Datasheet

Test Summary

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Load #1

A 30-V (or above), 5-A (or above) electronic load that can operate at constant current mode

Load #2

A HP 6060B 3-V to 60-V/0-A to 60-A, 300-W system dc electronic load or equivalent

Meters

Seven Fluke 75 multimeters, (equivalent or better)

Or four equivalent voltage meters and three equivalent current meters.

The current meters must be capable of measuring 5-A+ current.

Computer

A computer with at least one USB port and a USB cable. The EV2300 USB driver and the

bq24725A/735 SMB evaluation software must be properly installed.

EV2300 SMBus Communication Kit

An EV2300 SMBUS communication kit

Software

Install the EV2300 driver before installing the bq24725A/735 software.

Driver (USB EV2300) Installer XP2K – Last updated Jan28-04.zip or later: This is the EV2300 USB

driver. Save and unzip to c:\temp (or other local directory). Double-click on the setup.exe file. Perform the

following installation steps.

1. This software needs to be installed after the EV2300 USB driver.

• bq2473x EVSW setup.zip (SLUC258): This is the bq24725A/735 SMB evaluation software. Save

and unzip to c:\temp (or other local directory). Double-click on the setup.exe file. Perform the

following steps.

• Note that on first insertion of EV2300 into the USB port of personal computer (PC), the user needs

to follow the instructions of the Found New Hardware wizard.

• Allow the Windows™ operating system to connect to Windows Update to search for software.

Then click Next.

• Select Install software automatically (Recommended). Then click Next.

• If a window pops up informing that the TI USB Firmware Updater has not passed Windows Logo

testing, click Continue Anyway.

• If a target file already exists and is newer, do not overwrite the newer file.

• Click Finish.

2.3 Equipment Setup

1. Set the power supply #1 for 0 V ± 100 mVdc, with the current limit set to > 5 A, and then turn off

supply.

2. Connect the output of power supply #1 in series with a current meter (multimeter) to J1 (DCIN, GND).

3. Connect a voltage meter across J1 (DCIN, GND).

4. Set the power supply #2 for 3.3 V ± 100 mVdc, 0.2-A ± 0.1-A current limit, and then turn off supply.

5. Connect the output of the power supply #2 to J3 (3.3 V) and J4 (GND).

6. Connect a voltage meter across J2 (BAT, GND).

7. Connect a voltage meter across J2 (SYS, GND).

8. Connect J4 (SDA, SCL) and J4 (GND) to the EV2300 kit SMB port. See Table 1 for a connection

reference. Connect the USB port of the EV2300 kit to the USB port of the computer. The connections

are shown in Figure 1.

bq24735/725A Battery Charger Evaluation Module SLUU507A–June 2011–Revised September 2011

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