Datasheet

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EVM Hardware and Software Setup

Table 3. Performance Specification Summary

Specification Min Typ Max Units

Input voltage Pack+ to Pack– 2.7 3.6 4.3 V

Charge and discharge current 0 1 2.5 A

5 EVM Hardware and Software Setup

This section describes how to install the bq27425EVM PC software and how to connect the different

components of the EVM.

5.1 System Requirements

The bq27425EVSW software requires Windows 2000 or Windows XP. Drivers for Windows 98SE are

provided, but Microsoft™ no longer supports Windows 98; therefore, Windows 98 can have issues with

USB driver support. The EV2300 USB drivers have been tested for Windows 98SE, but no assurance is

made for problem-free operation with specific system configurations.

5.2 Software Installation

Find the latest software version in the bq27425 tool folder on power.ti.com. Make a search by Part

Number for bq27425 to access the tool folder. Use the following steps to install the bq27425EVSW

software:

1. Ensure that the EV2300 or EV2400 is not connected to the personal computer (PC) through the USB

cable before starting this procedure.

2. Open the archive containing the installation package, and copy its contents into a temporary directory.

3. Open the software file that was downloaded from the TI Web site.

4. Follow the instructions on screen until completing the software installation.

5. Before starting the evaluation software, connect the EV2300 or EV2400 to the computer using the USB

cable.

6. If EV2300 is connected, wait until system prompt “new hardware found” appears. Choose “select

location manually”, and use the “browse” button to point to subdirectory TIUSBWin2K-XP-1.

7. Answer “continue” to the warning that drivers are not certified with Microsoft™.

8. If EV2300 is connected, after previous installation finishes, another system prompt "new hardware

found" appears. Repeat steps 1 through 5, but specify the directory as TIUSBWin2K-XP-2.

9. Answer "continue" to the warning that drivers are not certified with Microsoft. Driver installation is now

finished.

10. For EV2400, the driver should be installed along with software installation.

6 Troubleshooting Unexpected Dialog Boxes

The user that is downloading the files must be logged in as the administrator. The driver is not signed, so

the administrator must allow installation of unsigned drivers in the operating system policy.

7 Hardware Connection

The bq27425 evaluation system comprises three hardware components: the bq27425 circuit module, the

EV2300 or EV2400 PC interface board, and the PC.

7.1 Connecting the bq27425 Circuit Module to a Battery Pack

Figure 6 shows how to connect the bq27425 circuit module to the cells and system load/charger.

SLUU656A–October 2011–Revised January 2013 bq27425 EVM: Single-Cell Impedance Track Technology

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