User’s Guide User’s Guide 1
EVM IMPORTANT NOTICE Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation kit being sold by TI is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not considered by TI to be fit for commercial use.
DYNAMIC WARNINGS AND RESTRICTIONS It is important to operate this EVM within the input voltage range of 2.6 V to 4.5 V and the output range of 2.6 V to 4.5 V. Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are questions concerning the input range, please contact a TI field representative prior to connecting the input power.
SLUU151 – April 2003 bq26220EVM-001 Single Cell Battery Monitor Evaluation Module Portable Power Contents 1 bq26220EVM–001 Battery Monitor Evaluation Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 Circuit Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3 EVM Hardware and Software Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SLUU151 – April 2003 2 Circuit Module The circuit module in the bq26220EVM-001 is a complete and compact example solution for battery monitoring of a single-cell Li-on pack.The circuit module incorporates a bq26220 battery monitor IC and all other components necessary to accurately protect and monitor the charge and discharge of one Li-Ion cell. This EVM can also be used for 3-series NiMH applications.
SLUU151 – April 2003 2.3 Circuit Module Physical Layouts This section contains the board layout and assembly drawings for the bq26220EVM-001 circuit module (SLUP165) 2.3.1 Board Layout Figure 2 shows the PCB layers and assembly drawing for the circuit module. Figure 2. Top Assembly Figure 3.
SLUU151 – April 2003 Figure 4. Layer 1 Figure 5.
SLUU151 – April 2003 2.4 List of Materials Table 2. List of Materials Ref Des Description MFG PCB Qty-001 1 Printed-circuit board, 0.031, FR4, SMOBC, HASL Any MFG Part# Size Terminal 1 Terminal block 3.5 mm On Shore ED555/2DS 3.5 mm × 2 Terminal 1 Terminal block 3.5 mm On Shore ED555/2DS 3.5 mm × 3 C1, C2, C3 3 Capacitor, ceramic, 0.1 µF, 16 V, ±10%, X7R Panasonic ECJ-1VB1C104K 603 R6 1 Resistor, 0.
SLUU151 – April 2003 3 EVM Hardware and Software Setup This section describes how to install the EV2200-26220 PC software and how to connect the components of the EVM. 3.1 Software Installation The following steps install the EV2200-26220 software: 1. 2. 3. 4. 3.2 Insert disk 1 into a 3 1/2 inch floppy drive. Select the 3 1/2 inch drive using My Computer. Double-click on the Setup.exe icon. The setup program prompts for the remaining disks and installs a Windows application group.
SLUU151 – April 2003 3.2.2 PC Interface Connection The following steps configure the hardware for interface to the PC: 1. Connect bq26220EVM–001 to the EV2200 using wire leads as in the following table. Table 4. Circuit Module-to-EV2200 Connection bq26220 Based Battery EV2200 HDQ SMBD/HDQ1 PACK– VSS 2. Connect the PC serial cable to the EV2200 and the PC COM port. The bq26220EVM-001 is now set up for operation.
SLUU151 – April 2003 4 Operation This section details the operation of the bq26220EVM-001 software. 4.1 Starting the Program Run EV2200–26220 from the Start|Programs|Texas Instruments|bq26220 Battery Monitor menu sequence.The software defaults to PC Com port 1 for communication.If the EV2200 is connected to Com port 1, the program should load and display the initial data screen. Figure 7.
SLUU151 – April 2003 4.2 Initialization This section describes the settings required before the bq26220 is evaluated. 4.2.1 Setting Programmable bq26220 Options 4.2.1.1 Wake-Up Threshold Select the wake-up threshold with the woe pulldown tab at location 0x64.This designates the potential across the sense resistor, below which the bq26220 goes to sleep. 4.2.1.2 GPIO and STAT Boxes To configure the GPIO pin as input or output click on the GPIO box at 0x64 location.
SLUU151 – April 2003 4.3 Reading and Writing Flash Memory The flash memory on the bq26220 can store battery-pack specific parameters that can be used by the host system in its capacity monitoring algorithm.To read the flash memory, click on the Flash button to select the flash data screen. Click the Read Flash button to read all flash pages or click on the individual page number to read the pages individually.
SLUU151 – April 2003 4.4 RAM Addressing The RAM page of memory can be viewed by selecting the RAM data screen. Click on the Read RAM button to read the RAM locations. Each RAM location can be modified by clicking on the individual location and entering the new value in hex.The RAM values can be stored to disk as one data file.To do this, select File|Save RAM File and enter the file name in the Store Ram File window.
SLUU151 – April 2003 4.5 Data Logging The bq26220 registers can be logged by using the data log function.To log the data and create a log file 1. 2. 3. 4. 5. Select Options|Logging Options to select the registers to log and set the logging interval. File|Start Data Log from the pulldown menu.
IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.
