Texas Instruments BQ76922EVM, User Manual

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User’s Guide
BQ76922EVM Evaluation Module
ABSTRACT
The BQ76922EVM evaluation module (EVM) is a complete evaluation system for the BQ76922, a 3-cell to 5-cell
Li-Ion battery monitor integrated circuit. The EVM consists of a BQ76922 circuit module which is used for simple
evaluation of the BQ76922 monitor function. The circuit module includes one BQ76922 integrated circuit (IC),
sense resistor, power FETs, and all other onboard components necessary to protect the cells from overcharge,
over discharge, short circuit, and overcurrent discharge in a 5-series cell Li-Ion or Li-Polymer battery pack. The
circuit module connects directly across the cells in a battery, or can be connected with a power supply and
the included cell simulator resistors. With the on-board interface or compatible external interface board and
Microsoft
®
Windows
®
based PC graphical user interface (GUI) software, the user can view the device registers,
adjust protection limits and enable FET control outputs.
Table of Contents
1 Features ................................................................................................................................................................................... 3
1.1 Kit Contents........................................................................................................................................................................ 3
1.2 Ordering Information.......................................................................................................................................................... 3
1.3 BQ76922EVM Circuit Module Performance Specification Summary................................................................................. 3
1.4 Required Equipment.......................................................................................................................................................... 3
2 BQ76922EVM Quick Start Guide ........................................................................................................................................... 4
2.1 Before You Begin............................................................................................................................................................... 4
2.2 Quick Start.......................................................................................................................................................................... 4
3 Interface Adapter .................................................................................................................................................................... 6
4 Battery Management Studio Software .................................................................................................................................. 7
4.1 System Requirements........................................................................................................................................................ 7
4.2 Installing BQStudio............................................................................................................................................................. 7
4.3 BQ76922 bqz File Installation............................................................................................................................................ 7
4.4 BQStudio Operation and Registers View........................................................................................................................... 7
4.5 Commands......................................................................................................................................................................... 9
4.6 Data Memory...................................................................................................................................................................... 9
4.7 Calibration........................................................................................................................................................................ 11
4.8 Command Sequences...................................................................................................................................................... 12
5 BQ76922EVM Circuit Module Use ....................................................................................................................................... 14
5.1 Cell Simulator................................................................................................................................................................... 14
5.2 Evaluating with Load Current........................................................................................................................................... 14
5.3 Evaluating Charge and Discharge Currents..................................................................................................................... 14
5.4 Evaluating with Simulated Current................................................................................................................................... 15
5.5 Reducing the Cell Count.................................................................................................................................................. 15
5.6 Connecting Cells.............................................................................................................................................................. 16
5.7 Connecting to a Host........................................................................................................................................................ 17
5.8 Hardware Configuration................................................................................................................................................... 18
5.9 Configuration Register Programming............................................................................................................................... 18
6 BQ76922EVM Circuit Module Physical Construction ........................................................................................................ 20
6.1 Board Layout.................................................................................................................................................................... 20
6.2 Bill of Materials................................................................................................................................................................. 25
6.3 REACH Compliance......................................................................................................................................................... 28
6.4 Schematic........................................................................................................................................................................ 29
7 Related Documents from Texas Instruments ..................................................................................................................... 32
8 Revision History ................................................................................................................................................................... 32
www.ti.com Table of Contents
SLVU957A – SEPTEMBER 2019 – REVISED NOVEMBER 2021
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