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User's Guide
TPS546B24A 2-Phase SWIFT™ Step-Down Converter
Evaluation Module User's Guide
The TPS546B24AEVM-2PH evaluation module (EVM) is a two-phase buck converter with two TPS546B24A
devices. The TPS546B24A device is a stackable synchronous buck with PMBus interface that can operate from
a nominal 2.95-V to 18-V supply. The device allows programming and monitoring through the interface.
Two TPS546B24A devices are configured as two-phase buck converter in factory default. Output current is
evenly distributed in the two devices; both the negative and positive output terminals are connected together.
1 Description..............................................................................................................................................................................
1.1 Before You Begin...............................................................................................................................................................
Applications............................................................................................................................................................4
1.3 Features.............................................................................................................................................................................
2 Electrical Performance Specifications.................................................................................................................................
3
Schematic................................................................................................................................................................................6
Setup................................................................................................................................................................................9
4.1 Test and Configuration Software........................................................................................................................................
4.2 Test Equipment..................................................................................................................................................................
Measurement............................................................................................................................................10
4.5 Evaluating Single Phase Operation.................................................................................................................................
4.6 Evaluating Split Rail Input................................................................................................................................................
5.1 Configuration Procedure..................................................................................................................................................
6 Test Procedure......................................................................................................................................................................
6.1 Line and Load Regulation and Efficiency Measurement Procedure................................................................................
6.2 Efficiency Measurement Test Points................................................................................................................................
6.3 Control Loop Gain and Phase Measurement Procedure.................................................................................................
7 Performance Data and Typical Characteristic Curves......................................................................................................
7.1
Efficiency..........................................................................................................................................................................17
7.3 Transient Response.........................................................................................................................................................
7.4 Control Loop Bode Plot....................................................................................................................................................
7.5 Output Ripple...................................................................................................................................................................
On........................................................................................................................................................................21
Off........................................................................................................................................................................22
7.10 Current Sharing Between Two Phases..........................................................................................................................
7.11 Thermal Image...............................................................................................................................................................
8 EVM Assembly Drawing and PCB Layout..........................................................................................................................
9 Bill of Materials.....................................................................................................................................................................
10 Using the Fusion GUI.........................................................................................................................................................
10.1 Opening the Fusion GUI................................................................................................................................................
10.2 General Settings............................................................................................................................................................
10.3 Changing ON_OFF_CONFIG........................................................................................................................................
SLUUC48A - FEBRUARY 2020 - REVISED FEBRUARY 2022
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ABSTRACT
Table of Contents
Connectors..................................................................................................................10
VDD5...............................................................................................................................13
GUI..........................................................................................................................14
Voltage............................................................................................................................20
Output..................................................................................................................................23
Enabled..........................................................................................34
TPS546B24A 2-Phase SWIFT™ Step-Down Converter Evaluation Module
Copyright © 2022 Texas Instruments Incorporated
TP25)....................................................................................17
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Summary of Contents for Texas Instruments TPS546B24AEVM-2PH
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Page 1: Table Of Contents
Evaluation Module User's Guide ABSTRACT The TPS546B24AEVM-2PH evaluation module (EVM) is a two-phase buck converter with two TPS546B24A devices. The TPS546B24A device is a stackable synchronous buck with PMBus interface that can operate from a nominal 2.95-V to 18-V supply. The device allows programming and monitoring through the interface. - Page 2 11 Revision History..................................41 List of Figures Figure 3-1. TPS546B24AEVM-2PH Schematic Page 1......................Figure 3-2. TPS546B24AEVM-2PH Schematic Page 2 (U1_P1 Loop Controller)..............Figure 3-3. TPS546B24AEVM-2PH Schematic Page 3 (U1_P2 Loop Follower)................ Figure 4-1. Tip and Barrel Measurement........................... Figure 7-1. Efficiency, V Measured Using TP13, TP16, TP26, and TP30................17...
- Page 3 Table 6-2. Test Points for Better Efficiency Measurements......................15 Table 6-3. List of Test Points for Loop Response Measurements....................16 Table 9-1. TPS546B24AEVM-2PH Bill of Materials........................28 Trademarks All trademarks are the property of their respective owners. SLUUC48A – FEBRUARY 2020 – REVISED FEBRUARY 2022 TPS546B24A 2-Phase SWIFT™...
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Page 4: Description
12-V bus and to produce a regulated 0.8-V output at up to 40 A of load current. The TPS546B24AEVM-2PH is designed to demonstrate stacking operation of the TPS546B24A in a two-phase, low- output voltage application while providing a number of test points to evaluate the performance of the devices. -
Page 5: Features
Table 2-1 lists the electrical performance specifications in room temperature (20 to 25°C). Characteristics are given for an input voltage of V = 12 V, unless otherwise specified. Table 2-1. TPS546B24AEVM-2PH Electrical Performance Specifications Parameter Test Conditions Unit Input Characteristics... -
Page 6: Schematic
47uF 47uF 47uF 47uF 47uF 47uF 47uF 47uF Figure 3-1. TPS546B24AEVM-2PH Schematic Page 1 TPS546B24A 2-Phase SWIFT™ Step-Down Converter Evaluation Module User's Guide SLUUC48A – FEBRUARY 2020 – REVISED FEBRUARY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 7: Figure 3-2. Tps546B24Aevm-2Ph Schematic Page 2 (U1_P1 Loop Controller)
AGND 10.0k R27_P1 AGND TPS546B24ARVFR Figure 3-2. TPS546B24AEVM-2PH Schematic Page 2 (U1_P1 Loop Controller) SLUUC48A – FEBRUARY 2020 – REVISED FEBRUARY 2022 TPS546B24A 2-Phase SWIFT™ Step-Down Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 8: Figure 3-3. Tps546B24Aevm-2Ph Schematic Page 3 (U1_P2 Loop Follower)
AGND 10.0k R27_P2 AGND TPS546B24ARVFR Figure 3-3. TPS546B24AEVM-2PH Schematic Page 3 (U1_P2 Loop Follower) TPS546B24A 2-Phase SWIFT™ Step-Down Converter Evaluation Module User's Guide SLUUC48A – FEBRUARY 2020 – REVISED FEBRUARY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 9: Test Setup
The TI Fusion Digital Power Designer is the graphical user interface (GUI) used to configure and monitor the Texas Instruments TPS546B24A 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 described in Section 4.2.6. -
Page 10: Tip And Barrel Measurement
TP20 T-H Loop GND reference TP21 T-H Loop VSHARE VSHARE measurement point. Sensitive signal TPS546B24A 2-Phase SWIFT™ Step-Down Converter Evaluation Module SLUUC48A – FEBRUARY 2020 – REVISED FEBRUARY 2022 User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 11: Table 4-2. Jumpers
AVIN pin connected to PVIN through 10-Ω resistor Table 4-5 lists the EVM connector functions. SLUUC48A – FEBRUARY 2020 – REVISED FEBRUARY 2022 TPS546B24A 2-Phase SWIFT™ Step-Down Converter Evaluation Module Submit Document Feedback User's Guide Copyright © 2022 Texas Instruments Incorporated... -
Page 12: Table 4-5. Connector Functions
Terminal block, 2 × 1 Ext_AVIN External AVIN connector Terminal 90A Lug VOUT– connector TPS546B24A 2-Phase SWIFT™ Step-Down Converter Evaluation Module SLUUC48A – FEBRUARY 2020 – REVISED FEBRUARY 2022 User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 13: Evaluating Single Phase Operation
4. Ensure the VDD5 output of the TPS546B24A is set below the external output voltage of the LDO. SLUUC48A – FEBRUARY 2020 – REVISED FEBRUARY 2022 TPS546B24A 2-Phase SWIFT™ Step-Down Converter Evaluation Module Submit Document Feedback User's Guide Copyright © 2022 Texas Instruments Incorporated... -
Page 14: Evm Configuration Using The Fusion Gui
2-1. 7. Decrease the load to 0 A. 8. Decrease V to 0 V. TPS546B24A 2-Phase SWIFT™ Step-Down Converter Evaluation Module SLUUC48A – FEBRUARY 2020 – REVISED FEBRUARY 2022 User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 15: Efficiency Measurement Test Points
This pair of test points is connected to VOUT and GND near the output inductor for U1_P2. Output voltage measurement TP30 GND_P2 point for VOUT– (GND) SLUUC48A – FEBRUARY 2020 – REVISED FEBRUARY 2022 TPS546B24A 2-Phase SWIFT™ Step-Down Converter Evaluation Module Submit Document Feedback User's Guide Copyright © 2022 Texas Instruments Incorporated... -
Page 16: Control Loop Gain And Phase Measurement Procedure
6.3 Control Loop Gain and Phase Measurement Procedure The TPS546B24AEVM-2PH includes a 49.9-Ω series resistor in the feedback loop for V . The resistor is accessible at the test points TP17 and TP18 for loop response analysis. These test points should be used during loop response measurements as the perturbation injecting points for the loop. -
Page 17: Performance Data And Typical Characteristic Curves
7 Performance Data and Typical Characteristic Curves Figure 7-1 through Figure 7-4 present typical performance curves for the TPS546B24AEVM-2PH. The input voltage is 12 V and the oscilloscope measurements use 20-MHz bandwidth limiting, unless otherwise noted. 7.1 Efficiency = 5 V... -
Page 18: Transient Response
Frequency (Hz) Figure 7-6. Bode Plot at 0.8-V Output at 12 V , 20-A Load TPS546B24A 2-Phase SWIFT™ Step-Down Converter Evaluation Module SLUUC48A – FEBRUARY 2020 – REVISED FEBRUARY 2022 User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 19: Output Ripple
Figure 7-7. Output Ripple With 0-A Load Figure 7-8. Output Ripple With 40-A Load SLUUC48A – FEBRUARY 2020 – REVISED FEBRUARY 2022 TPS546B24A 2-Phase SWIFT™ Step-Down Converter Evaluation Module Submit Document Feedback User's Guide Copyright © 2022 Texas Instruments Incorporated... -
Page 20: Power Mosfet Drain-Source Voltage
The voltage is measured with 1-GHz bandwidth and at the solder mask openings near the U1_P1 IC using a 1-GHz differential probe. Figure 7-9. Low-Side MOSFET V Figure 7-10. High-Side MOSFET V TPS546B24A 2-Phase SWIFT™ Step-Down Converter Evaluation Module SLUUC48A – FEBRUARY 2020 – REVISED FEBRUARY 2022 User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 21: Control On
Figure 7-11. Start-Up From Control, 0-A Load Figure 7-12. Start-Up From Control, 40-A CC Load SLUUC48A – FEBRUARY 2020 – REVISED FEBRUARY 2022 TPS546B24A 2-Phase SWIFT™ Step-Down Converter Evaluation Module Submit Document Feedback User's Guide Copyright © 2022 Texas Instruments Incorporated... -
Page 22: Control Off
Figure 7-13. Shutdown From Control, 0-A Load Figure 7-14. Shutdown From Control, 20-A CC Load TPS546B24A 2-Phase SWIFT™ Step-Down Converter Evaluation Module SLUUC48A – FEBRUARY 2020 – REVISED FEBRUARY 2022 User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 23: Control On With Pre-Biased Output
Figure 7-16. Inductor Current and Switch Node Waveform, 40-A Load SLUUC48A – FEBRUARY 2020 – REVISED FEBRUARY 2022 TPS546B24A 2-Phase SWIFT™ Step-Down Converter Evaluation Module Submit Document Feedback User's Guide Copyright © 2022 Texas Instruments Incorporated... -
Page 24: Thermal Image
Performance Data and Typical Characteristic Curves www.ti.com 7.11 Thermal Image Figure 7-17 shows the TPS546B24AEVM-2PH thermal image. = 12 V, I = 40 A Figure 7-17. Thermal Image TPS546B24A 2-Phase SWIFT™ Step-Down Converter Evaluation Module SLUUC48A – FEBRUARY 2020 – REVISED FEBRUARY 2022... -
Page 25: Evm Assembly Drawing And Pcb Layout
EVM Assembly Drawing and PCB Layout 8 EVM Assembly Drawing and PCB Layout Figure 8-3 through Figure 8-10 show the design of the TPS546B24AEVM-2PH printed circuit board. Figure 8-1. TPS546B24AEVM-2PH 3D (Top View) Figure 8-2. TPS546B24AEVM-2PH 3D (Bottom View) Figure 8-3. TPS546B24AEVM-2PH Top Side Figure 8-4. -
Page 26: Figure 8-5. Tps546B24Aevm-2Ph Top Copper (Top View)
EVM Assembly Drawing and PCB Layout www.ti.com Figure 8-5. TPS546B24AEVM-2PH Top Copper (Top Figure 8-6. TPS546B24AEVM-2PH Internal Layer 1 View) (Top View) Figure 8-7. TPS546B24AEVM-2PH Internal Layer 2 Figure 8-8. TPS546B24AEVM-2PH Internal Layer 3 (Top View) (Top View) TPS546B24A 2-Phase SWIFT™ Step-Down Converter Evaluation Module SLUUC48A –... -
Page 27: Figure 8-9. Tps546B24Aevm-2Ph Internal Layer 4
EVM Assembly Drawing and PCB Layout Figure 8-9. TPS546B24AEVM-2PH Internal Layer 4 Figure 8-10. TPS546B24AEVM-2PH Internal Layer 5 (Top View) (Top View) Figure 8-11. TPS546B24AEVM-2PH Internal Layer 6 Figure 8-12. TPS546B24AEVM-2PH Internal Bottom (Top View) Layer (Top View) SLUUC48A – FEBRUARY 2020 – REVISED FEBRUARY 2022 TPS546B24A 2-Phase SWIFT™... -
Page 28: Bill Of Materials
Bill of Materials www.ti.com 9 Bill of Materials Table 9-1 lists the BOM for the TPS546B24AEVM-2PH. Table 9-1. TPS546B24AEVM-2PH Bill of Materials Designator Quantity Value Description PackageReference PartNumber Manufacturer !PCB1 Printed Circuit Board BSR104 C1_P1, C1_P2, C11_P1, C11_P2 1 μF CAP, CERM, 1 uF, 25 V, ±10%, X7R, 0603... - Page 29 Bill of Materials Table 9-1. TPS546B24AEVM-2PH Bill of Materials (continued) Designator Quantity Value Description PackageReference PartNumber Manufacturer L1, L2 300nH Inductor, Shielded, Ferrite, 300 nH, 52 A, 0.00015 Ω, SMD 13.46 × 8.0 × 12.95 SLC1480-301MLB Coilcraft LBL1 Thermal Transfer Printable Labels, 0.650" W × 0.200" H PCB Label 0.650 ×...
- Page 30 Bill of Materials www.ti.com Table 9-1. TPS546B24AEVM-2PH Bill of Materials (continued) Designator Quantity Value Description PackageReference PartNumber Manufacturer C16_P1, C16_P2 0.1 μF CAP, CERM, 0.1 μF, 50 V, ±10%, X7R, 0603 0603 C0603C104K5RACTU Kemet C17_P2 100 pF CAP, CERM, 100 pF, 50 V, ±5%, C0G/NP0, 0603...
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Page 31: Using The Fusion Gui
Fusion GUI. See Section 5 for the recommended procedure. Figure 10-1. Select Device Scanning Mode SLUUC48A – FEBRUARY 2020 – REVISED FEBRUARY 2022 TPS546B24A 2-Phase SWIFT™ Step-Down Converter Evaluation Module Submit Document Feedback User's Guide Copyright © 2022 Texas Instruments Incorporated... -
Page 32: General Settings
PMBus registers of the follower, the controller will relay these commands to the followers. All commands on this tab are for PHASE = 0xFF. Figure 10-2. General Settings TPS546B24A 2-Phase SWIFT™ Step-Down Converter Evaluation Module SLUUC48A – FEBRUARY 2020 – REVISED FEBRUARY 2022 User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 33: Changing On_Off_Config
CONTROL Pin Only. This is the EN/UVLO pin. Figure 10-3. Configure – ON_OFF_CONFIG SLUUC48A – FEBRUARY 2020 – REVISED FEBRUARY 2022 TPS546B24A 2-Phase SWIFT™ Step-Down Converter Evaluation Module Submit Document Feedback User's Guide Copyright © 2022 Texas Instruments Incorporated... -
Page 34: Pop-Up For Some Commands While Conversion Is Enabled
Figure 10-4. Pop-up When Trying to Change FREQUENCY_SWITCH With Conversion Enabled TPS546B24A 2-Phase SWIFT™ Step-Down Converter Evaluation Module SLUUC48A – FEBRUARY 2020 – REVISED FEBRUARY 2022 User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 35: Smbalert# Mask
The sources of SMBALERT that can be masked are found and configured on the SMBALERT # Mask tab (Figure 10-5). Figure 10-5. Configure – SMBALERT # Mask SLUUC48A – FEBRUARY 2020 – REVISED FEBRUARY 2022 TPS546B24A 2-Phase SWIFT™ Step-Down Converter Evaluation Module Submit Document Feedback User's Guide Copyright © 2022 Texas Instruments Incorporated... -
Page 36: Device Info
Iout Cal Offset are found on the Device Info tab (Figure 10-6). Figure 10-6. Configure – Device Info TPS546B24A 2-Phase SWIFT™ Step-Down Converter Evaluation Module SLUUC48A – FEBRUARY 2020 – REVISED FEBRUARY 2022 User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 37: Phase Commands
Use the Phase Command tab (Figure 10-7) to calibrate the IOUT/Temp of each phase. Figure 10-7. Phase Commands SLUUC48A – FEBRUARY 2020 – REVISED FEBRUARY 2022 TPS546B24A 2-Phase SWIFT™ Step-Down Converter Evaluation Module Submit Document Feedback User's Guide Copyright © 2022 Texas Instruments Incorporated... -
Page 38: All Config
10-8) to configure all of the configurable parameters, which also shows other details like Hex encoding. Figure 10-8. Configure – All Config TPS546B24A 2-Phase SWIFT™ Step-Down Converter Evaluation Module SLUUC48A – FEBRUARY 2020 – REVISED FEBRUARY 2022 User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 39: Pin Strapping
PMBus commands at power up. The EEPROM Value column shows the values currently configured to the related PMBus commands. Figure 10-9. Configure – Pin Strapping SLUUC48A – FEBRUARY 2020 – REVISED FEBRUARY 2022 TPS546B24A 2-Phase SWIFT™ Step-Down Converter Evaluation Module Submit Document Feedback User's Guide Copyright © 2022 Texas Instruments Incorporated... -
Page 40: Monitor
With two devices stacked together, the Iout reading is the total load supported by both devices. There is also an Iout, which shows the current in each phase. Figure 10-10. Monitor Screen TPS546B24A 2-Phase SWIFT™ Step-Down Converter Evaluation Module SLUUC48A – FEBRUARY 2020 – REVISED FEBRUARY 2022 User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 41: Status
Changed all instances of legacy terminology to loop controller and loop follower where PMBus is mentioned.4 SLUUC48A – FEBRUARY 2020 – REVISED FEBRUARY 2022 TPS546B24A 2-Phase SWIFT™ Step-Down Converter Evaluation Module Submit Document Feedback User's Guide Copyright © 2022 Texas Instruments Incorporated... - Page 42 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 43 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 44 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 45 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 46 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 47 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 © 2022, Texas Instruments Incorporated...
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