Table of Contents
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Features
2
Bill of Materials
3
Performance Specification Summary
4
Circuit Module to EV2300 Connections
1
Features
•
Complete evaluation system for the bq27520 gas gauge with Impedance Track™ technology
•
Populated circuit module for quick setup
•
Personal computer (PC) software and interface board for easy evaluation
•
Software that allows data logging for system analysis
•
Ability to upgrade to the latest firmware version by flash reprogramming
1.1
Kit Contents
•
bq27520 circuit module (HPA568)
•
EV2300 PC interface board
•
USB connection cable to interface board
•
NTC103AT thermistor
This EVM is used for the evaluation of different bq27520-based products. Ensure that you visit the product
Web folder at
www.ti.com
documentation for the associated product to be evaluated.
1.2
Ordering Information
EVM PART NUMBER
bq27520EVM
2
bq27520-Based Circuit Module
The bq27520-based circuit module is a complete and compact example solution of a bq27520 circuit for
battery management. The circuit module incorporates a bq27520 battery gas gauge integrated circuit (IC)
and all other components necessary to accurately predict the capacity of 1-series Li-ion cell.
2.1
Circuit Module Connections
Contacts on the circuit module provide the following connections:
•
Direct connection to the battery pack (J2 or J3): PACK+, PACK–, and TS
•
To the serial communications port (J8): SDA, SCL, and VSS
•
The system load and charger connect across charger and load (J6 and J7): CHARGER–/LOAD– and
CHARGER+/LOAD+.
•
Access to signal outputs (J5): SOC_INT, BAT_GD, and BAT_LOW
2.2
Pin Descriptions
PIN NAME
PACK+
PACK–
TS
SDA
SCL
VSS
CHG+/LOAD+
2
bq27520EVM With System-Side, Single-Cell Impedance Track™ Technology
..............................................................................................................
.....................................................................................
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to download the latest firmware version, evaluation software, and
Table 1. Ordering Information
CHEMISTRY
Li-ion
DESCRIPTION
Pack positive terminal
Pack negative terminal
Pack thermistor input that leads to IC TS pin
2
I
C™ communication data line
2
I
C communication clock line
Signal return for communication line, shared with charger and ground
High potential of load or charger connection
Copyright © 2010, Texas Instruments Incorporated
CONFIGURATION
CAPACITY
1 cell
www.ti.com
5
8
9
Any
SLUU426 – June 2010
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