DS2756EVKIT+ Analog Devices

19-4847 Rev 9/09 DS2756EVKIT+ High Accuracy Battery Fuel Gauge With Programmable Suspend Mode Evaluation Kit www.maxim-ic.com FEATURES Demonstrates the capabilities of the DS2756 High Accuracy Battery Fuel Gauge, including: Programmable Suspend Mode Temperature measurement Voltage measurement Current measurement Current and Voltage Snapshot Mode Current accumulation Temperature and Accumulated Current Alarms Information storage Identification Interfaces to the USB port of a PC running Windows XP or older EVALUATION KIT CONTENTS INDEX 1 pc. TSSOP Evaluation Board Evaluation Kit Contents 1 pc. DS9123O USB Adapter Equipment Needed 1 pc. RJ-11 Phone Cable Introduction Setup and Installation EQUIPMENT NEEDED Board Connections 1. A PC running Windows XP or older operating Software Installation system and an available USB port. Selecting the COM Port 2. Cables with mini-grabber style clips or the Program Menus ability to solder directly to connection pads. Register Windows 3. A Lithium-Ion battery and a power supply Program Tabs and/or load circuit. Real Time Meters Data Logging Windows XP is a registered trademark of Microsoft Corp. User Memory Pack Information Fuel Gauging INTRODUCTION The DS2756 evaluation kit (EV kit) makes performance evaluation, software development, and prototyping with the DS2756 High Accuracy Battery Fuel Gauge easy. The evaluation board interfaces to a PC through a DS9123O USB Adapter and RJ-11 cable connection. The DS2756 EV kit evaluation software gives the user complete control of all functions of the DS2756. Separate control tabs allow the user access to all EEPROM and RAM memory locations, all control Page 1 of 15 DS2756EVKIT+ registers, and real-time updates of all monitored parameters. The software also incorporates a data logging feature to monitor a cell over time and fuel gauging algorithms to improve remaining capacity calculations based on specific cell characteristics. The evaluation board circuit is designed to provide the DS2756 with accurate parameter measurements and protect the DS2756 from ESD damage. Kit demonstration boards will vary as they are improved upon over time. For information on the demonstration board circuits refer to our website at www.maxim- ic.com. SETUP AND INSTALLATION BOARD CONNECTIONS Connections to the demonstration board are best made either by soldering directly to the pads or by using cables with mini-grabber clips. Communication to the board can be accomplished by connecting the RJ- 11 Jack to the DS9123O USB Adapter with the provided 6 conductor cable. Then the DQ and PAC- terminals on the RJ-11 Jack can be wired directly to the DQ and PAC- pads on the demonstration board. Figure 1 shows the recommended circuit for the DS2756EVKIT+ demonstration board. The Lithium-Ion cell or NiMH cell stack is connected between the BAT+ and BAT- pads. If a Lithium-Ion cell is used, a protection circuit must be included between the battery and the demo board. The user system load circuit/charger is connected from BAT+ to PAC-. The evaluation software can be run with or without a load or charger as long as a cell is connected between the BAT+ and BAT- terminals providing a minimum of 2.7 volts to power the DS2756. DS2756EVKIT+ EVALUATION BOARD Figure 1: PD010203 Cell, Load, and Charger Connections SOFTWARE INSTALLATION To install the DS2756 EV kit software, exit all programs currently running and download the latest version at www.maxim-ic.com. Unzip the compressed file and double click SETUP.EXE to begin the installation process. Follow the prompts to complete the installation. The DS2756 EV kit software can be uninstalled in the Add/Remove Programs tool in the Control Panel. After the installation is complete, open the DS2756K folder and run DS2756K.EXE or select DS2756K from the program menu. A splash screen containing information about the evaluation kit appears as the program is being loaded. SELECTING THE COM PORT The first time the software runs, the Select Preferences window appears. In this window, select either serial port or USB communication and the port number then hit OK. The DS2756 EV kit software saves this port selection and automatically uses the selection each time the program starts. To change the port 2 of 15