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Calibration Screen

Figure 12. Calibration Screen

17

SLUU494 – February 2011

bq28400EVM-001 SBS 1.1 Compliant Tablet PC and Netbook 2-Series Cell

Li-Ion Battery Gas Gauge and Protection

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© 2011, Texas Instruments Incorporated

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Содержание bq28400EVM-001

Страница 1: ...luation and evaluate the overall functionality of the bq28400 bq29200 solution under different charge and discharge conditions empty paras to force the title List of Tables to second page empty Contents 1 Features 2 2 bq28400 Based Circuit Module 2 3 bq28400 Circuit Module Schematic 3 4 Circuit Module Physical Layouts and Bill of Materials 4 5 EVM Hardware and Software Setup 11 6 Troubleshooting U...

Страница 2: ... 001 Li ion 2 cell Any 2 bq28400 Based Circuit Module The bq28400 bq29200 based circuit module is a complete and compact example solution of a bq28400 circuit for battery management and protection of Li ion or Li Polymer packs The circuit module incorporates a bq28400 battery monitor IC bq29200 independent overvoltage protection IC with automatic cell balancing and all other components necessary t...

Страница 3: ...00 implementation 3 1 Schematic The schematic follows the bill of materials in this user s guide see Section 4 2 NOTE The optional Zener diode D3 and resistor R21 on the PRES pin which are only required if PRES has a chance to short to PACK 3 2 Testing Fuse Blowing Circuit To prevent the loss of board functionality during the fuse blowing test the actual chemical fuse is not provided in the circui...

Страница 4: ...sistor R21 on the PRES pin are only required if PRES has a chance to short to PACK 4 1 Board Layout This section shows the dimensions PCB layers Figure 1 through Figure 7 and assembly drawings for the bq28400 module Figure 1 bq28400EVM 001 Layout Silk Screen Figure 2 Top Assembly 4 bq28400EVM 001 SBS 1 1 Compliant Tablet PC and Netbook 2 Series Cell SLUU494 February 2011 Li Ion Battery Gas Gauge a...

Страница 5: ...igure 3 Top Layer Figure 4 Internal Layer 1 Figure 5 Internal Layer 2 5 SLUU494 February 2011 bq28400EVM 001 SBS 1 1 Compliant Tablet PC and Netbook 2 Series Cell Li Ion Battery Gas Gauge and Protection Submit Documentation Feedback 2011 Texas Instruments Incorporated ...

Страница 6: ...www ti com Figure 6 Bottom Layer Figure 7 Bottom Assembly 6 bq28400EVM 001 SBS 1 1 Compliant Tablet PC and Netbook 2 Series Cell SLUU494 February 2011 Li Ion Battery Gas Gauge and Protection Submit Documentation Feedback 2011 Texas Instruments Incorporated ...

Страница 7: ...79 0519 Molex Mini AB 5 pins Inches 1 JP1 PEC03SAAN Header Male 0 100 inch x 3 PEC03SAAN Sullins 3 pin 100 mil spacing 1 Q1 FDN339AN MOSFET N ch SOT23 FDN339AN Fairchild 20 V 3A 0 05 Ohms 2 Q2 Q3 Si7409ADN MOSFET Fast PWRPAK 1212 Si7409ADN Vishay Switching PChan 30 V 7A 0 031 ohm 1 Q4 Si2343DS MOSFET Pch SOT23 Si2343DS Vishay 30 V 4 A 53 milliohm 6 R1 R2 R3 R4 1K Resistor Chip 0603 Std Std R24 R26...

Страница 8: ...inch 5015 Keystone TP8 TP11 TP12 TP13 TP14 TP15 TP16 1 U1 BQ28400PW IC Battery TSSOP BQ28400PW TI Charger Controller 1 U2 BQ29200DRB IC Voltage VSON BQ2920xDRB TI Protection with Auto Cell Balance For 2 Cell Li Ion Batteries 1 PCB HPA699 Any Qty Connector 2 J1 mate Connector Molex 22 01 3047 Female 0 100 Centers 8 N A Terminals Crimp Molex 08 50 0114 Tin N A Wire Insulated 24 Alpha 1854 3 Awg Red ...

Страница 9: ... substituted All other components can be substituted with equivalent MFG s components 5 Make one SMBus connector wire assembly for each assembly produced from J1 mate 4 24 Awg wires and Crimp terminals Wire colors for Pin numbers are listed below The wire assembly shall have a J1 mate on each end Red Pin 4 Signal USB_5V Brown Pin 3 Signal SDA White Pin 2 Signal SCL Black Pin 1 GND 9 SLUU494 Februa...

Страница 10: ... of Materials www ti com Figure 8 Schematic 10 bq28400EVM 001 SBS 1 1 Compliant Tablet PC and Netbook 2 Series Cell SLUU494 February 2011 Li Ion Battery Gas Gauge and Protection Submit Documentation Feedback 2011 Texas Instruments Incorporated ...

Страница 11: ...mporary directory The executable filename can consist of several component names and versions Double click on the executable filename and follow the installer instructions to complete the bq28400 EVM installation 3 If the EV2x00 was not previously installed after bq28400 EVM installation a TI USB DRIVER INSTALLER pops up Click Yes for the agreement message and follow its instructions 4 Plug the EV...

Страница 12: ...C follow these steps 1 Connect the bq28400 based smart battery to the EV2x00 using wire leads as shown in Table 4 Table 4 Circuit Module to EV2x00 Connections bq28400 Based Battery EV2x00 SMBD SMBD SMBC SMBC VSS GND 2 Connect the PC USB cable to the EV2x00 and the PC USB port The bq28400 is now set up for operation 12 bq28400EVM 001 SBS 1 1 Compliant Tablet PC and Netbook 2 Series Cell SLUU494 Feb...

Страница 13: ... are selected for scanning are scanned within this period The bq Gas Gauge Evaluation Software provides a logging function that logs the values that were last scanned by the EVSW To enable this function select the Start Logging button which causes the Keep Scanning button to be selected When logging is Stopped the Keep Scanning button is still selected and must be manually unchecked The logging in...

Страница 14: ...tab available at the bottom of the screen To change the height of the Flags Static Data display drag the splitter bar the line that separates the Flags Static data from SBS values To return the splitter bar to its original location select View then Auto Arrange 8 2 Setting Programmable bq28400 Options NOTE It is very important to have the correct setting of these options to get the best performanc...

Страница 15: ...entire tab of flash data or select the menu option Data Flash Write All The data flash must be read before any writes are performed to avoid any incorrect data being written to the device The File Special Export menu options allow the data flash to be exported but it configures the exported data flash to a learned state ready for mass production use The data flash configuration can be saved to a f...

Страница 16: ...9 2 To Calibrate the bq28400 1 Select the types of calibration see Figure 12 2 Enter the measured values for the types selected 3 If Voltage Calibration is selected enter the number of cells on the pack and individual cell voltage 4 For Temperature Calibration select the sensor that is to be calibrated and enter the actual temperature Select Calibrate Voltage and Temperature to start calibration 5...

Страница 17: ...n Figure 12 Calibration Screen 17 SLUU494 February 2011 bq28400EVM 001 SBS 1 1 Compliant Tablet PC and Netbook 2 Series Cell Li Ion Battery Gas Gauge and Protection Submit Documentation Feedback 2011 Texas Instruments Incorporated ...

Страница 18: ...y cause erroneous results When scaling converted hexadecimal values to a higher number of bytes follow these rules When unsigned is selected the left pad contains zeroes When signed is selected the left pad contains zeroes for a positive number or the left pad contains F for negative numbers 10 3 Programming The Pro Advanced Screen enables device reprogramming from unencrypted and encrypted files ...

Страница 19: ...ommended assembly sequence for a bq28400 based battery pack This procedure results in the most time efficient setup of the battery pack 19 SLUU494 February 2011 bq28400EVM 001 SBS 1 1 Compliant Tablet PC and Netbook 2 Series Cell Li Ion Battery Gas Gauge and Protection Submit Documentation Feedback 2011 Texas Instruments Incorporated ...

Страница 20: ...nd wake up the EVM from shutdown mode 5 Connect the SMBus connector J2 to the EV2x00 adapter and start the EV software 6 Navigate to the Flash Screen Change the flash constants that correspond to the specific parameters of your application refer to the data sheet or other application reports For the first evaluation the default values may be used 7 Navigate to the Calibration screen Follow the pro...

Страница 21: ...oduct This notice contains important safety information about temperatures and voltages For additional information on TI s environmental and or safety programs please contact the TI application engineer or visit www ti com esh No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine process or combination in which such TI products ...

Страница 22: ...horized for use in safety critical applications such as life support where a failure of the TI product would reasonably be expected to cause severe personal injury or death unless officers of the parties have executed an agreement specifically governing such use Buyers represent that they have all necessary expertise in the safety and regulatory ramifications of their applications and acknowledge ...

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