BQ27410EVM

User's Guide SLUU482A – February 2011 – Revised August 2011 bq27410EVM: Single-Cell Impedance Track™ Technology This evaluation module (EVM) is a complete evaluation system for the bq27410. The EVM includes one bq27410 circuit module. The circuit module includes one bq27410 integrated circuit and all other onboard components necessary to monitor and predict capacity for a system-side fuel gauge solution. The circuit module connects directly across the battery pack. With the EV2300 or EV2400 interface board and software, the user can read the bq27410 data registers, program the chipset for different pack configurations, log cycling data for further evaluation, and evaluate the overall functionality of the bq27410 solution under different charge and discharge conditions. The latest Windows™– based PC software can be downloaded from the product folder on the Texas Instruments Web site. 1 2 3 4 5 6 7 8 9 10 11 Contents Features ...................................................................................................................... 3 1.1 Kit Contents ......................................................................................................... 3 1.2 Ordering Information ............................................................................................... 3 bq27410-Based Circuit Module ........................................................................................... 3 2.1 Circuit Module Connections ...................................................................................... 3 2.2 Pin Description ..................................................................................................... 3 bq27410 Circuit Module Schematic ...................................................................................... 4 3.1 Schematic ........................................................................................................... 4 Circuits Module Physical Layout and Bill of Material ................................................................... 4 4.1 Board Layout ....................................................................................................... 4 4.2 Bill of Materials ..................................................................................................... 5 4.3 Schematic ........................................................................................................... 6 4.4 bq27410 Circuits Module Performance Specification Summary ............................................. 6 EVM Hardware and Software Setup ..................................................................................... 6 5.1 System Requirements ............................................................................................. 6 5.2 Software Installation ............................................................................................... 7 Troubleshooting Unexpected Dialog Boxes ............................................................................. 7 Hardware Connection ...................................................................................................... 7 7.1 Connecting the bq27410 Circuit Module to a Battery Pack .................................................. 7 7.2 PC Interface Connection .......................................................................................... 8 Operation ..................................................................................................................... 8 8.1 Starting the Program .............................................................................................. 8 8.2 Setting Programmable bq27410 Options ....................................................................... 9 Calibrate Screen ........................................................................................................... 11 9.1 To Calibrate the bq27410 ....................................................................................... 11 9.2 CC Offset Calibration ............................................................................................ 11 9.3 Voltage Calibration ............................................................................................... 11 9.4 Temperature Calibration ......................................................................................... 11 9.5 Board Offset Calibration ......................................................................................... 11 9.6 Pack Current Calibration ........................................................................................ 11 I2C Pro Screen ............................................................................................................ 12 10.1 12C Communication ............................................................................................. 12 bqEASY™ Software ....................................................................................................... 13 11.1 Introduction ........................................................................................................ 13 bqEASY, Impedance Track are trademarks of Texas Instruments. Microsoft is a trademark of Microsoft Corporation. I2C is a trademark of Philips Electronics N.V. Corporation. SLUU482A – February 2011 – Revised August 2011 Submit Documentation Feedback bq27410EVM: Single-Cell Impedance Track™ Technology Copyright © 2011, Texas Instruments Incorporated 1 www.ti.com 12 11.2 Program Navigation and Flowchart ............................................................................ 11.3 Simplified Configuration Procedures ........................................................................... 11.4 Files ................................................................................................................ 11.5 Completion Checkmark .......................................................................................... 11.6 Device Detection .................................................................................................. Related Documentation from Texas Instruments ..................................................................... 1 bq27410EVM Layout – Silk Screen 14 15 15 16 16 16 List of Figures 2 3 4 5 6 7 8 9 10 11 12 ...................................................................................... bq27410EVM Layout – Top Assembly ................................................................................... bq27410EVM Layout – Top Layer ........................................................................................ bq27410EVM Layout – Bottom Layer .................................................................................... bq27410EVM Schematic ................................................................................................... bq27410 Circuit Module Connection to Pack and System Load/Charger ........................................... DataRAM Screen ........................................................................................................... Data Flash Screen ........................................................................................................ Calibration Screen ......................................................................................................... I2C Pro Screen ............................................................................................................ bqEASY™ Welcome Screen ............................................................................................. bqEASY™ Flow Chart .................................................................................................... 4 4 5 5 6 7 9 10 12 13 14 15 List of Tables 2 1 Ordering Information ........................................................................................................ 3 2 Bill of Materials .............................................................................................................. 5 3 Performance Specification Summary..................................................................................... 6 4 Circuit Module to EV2300 Connections .................................................................................. 8 bq27410EVM: Single-Cell Impedance Track™ Technology SLUU482A – February 2011 – Revised August 2011 Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated Features www.ti.com 1 Features • • • • • 1.1 Complete evaluation system for the bq27410 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 Kit Contents • bq27410 circuit module (HPA707) This EVM is used for the evaluation of different bq27410-based products. Ensure that you visit the product Web folder at www.ti.com to download the latest firmware version for the associated product to be evaluated. EV2300 and EV2400 can also be ordered from TI Website seperately. 1.2 Ordering Information Table 1. Ordering Information 2 EVM Part Number Chemistry Configuration Capacity bq27410EVM Li-ion 1 Cell Any bq27410-Based Circuit Module The bq27410-based circuit module is a complete and compact example solution of a bq27410 circuit for battery management. The circuit module incorporates a bq27410 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 (J1 or J6): PACK+, PACK– • To the serial communications port (J3): SDA, SCL, and VSS • The system load and charger connect across charger and load (J5 and J4): CHARGER–/LOAD– and CHARGER+/LOAD+. • Access to signal outputs (J2): BIN, and GPOUT 2.2 Pin Description Pin Name PACK+ PACK– SDA SCL VSS Description Pack positive terminal Pack negative terminal I2C™ communication data line I2C communication clock line Signal return for communication line, shared with charger and ground CHG+/LOAD+ CHG–/LOAD– BIN GPOUT High potential of load or charger connection Low potential of load or charger connection (system VSS) Battery insertion detection input General purpose output SLUU482A – February 2011 – Revised August 2011 Submit Documentation Feedback bq27410EVM: Single-Cell Impedance Track™ Technology Copyright © 2011, Texas Instruments Incorporated 3 bq27410 Circuit Module Schematic www.ti.com 3 bq27410 Circuit Module Schematic 3.1 Schematic The schematic follows the bill of materials in this user's guide. 4 Circuits Module Physical Layout and Bill of Material This section contains the board layout, bill of materials, and assembly drawings for the bq27410 circuit module. 4.1 Board Layout This section shows the printed-circuit board (PCB) layers (Figure 1 through Figure 4), and assembly drawing for the bq27410 module. Figure 1. bq27410EVM Layout – Silk Screen Figure 2. bq27410EVM Layout – Top Assembly 4 bq27410EVM: Single-Cell Impedance Track™ Technology SLUU482A – February 2011 – Revised August 2011 Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated Circuits Module Physical Layout and Bill of Material www.ti.com Figure 3. bq27410EVM Layout – Top Layer Figure 4. bq27410EVM Layout – Bottom Layer 4.2 Bill of Materials Table 2. Bill of Materials Coun RefDes t Value Description Size Part Number Mfr 3 C1, C2, C4 0.1 µF Capacitor, Ceramic, 0.1 µF, 10V, X5R 0402 GRM155R61A104KA01D Murata 1 C3 0.47 µF Capacitor, Ceramic, 0.47 µF, 6.3V, X5R 0402 GRM155R60J474KE19D Murata 1 D1 AZ23C5V6-7 Diode, Dual, Zener, 5.6 V, 300mW SOT23 AZ23C5V6-7 Diodes 2 J1, J3 22-05-3041 Header, Friction Lock Ass'y, 4-pin Right Angle 0.400 x 0.500 22-05-3041 Molex 4 J2, J4, J5, J6 ED555/2DS Terminal Block, 2-pin, 6-A, 3.5mm 0.27 x 0.25 inch ED555/2DS OST 1 R2 0.01 Resistor, Chip, 1/10W, 1%,