Using the TPS53667EVM-769 - TI.com

1 1 SLUUBH9 May 2017 Submit Documentation FeedbackCopyright 2017, Texas Instruments IncorporatedUsing the TPS53667 EVM-769, 6-Phase, D-CAP+ Step-Down, DC-DC Analogwith PMBus InterfaceUser's GuideSLUUBH9 May 2017 Using the TPS53667 EVM-769, 6-Phase, D-CAP+ Step-Down, DC-DC Analog with PMBus InterfaceThis User Guide describes the evaluation module (EVM) for the TPS53667 analog power controller, adriverless D-CAP+ buck controller, which manages six 30-A phases of the CSD95490, a NexFet Smart Synchronous Buck Power Stage. In addition, this document provides instructions for accessing thecontroller s non-volatile memory (NVM)

2 With the integrated PMBus interface to allow access to additionalconfiguration, monitoring and control Performance Test and Configuration Test Recommended Test USB Interface Adapter and List of Test Points and Configuration Using the Fusion Configuration Line/Load Regulation and Efficiency Measurement Control Loop Gain and Phase Measurement Equipment Turn-on and Data and Typical Characteristic Assembly Drawing and PCB List of Fusion DescriptionThe TPS53667 EVM-769 implements a typical application for a low-voltage.

3 High current single outputpower converter, operating from a nominal 12-V input rail to produce a output rail at up to 180 A ofload current. The EVM includes test points for evaluating the performance of the TPS53667 controller andCSD95490 power the ease of evaluation, the EVM is supplied Using the pin-strapped configuration mode and requiresonly two (12-V and 5-V) input supplies and an output load to get started with testing. With the addition ofthe Fusion Digital Power Designer software download, the EVM s PMBus interface allows access tothe controller NVM for evaluation of additional configuration, control and monitoring possibilities.

4 Refer tothe TPS53667 datasheet (SLUSC40) for complete information on configuring multi-phase operation withthis May 2017 Submit Documentation FeedbackCopyright 2017, Texas Instruments IncorporatedUsing the TPS53667 EVM-769, 6-Phase, D-CAP+ Step-Down, DC-DC Analogwith PMBus Interface2 Typical Applications ASIC power in communications equipment High density power solutions Server power Smart power Features Regulated output up to 180-A DC steady state output current Programmable settings available through PMBus interface Output voltage trim Output voltage margin levels (High / Low)

5 Within a maximum range UVLO protection threshold Soft-start slew-rate Device enable and disable Overcurrent warning and fault limits SW frequency BOOT voltage Convenient test points for probing critical waveforms3 Electrical Performance SpecificationsTable 1. TPS53667 EVM-769 Electrical Performance SpecificationsPARAMETERTEST CONDITIONSMINTYPMAX UNITSINPUT CHARACTERISTICSVINV oltage range81214 VIIN(max)Maximum input currentVIN= 8 V, IOUT= 180 A26 ANo load input currentVIN= 14 V, IOUT= 0 A125mAOUTPUT CHARACTERISTICSVOUTO utput load current0180 AOutput voltage line regulation8 V VIN 14 voltage load regulation0 A IOUT 180 voltage rippleVIN= 12 V, IOUT= 180 overcurrent protection(OCP)

6 185 ASYSTEMS CHARACTERISTICSfSWSwitching frequencyVIN= 12 V500kHzPeak efficiencyVIN= 12 V, IOUT= 100 efficiencyVIN= 12 V, IOUT= 180 temperature25 May 2017 Submit Documentation FeedbackCopyright 2017, Texas Instruments IncorporatedUsing the TPS53667 EVM-769, 6-Phase, D-CAP+ Step-Down, DC-DC Analogwith PMBus Interface4 SchematicFigure 1. TPS53667 EVM-769 - Controller May 2017 Submit Documentation FeedbackCopyright 2017, Texas Instruments IncorporatedUsing the TPS53667 EVM-769, 6-Phase, D-CAP+ Step-Down, DC-DC Analogwith PMBus InterfaceFigure 2.

7 TPS53667 EVM-769 - Power Stages 1 - 6 May 2017 Submit Documentation FeedbackCopyright 2017, Texas Instruments IncorporatedUsing the TPS53667 EVM-769, 6-Phase, D-CAP+ Step-Down, DC-DC Analogwith PMBus InterfaceFigure 3. TPS53667 EVM-769 - VIN, 5 VIN and AUX Voltages SchematicTest May 2017 Submit Documentation FeedbackCopyright 2017, Texas Instruments IncorporatedUsing the TPS53667 EVM-769, 6-Phase, D-CAP+ Step-Down, DC-DC Analogwith PMBus Interface5 Test Test and Configuration SoftwareThe Texas Instruments Fusion Digital Power Designer software can expand the functionality of the download this software, visit theDigital Power DescriptionThe Fusion Digital Power Designer is a graphical user interface (GUI)

8 Used to configure, control andmonitor the TPS53667 controller on the EVM. The software uses the PMBus protocol to communicatewith the controller over a serial bus by way of the TI USB-to-GPIO Interface Adapter (seeFigure 5). TI Fusion Digital Power Designer FeaturesThe software offers these features: Turn on or off the power supply output, either through the hardware control line or the PMBus Operation command. Monitor real-time data. Items such as input voltage, output voltage, output current, temperature,warnings and faults are continuously monitored and displayed by the GUI.

9 Configure common operating characteristics such as output voltage trim and margin, VINUVLO, soft-start slew rate, switching frequency, and warning and fault Test Voltage SourcesTwo DC input voltage sources are needed (VIN and 5 VIN). The VIN input voltage source should be a 0 Vto 14 V variable DC source capable of supplying 30 Adc. The 5 VIN input voltage source should be a 5 Vfixed DC source capable of supplying 1 Adc. Connect VIN to J1, J2 and connect 5 VIN to J19 as shown inFigure MultimetersIt is recommended to use two separate multimeters, one meter to measure VINand the other to Output LoadAn electronic load is recommended for the test setup as shown inFigure 4.

10 The load should be capable ofsinking 180 A at 1 OscilloscopeUse an oscilloscope to measure output noise and ripple. Use a coaxial cable to measure output rippleacross the output ceramic capacitor, FanDuring prolonged operation at high load, it may be necessary to provide forced air cooling with a small fanaimed at the EVM. Maintain the temperature of the devices on the EVM under 105 USB-to-GPIO Interface AdapterA communications adapter is required between the EVM and the host computer. This EVM is designed touse the Texas Instruments USB-to-GPIO adapter, seeFigure 5.