Texas Instruments bq27 10EVM Series User manual

User's Guide
SLUU259A–October 2006–Revised October 2013
bq27x10EVM Single-Cell Battery Fuel Gauge
Evaluation Module
The bq27x10EVM is a complete evaluation system for the bq27x10 single-cell Li-ion and Li-polymer
battery gas gauge device.
Contents
1 Introduction .................................................................................................................. 2
2 bq27x10-Based Circuit Module ........................................................................................... 3
3 bq27x10EVM Circuit Module Schematic ................................................................................. 4
4 bq27x10EVM Circuit Module Physical Layouts ......................................................................... 5
5 bq27x10EVM Circuit Module List of Materials .......................................................................... 9
6 bq27x10EVM Circuit Module Performance Specification Summary ................................................. 9
7 EVM Hardware and Software Setup .................................................................................... 10
8 Operation ................................................................................................................... 11
List of Figures
1 bq27x10EVM Schematic................................................................................................... 4
2 bq27x10EVM Topside Assembly ......................................................................................... 5
3 bq27x10EVM Silkscreen................................................................................................... 5
4 bq27x10EVM Layer 1 Layout ............................................................................................. 6
5 bq27x10EVM Layer 2 Layout ............................................................................................. 7
6 bq27x10EVM Layer 3 Layout ............................................................................................. 8
7 bq27x10EVM Layer 4 Layout ............................................................................................. 8
8 bq27x10EVM Circuit Module Connection to Cells and System Load/Charger.................................... 10
9 Initial Register Screen .................................................................................................... 11
10 EEPROM Screen.......................................................................................................... 12
11 Pro Screen ................................................................................................................. 14
12 Calibration Screen......................................................................................................... 15
List of Tables
1 Ordering Information........................................................................................................ 2
2 Test Points................................................................................................................... 3
3 List of Materials ............................................................................................................. 9
4 Performance Specification Summary..................................................................................... 9
5 Circuit Module-to-EV2300 Connection.................................................................................. 11
6 Example Data Log......................................................................................................... 16
Windows is a registered trademark of Microsoft Corporation.
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Introduction www.ti.com
1 Introduction
The bq27x10EVM includes one bq27x10EVM circuit module, CD ROM including Windows®-based PC
software and support documentation. An EV2300 board for gas gauge evaluation is required to interface
this EVM with the PC and can be purchased separately. The circuit module includes one bq27x10, a
current sense resistor, and all other components onboard necessary to calculate remaining battery
capacity and predict system run-time to empty. The circuit module connects directly across the cell in a
battery. With the PC interface board and software, the user can read the bq27x10 data registers, program
the on-chip configuration EEPROM, and evaluate the functions of the bq27x10 under different charge and
discharge conditions.
1.1 Features
• Complete evaluation system for the bq27x10 battery gas gauge
• Populated circuit module for quick setup
• PC software and interface board for easy evaluation
• Software allows EEPROM programming and data logging for system analysis
1.2 Kit Contents
1. bq27x10EVM circuit module with sense resistor
2. CD ROM including Windows-based PC software and support documentation
3. Set of support documentation
1.3 Ordering Information
Table 1. Ordering Information
EVM PART NUMBER PC INTERFACE BOARD CHEMISTRY PACK VOLTAGE CAPACITY
bq27x10EVM USB Li-Ion 2.6 v to 4.5 V 100 to 2000 mAh
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www.ti.com bq27x10-Based Circuit Module
2 bq27x10-Based Circuit Module
The bq27x10EVM-based circuit module is an example circuit for battery fuel gauging of a single-cell Li-
ion/Li-polymer battery pack. The EVM module has two separate circuits. One is the active bq27x10 fuel
gauging circuitry; the other is the logic and power control to program the on-chip configuration EEPROM
of the bq27x10. In a typical application, only the active fuel gauging circuitry is required. The EEPROM
programming circuitry would be required in a test setup to configure the bq27x10 for the application by
programming the EEPROM.
Contacts on the circuit module provide direct connection to the cell (J1-1, J2-2), and the serial
communications port (J1-3). The system load and charger connect across J1-1 and J2-1.
Table 2. Test Points
TEST POINT SIGNAL NAME DESCRIPTION
J1-1 PACK+ Cell positive/pack positive
J1-2 SCL Used only with bq27210 as the I2C Clock line
J1-3 SDA/HDQ Single-wire HDQ line for bq27010 or I2C Data line for
bq27210
J2-1 PACK– Pack negative
J2-2 BAT– Cell negative
J3-1 21V High voltage for EEPROM programming
J3-2 PROG Input for timing of EEPROM programming pulse
J3-3 GPIO/ADIN GPIO pin of bq27x10
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bq27x10EVM Circuit Module Schematic www.ti.com
3 bq27x10EVM Circuit Module Schematic
Figure 1. bq27x10EVM Schematic
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www.ti.com bq27x10EVM Circuit Module Physical Layouts
4 bq27x10EVM Circuit Module Physical Layouts
Figure 2 through Figure 7 show the PCB layers and assembly drawing for the bq27x10EVM circuit
module.
Figure 2. bq27x10EVM Topside Assembly
Figure 3. bq27x10EVM Silkscreen
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bq27x10EVM Circuit Module Physical Layouts www.ti.com
Figure 4. bq27x10EVM Layer 1 Layout
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www.ti.com bq27x10EVM Circuit Module Physical Layouts
Figure 5. bq27x10EVM Layer 2 Layout
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bq27x10EVM Circuit Module Physical Layouts www.ti.com
Figure 6. bq27x10EVM Layer 3 Layout
Figure 7. bq27x10EVM Layer 4 Layout
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www.ti.com bq27x10EVM Circuit Module List of Materials
5 bq27x10EVM Circuit Module List of Materials
Table 3 contains the list of materials required for the bq27x10EVM circuit module.
Table 3. List of Materials
REF DES 27010 27210 DESCRIPTION MFR PART NUMBER
QTY QTY
C1, C2, 5 5 Capacitor, ceramic, 0.1 μF, 10 V, X5R, 402 Murata GRM155R61A104KA01D
C3, C4,
C5
D1, D3 2 2 Diode, Zener, 5.6 V, 350 mW, SOT23 Diodes, Inc. BZX84C5V6T
D2 1 1 Diode, Dual, Zener, 5.6 V, 300 mW, SOT23 Diodes, Inc. AZ23C5V6
Q1 1 1 MOSFET, N-channel, 2N7002, 60 V, 250 mA, 3 Ω, Vishay-Siliconix 2N7002E
SOT23
Q2 1 1 MOSFET, P-channel, ZVP3306, –60 V, 0.09 A, 14 Ω, Zetex ZVP3306
SOT23
R1, R2, 3 3 Resistor, chip, 100 Ω, 1/16 W, 5%, 603 Std Std
R11
R13, R14, 3 3 Resistor, chip, 1 MΩ, 1/16 W, 5%, 603 Std Std
R16
R12 1 1 Resistor, chip, 100 kΩ, 1/16 W, 5%, 603 Std Std
R3, R6, 3 3 Resistor, chip, 1 kΩ, 1/16 W, 5%, 402 Std Std
R7
R4, R5, 4 4 Resistor, chip, 100 Ω, 1/16 W, 5%, 402 Std Std
R9, R10
R17, R18 0 2 Resistor, chip, 15 kΩ, 1/16 W, 5%, 603 Std Std
R15 1 1 Resisitor, chip, 10kΩ, 1/16 W, 5%, 402 Std Std
R8 1 1 Resistor, chip, 0.02 Ω, 0.25 W, 1%, 1206 Vishay WSL1206
U1 1 0 Single cell Li-Ion/Polymer gas gauge device, QFN Texas bq27010DRK
Instruments
U1 0 1 Single cell Li-Ion/Polymer gas gauge device, QFN Texas bq27210DRK
Instruments
J1, J3 2 2 Terminal blocks, 3 position OST ED1515
J2 1 1 Terminal blocks, 2 position OST ED1514
J4 0 1 Header, 2-pin, 100mil spacing, (36-pin strip) Sullins PTC36SAAN
N/A 1 1 PCB Any HPA212
6 bq27x10EVM Circuit Module Performance Specification Summary
Table 4 gives the performance specifications of the bq27x10EVM circuit module.
Table 4. Performance Specification Summary
SPECIFICATION MIN TYP MAX UNIT
Input Voltage PACK+/BAT– 2.6 4.5 V
Charge and Discharge Current(1) 2.5 A
(1) Charge and discharge maximum is limited by the PCB design and power dissipation of the 20-mΩ1/4-W sense resistor included
in the kit.
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+
PACK+ BAT-
PACK-
System Load/
Charger
Single Cell Li-Ion
-
EVM Hardware and Software Setup www.ti.com
7 EVM Hardware and Software Setup
This section describes how to install the bq27x10EVM PC software and how to connect the different
components of the EVM.
7.1 Software Installation
The following steps install the bq27x10EVM evaluation software:
1. Insert CD ROM into a CD ROM drive.
2. Select the CD ROM drive using My Computer or File Manager.
3. Select the ReadMeFirst.txt file.
4. Follow the instructions to install USB drivers for EV2300.
5. After installing the USB drivers for EV2300, double-click on the Setup.exe icon.
6. The setup program installs a Windows application group
7.2 Hardware Connection
The three hardware components to the bq27x10EVM are:
• The bq27x10EVM circuit module
• The PC interface board (EV2300 – available separately)
• The PC.
7.2.1 Connecting the bq27x10EVM Circuit Module to a Battery Pack
Figure 8 shows how to connect the bq27x10EVM circuit module to a Li-ion cell and the system
load/charger.
Figure 8. bq27x10EVM Circuit Module Connection to Cells and System Load/Charger
7.2.2 PC Interface Connection
The following steps configure the hardware for interface to the PC:
1. Connect colored wires that are included with EV2300 to bq27x10EVM using Table 5 as a guide.
2. For bq27010 connect the connector with colored wires to the HDQ connector that is on the EV2300.
HDQ connection is located on the top right of EV2300. For the bq27210, connect the connector with
colored wires to the I2C connector that is on the EV2300. The I2C connection is just below the HDQ
connection on the EV2300.
3. Connect the PC USB cable to the EV2300 and the PC USB port.
The bq27x10EVM is now set up for operation.
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