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SLUUBF5–April 2016
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Copyright © 2016, Texas Instruments Incorporated
bq27220EVM-744 Evaluation Module
Microsoft, Windows are registered trademarks of Microsoft Corporation.
User's Guide
SLUUBF5–April 2016
bq27220EVM-744 Evaluation Module
This evaluation module (EVM) is a complete evaluation system for the bq27220. This EVM includes one
bq27220 circuit module, an external current sense resistor. A separate orderable EV2300 or EV2400 PC
interface board for gas gauge along with a PC USB cable, and Microsoft
®
Windows
®
based PC software is
needed when using this EVM. The circuit module includes one bq27220 integrated circuit and all other
onboard components necessary to monitor and predict capacity for a system-side or removable battery
pack fuel-gauge solution. With the EV2300 or EV2400, users can:
• Read the bq27220 data registers
• Program the chipset for different configurations
• Log cycling data for further evaluation
• Evaluate the overall functionality under different charge and discharge conditions
Contents
1 Features....................................................................................................................... 2
1.1 Kit Contents.......................................................................................................... 2
1.2 Ordering Information ............................................................................................... 2
1.3 bq27220 Circuits Module Performance Specification Summary.............................................. 2
2 bq27220EVM Quick Start Guide........................................................................................... 3
2.1 Items Needed for EVM Setup and Evaluation .................................................................. 3
2.2 System Requirements.............................................................................................. 3
2.3 Software Installation................................................................................................ 3
2.4 Troubleshooting Unexpected Dialog Boxes..................................................................... 3
2.5 EVM Connections................................................................................................... 3
2.6 PC Interface Connection........................................................................................... 5
3 Operation ..................................................................................................................... 6
3.1 Starting the Program ............................................................................................... 6
3.2 Setting Programmable bq27220 Options........................................................................ 7
3.3 Calibration ........................................................................................................... 8
3.4 Setting the CEDV Parameters .................................................................................... 9
4 Circuit Module Physical Layout, Bill of Materials and Schematic .................................................... 10
4.1 Board Layout....................................................................................................... 10
4.2 Bill of Materials .................................................................................................... 12
4.3 Schematic .......................................................................................................... 13
5 Related Documentation from Texas Instruments ...................................................................... 14
List of Figures
1 bq27220 Circuit Module Connection to Pack and System Load/Charger ............................................ 4
2 Registers Screen............................................................................................................. 6
3 Data Memory Screen........................................................................................................ 7
4 Calibration Screen ........................................................................................................... 8
5 CEDV Coefficients Calculation Flow ...................................................................................... 9
6 Top Silk Screen............................................................................................................. 10
7 Top Layer.................................................................................................................... 10
8 Bottom Layer................................................................................................................ 11
9 bq27220EVM Schematic .................................................................................................. 13
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