down Converter With Full Differential Sense and PMBus™ Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated... -
Page 26: Configure: Store Config To Nvm
(Figure 27). Figure 27. Configure: Store Config to NVM TPS549B22EVM-847, 25-A Single Synchronous Step-Down Converter With SLUUBN2 – March 2017 Full Differential Sense and PMBus™ Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated... -
Page 27: Change View Screen To Monitor Screen
Configure, Monitor and Status as needed (Figure 28). Figure 28. Change View Screen to Monitor Screen SLUUBN2 – March 2017 TPS549B22EVM-847, 25-A Single Synchronous Step-Down Converter With Full Differential Sense and PMBus™ Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated... -
Page 28: System Dashboard
Selecting System Dashboard from mid-left screen adds a new window which displays system-level information (Figure 29). Figure 29. System Dashboard TPS549B22EVM-847, 25-A Single Synchronous Step-Down Converter With SLUUBN2 – March 2017 Full Differential Sense and PMBus™ Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated... -
Page 29: Status Screen
Selecting Status from lower left corner shows the status of the controller (Figure 30). Figure 30. Status Screen SLUUBN2 – March 2017 TPS549B22EVM-847, 25-A Single Synchronous Step-Down Converter With Full Differential Sense and PMBus™ Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated... -
Page 30: Store Configuration To Memory
Store Config to NVM button from the configure screen. It results in committing the current configuration to nonvolatile memory (Figure 31). Figure 31. Store Configuration To Memory TPS549B22EVM-847, 25-A Single Synchronous Step-Down Converter With SLUUBN2 – March 2017 Full Differential Sense and PMBus™ Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated... -
Page 31: Pmbus Logging
See next screen (Figure 33). Figure 32. PMBus Logging SLUUBN2 – March 2017 TPS549B22EVM-847, 25-A Single Synchronous Step-Down Converter With Full Differential Sense and PMBus™ Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated... -
Page 32: Pmbus Log Details
(as Stop Logging). This file can rapidly grow in size, so caution is advised when using this function. Figure 33. PMBus Log Details TPS549B22EVM-847, 25-A Single Synchronous Step-Down Converter With SLUUBN2 – March 2017 Full Differential Sense and PMBus™... -
Page 33: Evm Assembly Drawing And Pcb Layout
Figure 34. PWR-847EVM Top Layer Assembly Drawing (Top View) Figure 35. PWR-847EVM Top Solder Mask (Top View) SLUUBN2 – March 2017 TPS549B22EVM-847, 25-A Single Synchronous Step-Down Converter With Full Differential Sense and PMBus™ Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated... -
Page 34: Pwr-847Evm Top Layer (Top View)
EVM Assembly Drawing and PCB Layout www.ti.com Figure 36. PWR-847EVM Top Layer (Top View) Figure 37. PWR-847EVM Inner Layer 1 (Top View) TPS549B22EVM-847, 25-A Single Synchronous Step-Down Converter With SLUUBN2 – March 2017 Full Differential Sense and PMBus™ Submit Documentation Feedback... -
Page 35: Pwr-847Evm Inner Layer 2 (Top View)
Figure 38. PWR-847EVM Inner Layer 2 (Top View) Figure 39. PWR-847EVM Inner Layer 3 (Top View) SLUUBN2 – March 2017 TPS549B22EVM-847, 25-A Single Synchronous Step-Down Converter With Full Differential Sense and PMBus™ Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated... -
Page 36: Pwr-847Evm Inner Layer 4 (Top View)
EVM Assembly Drawing and PCB Layout www.ti.com Figure 40. PWR-847EVM Inner Layer 4 (Top View) Figure 41. PWR-847EVM Bottom Layer (Top View) TPS549B22EVM-847, 25-A Single Synchronous Step-Down Converter With SLUUBN2 – March 2017 Full Differential Sense and PMBus™ Submit Documentation Feedback... -
Page 37: Pwr-847Evm Bottom Solder Mask (Top View)
Figure 42. PWR-847EVM Bottom Solder Mask (Top View) Figure 43. PWR-847EVM Bottom Overlay Layer (Top View) SLUUBN2 – March 2017 TPS549B22EVM-847, 25-A Single Synchronous Step-Down Converter With Full Differential Sense and PMBus™ Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated... -
Page 38: List Of Materials
RES, 42.2 k, 1%, 0.1 W, 0603 0603 CRCW060342K2FKEA Vishay-Dale 25.5k RES, 25.5 k, 1%, 0.1 W, 0603 0603 CRCW060325K5FKEA Vishay-Dale TPS549B22EVM-847, 25-A Single Synchronous Step-Down Converter With Full SLUUBN2 – March 2017 Differential Sense and PMBus™ Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated... - Page 39 Vishay-Dale Notes: Unless otherwise noted in the Alternate Part Number or Alternate Manufacturer columns, all parts may be substituted with equivalents. SLUUBN2 – March 2017 TPS549B22EVM-847, 25-A Single Synchronous Step-Down Converter With Full Differential Sense and PMBus™ Submit Documentation Feedback...
- Page 40 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 41 FCC Interference Statement for Class B EVM devices NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
- Page 42 【無線電波を送信する製品の開発キットをお使いになる際の注意事項】 開発キットの中には技術基準適合証明を受けて いないものがあります。 技術適合証明を受けていないもののご使用に際しては、電波法遵守のため、以下のいずれかの 措置を取っていただく必要がありますのでご注意ください。 1. 電波法施行規則第6条第1項第1号に基づく平成18年3月28日総務省告示第173号で定められた電波暗室等の試験設備でご使用 いただく。 2. 実験局の免許を取得後ご使用いただく。 3. 技術基準適合証明を取得後ご使用いただく。 なお、本製品は、上記の「ご使用にあたっての注意」を譲渡先、移転先に通知しない限り、譲渡、移転できないものとします。 上記を遵守頂けない場合は、電波法の罰則が適用される可能性があることをご留意ください。 日本テキサス・イ ンスツルメンツ株式会社 東京都新宿区西新宿６丁目２４番１号 西新宿三井ビル 3.3.3 Notice for EVMs for Power Line Communication: Please see http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_02.page 電力線搬送波通信についての開発キットをお使いになる際の注意事項については、次のところをご覧ください。http:/ /www.tij.co.jp/lsds/ti_ja/general/eStore/notice_02.page 3.4 European Union 3.4.1 For EVMs subject to EU Directive 2014/30/EU (Electromagnetic Compatibility Directive): This is a class A product intended for use in environments other than domestic environments that are connected to a low-voltage power-supply network that supplies buildings used for domestic purposes.
- Page 43 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 © 2017, Texas Instruments Incorporated...
- Page 44 IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES Texas Instruments Incorporated (‘TI”) technical, application or other design advice, services or information, including, but not limited to, reference designs and materials relating to evaluation modules, (collectively, “TI Resources”) are intended to assist designers who are developing applications that incorporate TI products;...
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