Datasheet

User's Guide
SLUU514–July 2011
bq76925EVM Evaluation Module
This user's guide for the bq76925EVM evaluation module can assist designers in their evaluation of the
bq76925, Analog Front End for 3- to 6-Series Lithium-Ion Cells. This guide discusses setup and operation
of the module and contains schematics, bill of materials, and printed-circuit board layout.
Before designing a battery management system with the bq76925, designers are advised to read the
bq76925 data sheet (SLUSAM9).
Contents
1 Overview ..................................................................................................................... 4
1.1 Features ............................................................................................................. 4
1.2 Kit Contents ......................................................................................................... 4
1.3 Equipment Requirements ......................................................................................... 4
2 Circuit Details and Configuration .......................................................................................... 6
2.1 Connections ........................................................................................................ 6
2.2 Configuration Jumpers and Switches (J1 – J6, S2, S4) ...................................................... 8
2.3 Pushbuttons (S1, S3) ............................................................................................ 10
2.4 Test Points ........................................................................................................ 10
2.5 bq76925 ........................................................................................................... 11
2.6 MSP430F2122 .................................................................................................... 11
3 Quick-Start Demonstration ............................................................................................... 11
3.1 Evaluation Software and USB-TO-GPIO Adapter ............................................................ 11
3.2 Configuration Switches and Jumpers .......................................................................... 12
3.3 Power to the bq76925EVM ...................................................................................... 12
3.4 Connect USB-TO-GPIO Adapter ............................................................................... 12
3.5 bq76925 Evaluation Software ................................................................................... 13
4 Control Register Demonstration ......................................................................................... 16
4.1 View Control Registers .......................................................................................... 16
4.2 Control Registers Introduction .................................................................................. 18
4.3 Modifying Control Registers ..................................................................................... 19
4.4 Sleep Mode and Wake Up ...................................................................................... 19
5 Control Panel Demonstration ............................................................................................ 21
5.1 Access to the Control Panel .................................................................................... 21
5.2 Measurement Tab ................................................................................................ 22
5.3 Analog Output Section ........................................................................................... 22
5.4 VCOUT Readings ................................................................................................ 23
5.5 VIOUT Readings .................................................................................................. 23
5.6 Auto Control ....................................................................................................... 23
5.7 EEPROM Correction Registers ................................................................................. 24
5.8 Startup Config Tab ............................................................................................... 24
5.9 Configuration Control ............................................................................................ 24
5.10 Power Control ..................................................................................................... 25
5.11 Logging Tab ....................................................................................................... 25
5.12 Log File ............................................................................................................ 26
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SLUU514–July 2011 bq76925EVM Evaluation Module
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