Texas Instruments Track bq27520EVM, User Manual

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User's Guide
SLUU426 – June 2010
bq27520EVM With System-Side, Single-Cell Impedance
Track™ Technology
This evaluation module (EVM) is a complete evaluation system for the bq27520. The EVM includes one
bq27520 circuit module, a current sense resistor, one thermistor, an EV2300 PC interface board for gas
gauge interface and a PC USB cable. The circuit module includes one bq27520 integrated circuit and all
other onboard components necessary to monitor and predict capacity for a system-side fuel gauge
solution. The circuit module connects directly across the battery pack. With the EV2300 interface board
and software, the user can read the bq27520 data registers, program the chipset for different pack
configurations, log cycling data for further evaluation, and evaluate the overall functionality of the bq27520
solution under different charge and discharge conditions. The latest Windows™-based PC software can
be downloaded from the product folder on the Texas Instruments Web site.
Contents
1 Features
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2 bq27520-Based Circuit Module
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3 Circuit Module Physical Layouts, Bill of Materials, and Schematic
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4 EVM Hardware and Software Setup
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5 Troubleshooting Unexpected Dialog Boxes
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6 Hardware Connection
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7 Operation
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8 Calibrate Screen
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9 I2C Pro Screen
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10 bqEASY™ Software
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11 Related Documentation From Texas Instruments
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List of Figures
1 bq27520EVM-001 Layout – Silk Screen
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2 Top Assembly
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3 Top Layer
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4 Bottom Layer
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5 Schematic
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6 bq27520 Circuit Module Connection to Cell and System Load/Charger
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7 DataRAM Screen
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8 Data Flash Screen
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9 Calibration Screen
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10 I2C Pro Screen
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11 bqEASY™ Welcome Screen
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12 bqEASY™ Flowchart
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13 Load and Switch
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List of Tables
1 Ordering Information
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2
bqEASY, Impedance Track are trademarks of Texas Instruments.
Windows, Microsoft are trademarks of Microsoft Corporation.
I
2
C is a trademark of Philips Corporation.
1 SLUU426 – June 2010 bq27520EVM With System-Side, Single-Cell Impedance Track™ Technology
Copyright © 2010, Texas Instruments Incorporated