1
Features
1.1
Kit Contents
1.2
Ordering Information
2
bq20z65-Based Circuit Module
2.1
Circuit Module Connections
2.2
Pin Descriptions
Features
www.ti.com
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Complete evaluation system for the bq20z65 SBS 1.1-compliant advanced gas gauge with Impedance
Track™ technology and bq29412 independent overvoltage protection IC
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Populated circuit module for quick setup
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Software that allows data logging for system analysis
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bq20z65/bq29412 circuit module
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Set of support documentation
Table 1. Ordering Information
EVM PART NUMBER
CHEMISTRY
CONFIGURATION
CAPACITY
bq20z65EVM-001
Li-ion
2, 3, or 4 cell
Any
The bq20z65/bq29412-based circuit module is a complete and compact example solution of a bq20z65
circuit for battery management and protection of Li-ion or Li-polymer packs. The circuit module
incorporates a bq20z65 battery monitor IC, bq29412 independent overvoltage protection IC, and all other
components necessary to accurately predict the capacity of 2-, 3-, or 4-series cells.
Contacts on the circuit module provide the following connections:
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Direct connection to the cells: 1N (BAT-), 1P, 2P, 3P, 4P (BAT+)
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To the serial communications port (SMBC, SMBD)
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The system load and charger connect across PACK+ and PACK-
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To the system-present pin (SYS PRES)
PIN NAME
DESCRIPTION
1N
-ve connection of first (bottom) cell
1P
+ve connection of first (bottom) cell
2P
+ve connection of second cell
3P
+ve connection of third cell
4P
+ve connection of fourth (top) cell
SMBC
Serial communication port clock
SMBD
Serial communication data port
SYS PRES
System present pin (if low, system is present)
PACK-
Pack negative terminal
VSS
Pack negative terminal
PACK+
Pack positive terminal
Impedance Track, bqEasy are trademarks of Texas Instruments.
Windows is a trademark of Microsoft Corporation.
2
bq20z65EVM-001 SBS 1.1 Impedance Track™ Technology
SLUU353 – June 2009
Enabled Battery Management Solution Evaluation Module
