TMS320C2000 DC/DC Kit QS Guide Datasheet by Texas Instruments

I TEXAS INSTRUMENTS

Quick Start GuideSPRUFR7 – July 2008

TMS320C2000 DSC DC/DC Developer’s Kit

Providing a great way to experiment and learn about digital power control, the TMS320C2000™ DC/DCDeveloper’s Kit highlights the TMS320C28x™ digital signal controller (DSC) as a multi-rail controller formulti-phase applications. This kit contains a power motherboard which has eight TI PowerTrain™modules, small and efficient 10 Amp synchronous buck power stages, and can interface with any of the TIplug-in controlCARDs. The board requires a single 9-V DC supply and has a separately switched andfused rail as the input voltage bus to the Buck modules. This allows for safe, convenient softwareexperimentation and debug without the risk of hardware damage. The software package for this kit usesthe TMS320F28x DSC to digitally control the output voltage, ramp rates and sequence timing for each ofthe eight DC/DC voltage rails.

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TEXAS INSTRUMENTS

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Features of the DC/DC Developer’s Kit include:•Eight non-isolated 10-Amp SyncBuck DC/DC power stages (no heat-sink required)with built in MOSFET drivers•Closed loop digital control with voltage feedback using F28x on-chip ePWM andADC

•Sequencing and ramp rate parameters in software allow DC/DC rails to becontrolled independently and in an organized manner•Voltage input and output measurements via ADC•Temperature measurement for each channel monitored by ADC•Current measurement for each channel monitored by ADC•Over-current protection and fault flag detection via GPIO•8 x LED indicators for diagnostics and fault status•UART communications header available for host control•Host GUI, a friendly way to control / demo the application, based on open sourceC# freeware

•Hardware Developer’s Package is available and includes schematics, bill ofmaterials, Gerber files, …etc

CAUTION

During experimentation the lamp loads (LMP1-LMP8 – seeHardware Overview) may become HOT if output voltagesare left running for an extended time (avoid if possible). DONOT TOUCH until the loads cool down.

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1 Hardware Overview

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Hardware Overview

The DC/DC Developer’s Kit consists of eight identical buck power stages. The input bus voltage for allstages is 9 V. Shown below is a diagram of the DC/DC Developer’s Kit board and some key features.

Table 1. Hardware Components

Component Description

9V In DC power supply from plug pack (12V supply may also be used)

Main Pwr SW1 – Master power switch for entire EVM

DC Bus SW2 – Power switch for Vin to buck stages only. When off the DIMM controller card will still operate (next tothe DC bus switch is a resettable fuse)

Buck 1-8 Buck power stage modules with temperature/current measurement and over current protection

Load 1-8 Load terminals and/or buck converter output - next to each terminal block is a light bulb or “visual” load (thesedraw approx 300 mA hot)

Active Load 1/2 Switched loads controlled by the ECAP peripheral via software. These loads are connected to the output ofbuck 1 & 5 respectively. PR1, PR2, or PR3 will need to be populated for each active load module to functioncorrectly. (ECAP peripheral not available on F28044)

DMM Header Provides convenient access to the outputs of the eight buck converters

Emulator Pwr Sets the voltage sent to power the emulator. No jumper means no power will be sent to an emulator, a jumperat 5V will power the emulator with 5 V, and a jumper at 3V3 will power the emulator with 3.3 V.

Boot Jumpers Controls how the F280x will boot.•If no jumpers are placed the target will boot from flash.•If a jumper is placed at 34, the target will boot from the SCI.•If a jumper is placed at 29 and 34, the target will boot from RAM.

Comms Serial communications UART (allows connection to the external GUI)

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2 Hardware Set Up

2.1 Test drive with GUI – (skip if you need only emulation support)

2.2 Code Composer Studio Software Development Platform Emulation - Additional Steps

Hardware Set Up

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All the hardware needed to get started (except the emulator) is included in this package (suggestedemulators are listed near the end of this document). The application-specific motherboard provided in thiskit can be used in one of two ways:

1. Test Drive – Using the provided GUI application, the user does not require Code Composer Studio™software or emulation tools. This provides a great way to run or demo the application code quickly andsee what functionality the hardware offers. Note: exactly the same functionality can be achieved byusing the Code Composer Studio Watch Window and slider features during emulation in the secondmode.

2. Code Composer Studio Software Development Platform – With the project code provided, theapplication can be modified, compiled, loaded and run in a development environment. Code ComposerStudio and Emulation HW tools are required for this.

Follow these steps to set up the hardware for either the GUI or Software Development Platform:

Step 1. Unpack the DIMM style controlCARD.

Step 2. Spread open the winged retaining clips on connector J2.

Step 3. Sit the DIMM card loosely in the connector slot. Align the 2 keyed notches carefully andposition the card bottom corners inside the retaining clips (see picture below).

Step 4. Push vertically down using even pressure from both ends of the card until the clips snap andlock. (note: to remove or eject the card simply spread open the retaining clips with thumbs).

Step 5. Be sure switch 1 (SW1) is in the off position and connect the included power supply to thepower jack.

Step 1. Plug in the serial cable provided to connector J4 making sure the red wire aligns with the Rxpin on EVM.

Step 2. Insert a jumper in position 34 on the board’s boot pins.

Step 3. Plug the DB9 connector into your PC using either a serial port or a serial-to-USB converterdongle.

Step 4. Turn on the power once you are done with the TI Software download (see Software Set UpGUI-TestDrive).

Step 1. Depending on your emulator type, place the jumper at J2 to either the 3.3-V or 5-V position.

Step 2. Connect the JTAG emulator cable to connector J1.

Step 3. Turn on power once you are done with the TI Software download, see Software Set Up -Code Composer Studio Development. For full details (schematics, pin-out table, etc) of thehardware see the Hardware Developer’s Package, EightChBuck-HWdevPkg. See SoftwareSet Up for the download location.

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TEXAS INSTRUMENTS http://www.ti.com/f28xkits http://www.ti.com/f28xkits

3 Software Set Up

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Software Set Up

The DC/DC Developer’s Kit application software example, GUI, step-by-step lab style documentation, andother useful soft collateral is available on the TI website. If you already have your own software projectand do not require this collateral, skip this section. As explained in the hardware set up section, the targetmother board can be run either with the GUI or Code Composer Studio. The GUI executable file is foundas part of the main software download. Follow the steps below for either case.

To run any of the application-specific software in Code Composer Studio, first you must install thebaseline code, which contains the header files, libraries, etc. If you already have the baseline softwareinstalled, skip the baseline install steps and go to the DC/DC Developer’s Kit section.

To download the free TI soft collateral follow these steps:

Step 1. Baseline soft collateral and hardware documents (skip this if you already have this softwareinstalled)

a. On an Internet browser type: http://www.ti.com/f28xkitsb. At the C2000™ DSP collateral page, choose the Experimenter’s Kit download linkc. When prompted, fill in the TI customer registration details and click okd. Save the .zip file to the directory of your choicee. Unzip the file and run the install program Baseline Software Set Upf. The installer will create the following default directories:

C:\TI_F28xxx_SysSW

~Docs

~GeneralPurposeGUI

~SupportFiles

FlashingLeds

C:\TI_F28xxx_SysHW

CC280xxHWdevPkg

CC2833xHWdevPkg

DockingStnHWdevPkg

Step 2. DC/DC Developer’s Kit soft collateral and hardware documents

a. On an Internet browser type: http://www.ti.com/f28xkitsb. Then choose the DC/DC Developer’s Kit link.c. When prompted, fill in the TI customer registration details and click ok.d. Save the .zip file to the directory of your choice.e. Unzip the file and run the install program Eight Channel Buck Software Set Up.f. The installer will create the following default directories:

C:\TI_F28xxx_SysSW

EightChannelBuck

~Docs

~GUI

C:\TI_F28xxx_SysHW

EightChBuck-HWdevPkg

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TEXAS INSTRUMENTS hug://www.b|ackhawkrdsg.com htlg://www.Sgectrumdigitalcom mtg://www.Ii.com/128>

4 Running the Application

5 Emulators

6 References

Trademarks

Running the Application

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To run the application specific hardware, choose either TestDrive-GUI or CCS-Development options belowand follow the appropriate steps.

Step 1. TestDrive-GUI

a. Open the GUI Quick Start Guide, QSG-EightChannelBuck-GUI.pdf, found in:C:\TI_F28xxx_SysSW\EightChannelBuck\~Docs\

b. Go to directory C:\TI_F28xxx_SysSW\EightChannelBuck\~GUI

c. Open EightChannelBuck-GUI.exe

d. Follow the step-by step instructions found in the Quick Start Guide

Step 2. Code Composer Studio - Development

a. If you have emulation tools and Code Composer Studio already installed and active, loadthe project file EightChannelBuck.pjt found in:C:\TI_F28xxx_SysSW\EightChannelBuck\

b. See the EightChannelBuck.pdf for a step-by-step walk through of how to compile and runthe various labs. This document can be found inC:\TI_F28xxx_SysSW\EightChannelBuck\~Docs\.

The following companies provide low cost, full featured emulators designed specifically for C2000™controllers:

Blackhawk™ USB2000 Controller (part number TMDSEMU2000U)

http://www.blackhawk-dsp.com

$299

Spectrum Digital XDS510LC JTAG Emulator (part number 701902)

http://www.spectrumdigital.com

$249

For more information, see the following guides:•EightChannelBuck – provides detailed information on the EightChannelBuck project within an easy touse lab-style format.C:\TI_28xxx_SysSW\EightChannelBuck\~Docs\EightChannelBuck.pdf

•QSG-EightChannelBuck-GUI – gives an overview on how to demo the EightChannelBuck projectquickly using an intuitive GUI interface.C:\TI_28xxx_SysSW\EightChannelBuck\~Docs\QSG-EightChannelBuck-GUI.pdf

•EightChBuck-HWdevPkg – a folder containing various files related to the hardware on the DC/DCDeveloper’s Kit board (schematics, bill of materials, Gerber files, PCB layout, etc). All schematics andPCB files created with the freeware ExpressPCB package.C:\TI_28xxx_SysHW\EightChBuck-HWdevPkg\

•F28x User’s Guides http://www.ti.com/f28xuserguides

TMS320C2000, TMS320C28x, PowerTrain, Code Composer Studio, C2000 are trademarks of TexasInstruments.

Blackhawk is a trademark of EWA Technologies, Inc.

All other trademarks are the property of their respective owners.

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