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Texas Instruments TPS546C23 User Manual

Using the stacking two phase evaluation module
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Using the Stacking TPS546C23 Two Phase Evaluation
The TPS546C23EVM2-746 evaluation module (EVM) is a two phase buck converter with two TPS546C23
devices. The TPS546C23 device is a stackable synchronous buck with PMBus interface that can operate
from a nominal 4.5-V to 18-V supply. The device allows programming and monitoring via the PMBus
interface.
Two TPS546C23 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.
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SLUUBH5 - November 2016
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Copyright © 2016, Texas Instruments Incorporated
Contents
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List of Figures
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Using the Stacking TPS546C23 Two Phase Evaluation Module
User's Guide
SLUUBH5 - November 2016
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Summary of Contents for Texas Instruments TPS546C23

  • Page 1: Table Of Contents

    4.5-V to 18-V supply. The device allows programming and monitoring via the PMBus interface. Two TPS546C23 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.

  • Page 2: Sluubh5 – November

    List of Test Points for Loop Response Measurements ............... Test Points for Better Efficiency Measurements ................TPS546C23EVM2-746 Components List Using the Stacking TPS546C23 Two Phase Evaluation Module SLUUBH5 – November 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 3: Description

    All trademarks are the property of their respective owners. Description The TPS546C23EVM2-746 is a two phase buck converter with two stacked TPS546C23 devices. It uses a nominal 12-V bus to produce a regulated 1.2-V output at up to 70 A of load current. The...

  • Page 4: Typical Applications

    PMBus interface – Programmable turn-on and turn-off delays • Convenient test points for probing critical waveforms Using the Stacking TPS546C23 Two Phase Evaluation Module SLUUBH5 – November 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 5: Electrical Performance Specifications

    Schematic Figure 1 illustrates the TPS546C23EVM2-746 EVM schematic. SLUUBH5 – November 2016 Using the Stacking TPS546C23 Two Phase Evaluation Module Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 6: Tps546C23Evm2-746 Schematic

    47uF 47uF 47uF 47uF 330pF RSN_M RSN_S TP36 49.9 TP37 TP38 49.9 TP39 RSN1 RSN2 Figure 1. TPS546C23EVM2-746 Schematic Using the Stacking TPS546C23 Two Phase Evaluation Module SLUUBH5 – November 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 7: Test Setup

    4.2.6 USB-to-GPIO Interface Adapter: A communications adapter is required between the EVM and the host computer. This EVM was designed to use the Texas Instruments USB-to-GPIO Adapter, see . This adapter can be purchased here: http://www.ti.com/tool/usb-to-gpio. SLUUBH5 – November 2016...

  • Page 8: Recommended Test Setup

    TP20 with TP24. Metal Ground Barrel Probe Tip and Barrel V Ripple Measurement Figure 3. Tip and Barrel Measurement Using the Stacking TPS546C23 Two Phase Evaluation Module SLUUBH5 – November 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 9: List Of Test Points, Jumpers And Connectors

    T-H Loop Vshare1 VSHARE of U1 measurement point.Sensitive signal. TP43 T-H Loop Ishare2 ISHARE of U2 measurement point. Sensitive signal. SLUUBH5 – November 2016 Using the Stacking TPS546C23 Two Phase Evaluation Module Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 10: Connector Functions

    VIN- (GND) connector Keystone 1546 VOUT1 VOUT1+ connector Keystone 1546 VOUT1- connector Keystone 1546 VOUT2 VOUT2+ connector Keystone 1546 VOUT2- connector Using the Stacking TPS546C23 Two Phase Evaluation Module SLUUBH5 – November 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 11: Evm Configuration Using The Fusion Gui

    Digital Power Designer software can be used for reconfiguration. It is necessary to have input voltage applied to the EVM prior to launching the software so that the TPS546C23 may respond to the GUI and the GUI can recognize the device. The default configuration for the EVM is to start converting at an input voltage of 4.5V, therefore to avoid any converter activity during configuration, an input voltage less than...

  • Page 12: Configuration Procedure

    TP15. 4. Connect the ground leads of both probe channels to TP11. 5. On the network analyzer, measure the Bode as TP15/TP14 (Out/In). Using the Stacking TPS546C23 Two Phase Evaluation Module SLUUBH5 – November 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 13: Efficiency Measurement

    The voltage drop from the output point of inductor to the output terminals is excluded for Output voltage measurement efficiency measurement. TP34 Eff_GND1 point for VOUT1- (GND) SLUUBH5 – November 2016 Using the Stacking TPS546C23 Two Phase Evaluation Module Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 14: Performance Data And Typical Characteristic Curves

    Input Voltage 1.196 12 V 1.195 18 V 1.194 Output Current (A) D001 Figure 5. Load Regulation of 1.2-V Output Using the Stacking TPS546C23 Two Phase Evaluation Module SLUUBH5 – November 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 15: Line Regulation

    Figure 7. Transient Response of 1.2-V Output at 12 V , Transient is 10 A to 60 A, 0.2 A/µs SLUUBH5 – November 2016 Using the Stacking TPS546C23 Two Phase Evaluation Module Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 16: Output Ripple

    (AC coupled, measured at U2 side) ripple at 10 mV/division Figure 9. Output Ripple and SW Node of 1.2-V Output at 12 V , 70-A Output Using the Stacking TPS546C23 Two Phase Evaluation Module SLUUBH5 – November 2016 Submit Documentation Feedback...

  • Page 17: Control On

    Figure 11. Start up from Control, 1.2-V Output at 12 V , 70-A Output (TON_RISE is modified to 5ms) SLUUBH5 – November 2016 Using the Stacking TPS546C23 Two Phase Evaluation Module Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 18: Control Off

    500 mV/division, Ch4 = PGOOD at 2 V/division Figure 13. Soft Stop from Control, 1.2-V Output at 12 V , 70-A Output (TON_RISE is modified to 5ms) Using the Stacking TPS546C23 Two Phase Evaluation Module SLUUBH5 – November 2016 Submit Documentation Feedback...

  • Page 19: Current Sharing Between Two Phases

    , 70-A Output Control Loop Bode Plot Figure 15. Bode Plot at 1.2-V Output at 12 V , 0-A Output SLUUBH5 – November 2016 Using the Stacking TPS546C23 Two Phase Evaluation Module Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...
  • Page 20 Performance Data and Typical Characteristic Curves www.ti.com Figure 16. Bode Plot at 1.2-V Output at 12 V , 70-A Output Using the Stacking TPS546C23 Two Phase Evaluation Module SLUUBH5 – November 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 21: 7.10 Thermal Image

    7.10 Thermal Image = 12 V, I = 70 A, V = 1.2V, F = 500 kHz Figure 17. Thermal Image SLUUBH5 – November 2016 Using the Stacking TPS546C23 Two Phase Evaluation Module Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 22: Evm Assembly Drawing And Pcb Layout

    Figure 26 show the design of the TPS546C23EVM2-746 EVM printed circuit board. Figure 18. TPS546C23EVM2-746 EVM 3D Top View Using the Stacking TPS546C23 Two Phase Evaluation Module SLUUBH5 – November 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 23: Tps546C23Evm2-746 Evm Top Layer Assembly Drawing (Top View)

    EVM Assembly Drawing and PCB Layout www.ti.com Figure 19. TPS546C23EVM2-746 EVM Top Layer Assembly Drawing (Top View) SLUUBH5 – November 2016 Using the Stacking TPS546C23 Two Phase Evaluation Module Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 24: Tps546C23Evm2-746 Evm Bottom Assembly Drawing (Bottom View)

    EVM Assembly Drawing and PCB Layout www.ti.com Figure 20. TPS546C23EVM2-746 EVM Bottom Assembly Drawing (Bottom View) Using the Stacking TPS546C23 Two Phase Evaluation Module SLUUBH5 – November 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 25: Tps546C23Evm2-746 Evm Top Copper (Top View)

    EVM Assembly Drawing and PCB Layout www.ti.com Figure 21. TPS546C23EVM2-746 EVM Top Copper (Top View) SLUUBH5 – November 2016 Using the Stacking TPS546C23 Two Phase Evaluation Module Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 26: Tps546C23Evm2-746 Evm Internal Layer 1 (Top View)

    EVM Assembly Drawing and PCB Layout www.ti.com Figure 22. TPS546C23EVM2-746 EVM Internal Layer 1 (Top View) Using the Stacking TPS546C23 Two Phase Evaluation Module SLUUBH5 – November 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 27: Tps546C23Evm2-746 Evm Internal Layer 2 (Top View)

    EVM Assembly Drawing and PCB Layout www.ti.com Figure 23. TPS546C23EVM2-746 EVM Internal Layer 2 (Top View) SLUUBH5 – November 2016 Using the Stacking TPS546C23 Two Phase Evaluation Module Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 28: Tps546C23Evm2-746 Evm Internal Layer 3 (Top View)

    EVM Assembly Drawing and PCB Layout www.ti.com Figure 24. TPS546C23EVM2-746 EVM Internal Layer 3 (Top View) Using the Stacking TPS546C23 Two Phase Evaluation Module SLUUBH5 – November 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 29: Tps546C23Evm2-746 Evm Internal Layer 4 (Top View)

    EVM Assembly Drawing and PCB Layout www.ti.com Figure 25. TPS546C23EVM2-746 EVM Internal Layer 4 (Top View) SLUUBH5 – November 2016 Using the Stacking TPS546C23 Two Phase Evaluation Module Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 30: Tps546C23Evm2-746 Evm Bottom Copper (Top View)

    EVM Assembly Drawing and PCB Layout www.ti.com Figure 26. TPS546C23EVM2-746 EVM Bottom Copper (Top View) Using the Stacking TPS546C23 Two Phase Evaluation Module SLUUBH5 – November 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 31: Bill Of Materials

    Bill of Materials www.ti.com Bill of Materials Table 8 lists the BOM for the TPS546C23EVM2-746 (TPS546C23 EVM). Table 8. TPS546C23EVM2-746 Components List Designator Description Part Number Manufacturer C1, C20, C29, C31 CAP, CERM, 1 µF, 25 V, +/- 10%, X7R, 0603...
  • Page 32 Test Point, Miniature, Black, TH 5001 Keystone 4.5V-18V, 35A PMBUS STACKABLE SYNCHRONOUS Texas U1, U2 TPS546C23 BUCK CONVERTER, RVF0040A Instruments Using the Stacking TPS546C23 Two Phase Evaluation Module SLUUBH5 – November 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 33: Screenshots

    When launching the Fusion GUI, select IC_DEVICE_ID in Figure 27 as scanning mode to find TPS546C23. Figure 27. Select Device Scanning Mode SLUUBH5 – November 2016 Using the Stacking TPS546C23 Two Phase Evaluation Module Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...
  • Page 34 In two phase stacking system, most configurable parameters are disabled in GUI if the device is detected as loop slave. Figure Using the Stacking TPS546C23 Two Phase Evaluation Module SLUUBH5 – November 2016 Submit Documentation Feedback...

  • Page 35: Configure- Limits And On/Off

    Screenshots www.ti.com Figure 28. Configure- Limits and On/Off SLUUBH5 – November 2016 Using the Stacking TPS546C23 Two Phase Evaluation Module Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 36: On/Off Control Pop-Up

    Changing the on/off configuration prompts a pop-up window with details of the options Figure Figure 29. ON/OFF Control Pop-up Using the Stacking TPS546C23 Two Phase Evaluation Module SLUUBH5 – November 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 37: Configure - Advanced

    Use the Advanced tab Figure 30 to configure: – OPTIONS: MFR_SPECIFIC_21 register – API_OPTIONS: MFR_SPECIFIC_32 register Figure 30. Configure - Advanced SLUUBH5 – November 2016 Using the Stacking TPS546C23 Two Phase Evaluation Module Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 38: Configure - Smbalert # Mask

    The sources of SMBALERT which can be masked can be found and configured on the SMBALERT # Mask tab Figure 31 Figure 31. Configure - SMBALERT # Mask Using the Stacking TPS546C23 Two Phase Evaluation Module SLUUBH5 – November 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 39: Configure - Device Info

    Loop, Vout Transition Rate and Iout Cal Offset can be found on Device Info tab Figure Figure 32. Configure - Device Info SLUUBH5 – November 2016 Using the Stacking TPS546C23 Two Phase Evaluation Module Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 40: Configure - All Config

    Hex encoding. Figure 33. Configure - All Config Using the Stacking TPS546C23 Two Phase Evaluation Module SLUUBH5 – November 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...
  • Page 41 Iout reading is half of the total load. SLUUBH5 – November 2016 Using the Stacking TPS546C23 Two Phase Evaluation Module Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 42: Monitor Screen With 10A Total Load

    Screenshots www.ti.com Figure 34. Monitor Screen with 10A total load Using the Stacking TPS546C23 Two Phase Evaluation Module SLUUBH5 – November 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 43: Status Screen

    Selecting Status screen Figure 35 from lower left corner shows the status of the device . Figure 35. Status Screen SLUUBH5 – November 2016 Using the Stacking TPS546C23 Two Phase Evaluation Module Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...
  • Page 44 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue.
  • Page 45 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Texas Instruments TPS546C23EVM2-746...

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