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User's Guide
TPS56221 Step-Down Converter Evaluation Module User's
Guide
1
Introduction.............................................................................................................................................................................3
2 Description..............................................................................................................................................................................
2.1
Applications........................................................................................................................................................................4
2.2 Features.............................................................................................................................................................................
3 Electrical Performance Specifications.................................................................................................................................
4
Schematic................................................................................................................................................................................6
Setup................................................................................................................................................................................7
5.1 Test Equipment..................................................................................................................................................................
5.3 Equipment Set Up Procedure............................................................................................................................................
6 Configurations........................................................................................................................................................................
6.1 Enable Selection (J3).........................................................................................................................................................
7 Test Point Descriptions........................................................................................................................................................
7.2 Output Voltage Monitoring (TP3 and TP4).......................................................................................................................
7.4 Power Good Monitoring (TP6).........................................................................................................................................
7.6 Switch Node Voltage Monitoring (TP11 and TP12)..........................................................................................................
8 Test Procedures....................................................................................................................................................................
8.1 Start Up/Shut Down Procedure........................................................................................................................................
8.2 Output Ripple Voltage Measurement Procedure..............................................................................................................
8.3 Control Loop Gain and Phase Measurement Procedure.................................................................................................
8.4 Equipment Shutdown.......................................................................................................................................................
9 Performance Data and Typical Characteristic Curves......................................................................................................
9.1
Efficiency..........................................................................................................................................................................13
9.2 Load Regulation...............................................................................................................................................................
9.3 Line Regulation................................................................................................................................................................
9.4 Output Voltage Ripple......................................................................................................................................................
9.5 Switch Node.....................................................................................................................................................................
9.6 Load Transient.................................................................................................................................................................
9.7 Start Up............................................................................................................................................................................
9.8 Power Off.........................................................................................................................................................................
9.9 Over-Current Protection...................................................................................................................................................
9.10 Control Loop Bode Plot..................................................................................................................................................
9.11 Thermal Image...............................................................................................................................................................
10 EVM Assembly Drawings and PCB Layout......................................................................................................................
Materials...................................................................................................................................................................22
12 Revision History.................................................................................................................................................................
Figure 5-1. TPS56221EVM-579 Recommended Test Setup.......................................................................................................
Figure 8-1. Tip and Barrel Output Voltage Ripple Measurement...............................................................................................
Figure 8-2. Control Loop Measurement Setup..........................................................................................................................
Figure 9-1. Efficiency.................................................................................................................................................................
Figure 9-2. Load Regulation......................................................................................................................................................
Figure 9-3. Line Regulation (VIN = 8 V to 14 V, VOUT = 1.0 V, IOUT = 25 A)..........................................................................
Figure 9-4. Output Voltage Ripple (VIN = 12 V, VOUT = 1.0 V, IOUT = 25
SLVU446B - MARCH 2011 - REVISED JULY 2021
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Gauge...............................................................................................................................................7
TP2)..........................................................................................................................10
(TP5)...................................................................................................................................10
TP10)........................................................................................................10
List of Figures
Schematic.................................................................................................................................6
Copyright © 2021 Texas Instruments Incorporated
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TPS56221 Step-Down Converter Evaluation Module User's Guide
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Related Manuals for Texas Instruments TPS56221EVM-579
Summary of Contents for Texas Instruments TPS56221EVM-579
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Page 1: Table Of Contents
Materials...................................22 12 Revision History................................. List of Figures Figure 4-1. TPS56221EVM-579 Schematic..........................6 Figure 5-1. TPS56221EVM-579 Recommended Test Setup....................... Figure 8-1. Tip and Barrel Output Voltage Ripple Measurement....................Figure 8-2. Control Loop Measurement Setup.......................... Figure 9-1. Efficiency................................. Figure 9-2. Load Regulation..............................Figure 9-3. Line Regulation (VIN = 8 V to 14 V, VOUT = 1.0 V, IOUT = 25 A)................ - Page 2 48°)......18 Figure 9-12. Thermal Image (VIN = 14 V, VOUT = 1.0 V, IOUT = 25 A, without airflow)............18 Figure 10-1. TPS56221EVM-579 Top Assembly Drawing (top view)..................Figure 10-2. TPS56221EVM-579 Bottom Assembly Drawing (bottom view)................19 Figure 10-3. TPS56221EVM-579 Top Copper (top view)......................
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Page 3: Introduction
1 Introduction The TPS56221EVM-579 evaluation module (EVM) is a synchronous buck converter providing a fixed 1.0-V output at up to 25 A from a 12-V input bus. The EVM is designed to start up from a single supply; so, no additional bias voltage is required for start up. -
Page 4: Description
2 Description TPS56221EVM-579 is designed to use a regulated 12-V (8-V to 14-V) bus voltage to provide a regulated 1.0-V output at up to 25 A of load current. TPS56221EVM-579 is designed to demonstrate the TPS56221 high-current integrated FET converter in a typical space-limited, 12-V bus to low-voltage point-of-load application. -
Page 5: Electrical Performance Specifications
Electrical Performance Specifications 3 Electrical Performance Specifications Table 3-1. TPS56221EVM-579 Electrical Performance Specifications PARAMETER TEST CONDITIONS UNIT Input Characteristics Input voltage Input current VIN = 12 V, IOUT = 25 A 2.42 No load input current VIN = 12 V, IOUT = 0 A... -
Page 6: Schematic
Schematic www.ti.com 4 Schematic Figure 4-1. TPS56221EVM-579 Schematic TPS56221 Step-Down Converter Evaluation Module User's Guide SLVU446B – MARCH 2011 – REVISED JULY 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 7: Test Setup
5.2.1 VIN to J1 The connection between the source voltage (VIN) and J1 of TPS56221EVM-579 can carry as much as 4 A current. The minimum recommended wire size is AWG #16 with the total length of wire less than 2 feet (1 foot input, 1 foot return) 5.2.2 J2 to LOAD... -
Page 8: Equipment Set Up Procedure
Test Setup www.ti.com 5.3 Equipment Set Up Procedure Figure 5-1 is the recommended test setup to evaluate the TPS56221EVM-579. source LOAD 1.0V @ EXAS NSTRUMENTS Figure 5-1. TPS56221EVM-579 Recommended Test Setup 1. Working at an ESD workstation, make sure that any wrist straps, bootstraps and mats are connected referencing the user to earth ground before power is applied to the EVM. -
Page 9: Configurations
TPS56221 converter. Opening J3 enables the TPS56221 converter. Default setting: short to disable the converter. SLVU446B – MARCH 2011 – REVISED JULY 2021 TPS56221 Step-Down Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 10: Test Point Descriptions
7.1 Input Voltage Monitoring (TP1 and TP2) TPS56221EVM-579 provides two test points for measuring the input voltage applied to the module. This allows the user to measure the actual input module voltage without losses from input cables and connectors. To use TP1 and TP2, connect a voltmeter positive input terminal to TP1 and negative input terminal to TP2. -
Page 11: Test Procedures
Probe Tip Tip and Barrel V ripple measurement Figure 8-1. Tip and Barrel Output Voltage Ripple Measurement SLVU446B – MARCH 2011 – REVISED JULY 2021 TPS56221 Step-Down Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 12: Control Loop Gain And Phase Measurement Procedure
1. Shut down VIN. 2. Shut down LOAD. 3. Shut down fan. 4. Shut down oscilloscope. TPS56221 Step-Down Converter Evaluation Module User's Guide SLVU446B – MARCH 2011 – REVISED JULY 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 13: Performance Data And Typical Characteristic Curves
Figure 9-1 through Figure 9-12 present typical performance curves for the TPS56221EVM-579. 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. 9.1 Efficiency... -
Page 14: Line Regulation
Figure 9-4. Output Voltage Ripple (VIN = 12 V, VOUT = 1.0 V, IOUT = 25 A) TPS56221 Step-Down Converter Evaluation Module User's Guide SLVU446B – MARCH 2011 – REVISED JULY 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 15: Switch Node
Figure 9-6. Load Transient (VIN = 12 V, VOUT = 1.0 V, IOUT = 0 A to 25 A) SLVU446B – MARCH 2011 – REVISED JULY 2021 TPS56221 Step-Down Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 16: Start Up
Figure 9-8. Pre-Biased Start-Up Waveform (VIN = 12 V, VOUT = 1.0 V, IOUT = 0 A) TPS56221 Step-Down Converter Evaluation Module User's Guide SLVU446B – MARCH 2011 – REVISED JULY 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 17: Power Off
Figure 9-10. Over-Current Protection Waveform (Ch1: VIN, Ch2: EN/SS, Ch3: VOUT, Ch4: IOUT (10 A/div), VIN = 12 V, VOUT = 1.0 V, IOUT = 36 A) SLVU446B – MARCH 2011 – REVISED JULY 2021 TPS56221 Step-Down Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 18: Control Loop Bode Plot
Figure 9-12. Thermal Image (VIN = 14 V, VOUT = 1.0 V, IOUT = 25 A, without airflow) TPS56221 Step-Down Converter Evaluation Module User's Guide SLVU446B – MARCH 2011 – REVISED JULY 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 19: Evm Assembly Drawings And Pcb Layout
Figure 10-6) show the design of the TPS56221EVM-579 printed circuit board. The EVM has been designed using a 4-layer, 2-oz copper-clad circuit board 2.5” x 2.5” with components on both sides of the PCB to allow the user to view, probe and evaluate the TPS56221 high current converter with integrated FETs in a small form factor, high-current application. - Page 20 EVM Assembly Drawings and PCB Layout www.ti.com Figure 10-3. TPS56221EVM-579 Top Copper (top view) Figure 10-4. TPS56221EVM-579 Internal 1 (top view) TPS56221 Step-Down Converter Evaluation Module User's Guide SLVU446B – MARCH 2011 – REVISED JULY 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated...
- Page 21 EVM Assembly Drawings and PCB Layout Figure 10-5. TPS56221EVM-579 Internal 2 (top view) Figure 10-6. TPS56221EVM-579 Bottom Copper (top view) SLVU446B – MARCH 2011 – REVISED JULY 2021 TPS56221 Step-Down Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated...
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Page 22: List Of Materials
List of Materials www.ti.com 11 List of Materials Table 11-1. TPS56221EVM-579 List of Materials REF DES DESCRIPTION PART NUMBER C1, C2, C3, C4 Capacitor, ceramic, 25 V, X5R, 20%, 22 µF, 1210 C5, C11 Capacitor, ceramic, 25 V, X5R, 20%, 1.0 µF, 0805 Capacitor, aluminum, 16 V , ±20%, 100 µF, code D8... - Page 23 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 24 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 25 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 26 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 27 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 28 TI products. TI’s provision of these resources does not expand or otherwise alter TI’s applicable warranties or warranty disclaimers for TI products.IMPORTANT NOTICE Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2021, Texas Instruments Incorporated...
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