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User ' s Guide
SLUU655 – October 2011
bq27620 EVM: Single-Cell Impedance Track Technology
This evaluation module (EVM) is a complete evaluation system for the bq27620. The EVM includes one
bq27620 circuit module, a current sense resistor, an EV2300 PC interface board for gas gauge interface,
a PC USB cable, and Windows
™ -based PC software. The circuit module includes one bq27620 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 bq27620 data registers, program the chipset for different pack
configurations, log cycling data for further evaluation, and evaluate the overall functionality of the bq27620
solution under different charge and discharge conditions. The latest Windows TM
– based PC software
can be downloaded from the product folder on the Texas Instruments Web site.
Contents
1 Features
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2
1.1 Kit Contents
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2
1.2 Ordering Information
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2
2 bq27620-Based Circuit Module
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3
2.1 Circuit Module Connections
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3
2.2 Pin Description
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3
3 bq27620 Circuit Module Schematic
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3
3.1 Schematic
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3
4 Circuits Module Physical Layout and Bill of Material
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3
4.1 Board Layout
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3
4.2 Bill of Material
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4.3 Schematic
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7
4.4 bq27620 Circuits Module Performance Specification Summary
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8
5 EVM Hardware and Software Setup
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8
5.1 System Requirements
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8
5.2 Software Installation
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8
6 Troubleshooting Unexpected Dialog Boxes
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7 Hardware Connection
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8
7.1 Connecting the bq27620 Circuit Module to a Battery Pack
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8
7.2 PC Interface Connection
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9
8 Operation
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9
8.1 Starting the Program
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9
8.2 Setting Programmable bq27620 Options
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10
9 Calibrate Screen
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12
9.1 To Calibrate the bq27620
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12
9.2 Voltage Calibration
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9.3 Temperature Calibration
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10 I2C Pro Screen
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13
10.1 I2C Communication
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11 Related Documentation from Texas Instruments
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13
List of Figures
1 bq27620EVM Layout – Silk Screen
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4
2 bq27620EVM Layout – Top Assembly
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4
3 bq27620EVM Layout – Top Layer
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5
1 SLUU655 – October 2011 bq27620 EVM: Single-Cell Impedance Track Technology
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