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
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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
• Populated circuit module for quick setup
• Software that allows data logging for system analysis
• bq20z65/bq29412 circuit module
• 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:
• Direct connection to the cells: 1N (BAT-), 1P, 2P, 3P, 4P (BAT+)
• To the serial communications port (SMBC, SMBD)
• The system load and charger connect across PACK+ and PACK-
• 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
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