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User's Guide
TPS546D24S 2-Phase SWIFT
Evaluation Module User's Guide
The TPS546D24SEVM-2PH evaluation module (EVM) is a two-phase buck converter with two TPS546D24S
devices. The TPS546D24S device is a stackable synchronous buck with PMBus
from a nominal 2.95-V to 16-V supply. The device allows programming and monitoring through the PMBus
interface.
Two TPS546D24S devices are configured as a 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................................................................................................................................................................................7
Setup..............................................................................................................................................................................10
4.1 Test and Configuration Software......................................................................................................................................
4.2 Test Equipment................................................................................................................................................................
4.3 Tip and Barrel Measurement............................................................................................................................................
4.4 List of Test Points, Jumpers, and Connectors..................................................................................................................
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..........................................................................................................................................................................19
7.3 Transient Response.........................................................................................................................................................
7.4 Control Loop Bode Plot....................................................................................................................................................
7.5 Output Ripple...................................................................................................................................................................
On........................................................................................................................................................................22
Off........................................................................................................................................................................24
7.9 Control On With Pre-biased Output.................................................................................................................................
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........................................................................................................................................
SLUUCQ1 - MARCH 2023
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ABSTRACT
Table of Contents
VDD5...............................................................................................................................14
GUI..........................................................................................................................15
TP25)....................................................................................19
Voltage............................................................................................................................22
TPS546D24S 2-Phase SWIFT
Copyright © 2023 Texas Instruments Incorporated
Step-Down Converter
®
interface that can operate
™
Step-Down Converter Evaluation Module
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Summary of Contents for Texas Instruments TPS546D24SEVM-2PH
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Page 1: Table Of Contents
™ Step-Down Converter Evaluation Module User's Guide ABSTRACT The TPS546D24SEVM-2PH evaluation module (EVM) is a two-phase buck converter with two TPS546D24S devices. The TPS546D24S device is a stackable synchronous buck with PMBus ® interface that can operate from a nominal 2.95-V to 16-V supply. The device allows programming and monitoring through the PMBus interface. - Page 2 Output.....................25 Figure 7-16. Inductor Current and Switch Node Waveform, 40-A Load..................Figure 7-17. Thermal Image..............................Figure 8-1. TPS546D24SEVM-2PH Top Side Component View (Top View)................Figure 8-2. TPS546D24SEVM-2PH Bottom Side Component View (Bottom View)..............Figure 8-3. TPS546D24SEVM-2PH Top Copper (Top View).....................
- Page 3 Trademarks Table 6-3. List of Test Points for Loop Response Measurements....................18 Table 9-1. TPS546D24SEVM-2PH Bill of Materials........................30 Trademarks SWIFT ™ is a trademark of Texas Instruments. PMBus ® is a registered trademark of System Management Interface Forum. All trademarks are the property of their respective owners.
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Page 4: Description
The TPS546D24SEVM-2PH is a two-phase buck design using two stacked TPS546D24S devices. The TPS546D24SEVM-2PH is designed for a nominal 12-V bus and to produce a regulated 0.8-V output at up to 80 A of load current. The TPS546D24SEVM-2PH is designed to demonstrate stacking operation of the TPS546D24S 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
PMBus interface – Programmable turn-on and turn-off delays • Convenient test points for probing critical waveforms ™ SLUUCQ1 – MARCH 2023 TPS546D24S 2-Phase SWIFT Step-Down Converter Evaluation Module Submit Document Feedback User's Guide Copyright © 2023 Texas Instruments Incorporated... -
Page 6: Electrical Performance Specifications
2 Electrical Performance Specifications Table 2-1 lists the electrical performance specifications in room temperature (20 to 25°C). Characteristics are given for an input voltage of VIN = 12 V, unless otherwise specified. Table 2-1. TPS546D24SEVM-2PH Electrical Performance Specifications Parameter Test Conditions Unit... -
Page 7: Schematic
Schematic 3 Schematic Figure 3-1 through Figure 3-3 illustrate the TPS546D24SEVM-2PH schematics. Figure 3-1. TPS546D24SEVM-2PH Schematic Page 1 SLUUCQ1 – MARCH 2023 TPS546D24S 2-Phase SWIFT Step-Down Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 8: Figure 3-2. Tps546D24Sevm-2Ph Schematic Page 2 (U1_P1 Controller)
Schematic www.ti.com Figure 3-2. TPS546D24SEVM-2PH Schematic Page 2 (U1_P1 Controller) TPS546D24S 2-Phase SWIFT Step-Down Converter Evaluation Module User's Guide SLUUCQ1 – MARCH 2023 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 9: Figure 3-3. Tps546D24Sevm-2Ph Schematic Page 3 (U1_P2 Follower)
Schematic Figure 3-3. TPS546D24SEVM-2PH Schematic Page 3 (U1_P2 Follower) SLUUCQ1 – MARCH 2023 TPS546D24S 2-Phase SWIFT Step-Down Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 10: Test Setup
The TI Fusion Digital Power Designer is the graphical user interface (GUI) used to configure and monitor the Texas Instruments TPS546D24S 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 11: Tip And Barrel Measurement
U1_P2 output voltage measurement point for efficiency, reference to TP30 TP27 T-H Loop SYNC Synchronization connection between U1_P1 and U1_P2. External SYNC input. ™ SLUUCQ1 – MARCH 2023 TPS546D24S 2-Phase SWIFT Step-Down Converter Evaluation Module Submit Document Feedback User's Guide Copyright © 2023 Texas Instruments Incorporated... -
Page 12: Table 4-2. Jumpers
Do not use Micro USB Micro USB Micro USB connector to power EVM from a 5 V USB source ™ TPS546D24S 2-Phase SWIFT Step-Down Converter Evaluation Module SLUUCQ1 – MARCH 2023 User's Guide Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... - Page 13 VOUT VOUT+ connector Terminal block, 2 × 1 Ext_AVIN External AVIN connector Terminal 90A Lug VOUT– connector ™ SLUUCQ1 – MARCH 2023 TPS546D24S 2-Phase SWIFT Step-Down Converter Evaluation Module Submit Document Feedback User's Guide Copyright © 2023 Texas Instruments Incorporated...
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Page 14: Evaluating Single Phase Operation
3. Short JP1_P1 and JP1_P2 to connect the LDO output to the VDD5 pin. 4. Ensure the VDD5 output of the TPS546D24S is set below the external LDO output voltage. ™ TPS546D24S 2-Phase SWIFT Step-Down Converter Evaluation Module SLUUCQ1 – MARCH 2023 User's Guide Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 15: Evm Configuration Using The Fusion Gui
By default the pinstrap resistors configure U1_P1 as the stack controller and U1_P2 as the stack follower. ™ SLUUCQ1 – MARCH 2023 TPS546D24S 2-Phase SWIFT Step-Down Converter Evaluation Module Submit Document Feedback User's Guide Copyright © 2023 Texas Instruments Incorporated... -
Page 16: Test Procedure
Table 2-1. 7. Decrease the load to 0 A. 8. Decrease V to 0 V. ™ TPS546D24S 2-Phase SWIFT Step-Down Converter Evaluation Module SLUUCQ1 – MARCH 2023 User's Guide Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 17: Efficiency Measurement Test Points
This pair of test points are connected to VOUT and GND near the output inductor for U1_P2 Output voltage measurement TP30 GND_P2 point for VOUT– (GND) ™ SLUUCQ1 – MARCH 2023 TPS546D24S 2-Phase SWIFT Step-Down Converter Evaluation Module Submit Document Feedback User's Guide Copyright © 2023 Texas Instruments Incorporated... -
Page 18: Control Loop Gain And Phase Measurement Procedure
6.3 Control Loop Gain and Phase Measurement Procedure The TPS546D24SEVM-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 must be used during loop response measurements as the perturbation injecting points for the loop . -
Page 19: 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 TPS546D24SEVM-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 20: Transient Response
100000 1000000 Frequency (Hz) Figure 7-6. Bode Plot at 0.8-V Output at 12 V , 20-A Load ™ TPS546D24S 2-Phase SWIFT Step-Down Converter Evaluation Module SLUUCQ1 – MARCH 2023 User's Guide Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 21: Output Ripple
Timescale = 1 µs/div, CH1 = SW1 at 5 V/div, CH2 = SW2 at 5 V/div, CH3 = V at 10 mV/div Figure 7-8. Output Ripple With 80-A Load ™ SLUUCQ1 – MARCH 2023 TPS546D24S 2-Phase SWIFT Step-Down Converter Evaluation Module Submit Document Feedback User's Guide Copyright © 2023 Texas Instruments Incorporated... -
Page 22: Power Mosfet Drain-Source Voltage
7.7 Control On Figure 7-11 Figure 7-12 illustrate the start-up from control on waveforms at 0-A and 80-A output. ™ TPS546D24S 2-Phase SWIFT Step-Down Converter Evaluation Module SLUUCQ1 – MARCH 2023 User's Guide Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 23: Figure 7-11. Start-Up From Control, 0-A Load
500mV/div, CH4 = EN/UVLO at 2 V/div, CH5 = PGOOD at 5 V/div Figure 7-12. Start-Up From Control, 80-A CC Load ™ SLUUCQ1 – MARCH 2023 TPS546D24S 2-Phase SWIFT Step-Down Converter Evaluation Module Submit Document Feedback User's Guide Copyright © 2023 Texas Instruments Incorporated... -
Page 24: Control Off
500mV/div, CH4 = EN/UVLO at 2 V/div, CH5 = PGOOD at 5 V/div Figure 7-14. Shutdown From Control, 20-A CC Load ™ TPS546D24S 2-Phase SWIFT Step-Down Converter Evaluation Module SLUUCQ1 – MARCH 2023 User's Guide Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 25: Control On With Pre-Biased Output
Timescale = 1 µs/div, CH1 = SW1 at 10 V/div, CH2 = SW2 at 10 V/div, CH3 = IL1 at 10 A/div, CH4 = IL2 at 10 A/div Figure 7-16. Inductor Current and Switch Node Waveform, 40-A Load ™ SLUUCQ1 – MARCH 2023 TPS546D24S 2-Phase SWIFT Step-Down Converter Evaluation Module Submit Document Feedback User's Guide Copyright © 2023 Texas Instruments Incorporated... -
Page 26: Thermal Image
Performance Data and Typical Characteristic Curves www.ti.com 7.11 Thermal Image Figure 7-17 shows the TPS546D24SEVM-2PH thermal image. = 12 V, I = 80 A Figure 7-17. Thermal Image ™ TPS546D24S 2-Phase SWIFT Step-Down Converter Evaluation Module SLUUCQ1 – MARCH 2023... -
Page 27: Evm Assembly Drawing And Pcb Layout
EVM Assembly Drawing and PCB Layout 8 EVM Assembly Drawing and PCB Layout Figure 8-1 through Figure 8-8 show the design of the TPS546D24SEVM-2PH printed circuit board. Figure 8-2. TPS546D24SEVM-2PH Bottom Side Figure 8-1. TPS546D24SEVM-2PH Top Side Component View (Bottom View) Component View (Top View) Figure 8-3. -
Page 28: Figure 8-4. Tps546D24Sevm-2Ph Internal Layer
EVM Assembly Drawing and PCB Layout www.ti.com Figure 8-5. TPS546D24SEVM-2PH Internal Layer 2 Figure 8-6. TPS546D24SEVM-2PH Internal Layer 3 (Top View) (Top View) Figure 8-7. TPS546D24SEVM-2PH Internal Layer 4 Figure 8-8. TPS546D24SEVM-2PH Internal Layer 5 (Top View) (Top View) ™... -
Page 29: Figure 8-9. Tps546D24Sevm-2Ph Internal Layer 6
EVM Assembly Drawing and PCB Layout Figure 8-9. TPS546D24SEVM-2PH Internal Layer 6 Figure 8-10. TPS546D24SEVM-2PH Internal Bottom (Top View) Layer (Top View) ™ SLUUCQ1 – MARCH 2023 TPS546D24S 2-Phase SWIFT Step-Down Converter Evaluation Module Submit Document Feedback User's Guide... -
Page 30: Bill Of Materials
Bill of Materials www.ti.com 9 Bill of Materials Table 9-1 lists the BOM for the TPS546D24SEVM-2PH. Table 9-1. TPS546D24SEVM-2PH Bill of Materials Designator Quantity Value Description Package Part Number Manufacturer !PCB1 Printed Circuit Board BSR104 C1_P1, C1_P2, C11_P1, C11_P2 1 uF... - Page 31 Bill of Materials Table 9-1. TPS546D24SEVM-2PH Bill of Materials (continued) Designator Quantity Value Description Package Part Number Manufacturer Sullins Connector JP7_P1, JP7_P2 Header, 100mil, 3x1, Gold, TH PBC03SAAN PBC03SAAN Solutions Inductor, Shielded, Ferrite, 150 nH, 55 A, 0.00015 ohm,...
- Page 32 Bill of Materials www.ti.com Table 9-1. TPS546D24SEVM-2PH Bill of Materials (continued) Designator Quantity Value Description Package Part Number Manufacturer C10_P1, C10_P2, C14_P1, C14_P2 1 uF CAP, CERM, 1 uF, 25 V, +/- 10%, X7R, 0603 0603 C0603C105K3RACTU Kemet C16_P1, C16_P2 0.1 uF...
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Page 33: Using The Fusion Gui
Figures in this section can use screen shots showing other TPS546x24x family devices to illustrate the use of the FUSION GUI with the TPS546D24SEVM-2PH when those functions are similar. Figure 10-1. Select Device Scanning Mode ™... -
Page 34: General Settings
PMBus values of one or all of the followers, the stack controller relays these commands to the followers. All commands on this tab are for PHASE = 0xFF. Figure 10-2. General Settings ™ TPS546D24S 2-Phase SWIFT Step-Down Converter Evaluation Module SLUUCQ1 – MARCH 2023 User's Guide Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 35: Changing On_Off_Config
This pop-up gives multiple options on what turns on and off power conversion. By default the TPS546D24S is configured to CONTROL Pin Only. This pin is the EN/UVLO pin. Figure 10-3. Configure – ON_OFF_CONFIG ™ SLUUCQ1 – MARCH 2023 TPS546D24S 2-Phase SWIFT Step-Down Converter Evaluation Module Submit Document Feedback User's Guide Copyright © 2023 Texas Instruments Incorporated... -
Page 36: Pop-Up For Some Commands While Conversion Is Enabled
Figure 10-4. Pop-up When Trying to Change FREQUENCY_SWITCH with Conversion Enabled ™ TPS546D24S 2-Phase SWIFT Step-Down Converter Evaluation Module SLUUCQ1 – MARCH 2023 User's Guide Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 37: Smbalert# Mask
The sources of SMBALERT which can be masked are found and configured on the SMBALERT # Mask tab (Figure 10-5). Figure 10-5. Configure – SMBALERT # Mask ™ SLUUCQ1 – MARCH 2023 TPS546D24S 2-Phase SWIFT Step-Down Converter Evaluation Module Submit Document Feedback User's Guide Copyright © 2023 Texas Instruments Incorporated... -
Page 38: Device Info
Iout Cal Offset are found on the Device Info tab (see Figure 10-6). Figure 10-6. Configure – Device Info ™ TPS546D24S 2-Phase SWIFT Step-Down Converter Evaluation Module SLUUCQ1 – MARCH 2023 User's Guide Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 39: Phase Commands
Use the Phase Command tab (see Figure 10-7) to calibrate the IOUT/Temp of each phase. Figure 10-7. Phase Commands ™ SLUUCQ1 – MARCH 2023 TPS546D24S 2-Phase SWIFT Step-Down Converter Evaluation Module Submit Document Feedback User's Guide Copyright © 2023 Texas Instruments Incorporated... -
Page 40: 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 ™ TPS546D24S 2-Phase SWIFT Step-Down Converter Evaluation Module SLUUCQ1 – MARCH 2023 User's Guide Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 41: 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 ™ SLUUCQ1 – MARCH 2023 TPS546D24S 2-Phase SWIFT Step-Down Converter Evaluation Module Submit Document Feedback User's Guide Copyright © 2023 Texas Instruments Incorporated... -
Page 42: Figure 10-10. Monitor Screen
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 ™ TPS546D24S 2-Phase SWIFT Step-Down Converter Evaluation Module SLUUCQ1 – MARCH 2023 User's Guide Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 43: Figure 10-11. Status Screen
Selecting Status screen from lower left corner (Figure 10-11) shows the status of the device. Figure 10-11. Status Screen ™ SLUUCQ1 – MARCH 2023 TPS546D24S 2-Phase SWIFT Step-Down Converter Evaluation Module Submit Document Feedback User's Guide Copyright © 2023 Texas Instruments Incorporated... - Page 44 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 45 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 46 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 47 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 48 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 © 2023, Texas Instruments Incorporated...
- Page 49 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 © 2023, Texas Instruments Incorporated...
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