DS2745EVKIT+ Analog Devices

19-4844 Rev 11/09 DS2745EVKIT 2 Low-Cost I C Battery Monitor Evaluation Kit www.maxim-ic.com FEATURES INDEX Demonstrates the capabilities of the DS2745 Evaluation Kit Contents 2 Low-Cost I C Battery Monitor, including: Equipment Needed Introduction Temperature measurement Setup and Installation Voltage measurement Board Connections Current measurement Software Installation Current accumulation Selecting the COM Port Interfaces to the USB of a PC running Program Menus Windows XP or older operating system Register Windows Program Tabs EVALUATION KIT CONTENTS Real Time Meters 1 pc. Evaluation Board Data Logging 1 pc. DS9123O USB Adapter User Memory 1 pc. RJ-11 Phone Cable EQUIPMENT NEEDED ORDERING INFORMATION 1. A PC running Windows XP or older PART TYPE operating system and an available USB port. DS2745EVKIT+ EV Kit 2. Cables with mini-grabber style clips or the +Denotes lead(Pb)-free and RoHS compliant. ability to solder directly to connection pads. 3. A Lithium-Ion battery and a power supply Windows XP is a registered trademark of Microsoft Corp. and/or load circuit INTRODUCTION The DS2745 evaluation kit (EV kit) makes performance evaluation, software development, and 2 prototyping with the DS2745 Low-Cost I C Battery Monitor easy. The evaluation board interfaces to a PC through a DS9123O USB Adapter and RJ-11 cable connection. The DS2745 EV kit evaluation software gives the user complete control of all functions of the DS2745. Separate control tabs allow the user access to all RAM memory locations, all control registers, and real- time updates of all monitored parameters. The software also incorporates a data logging feature to monitor a cell over time. The evaluation board circuit is designed to provide the DS2745 with accurate parameter measurements and protect the DS2745 from ESD damage. 1 of 11 DS2745EVKIT EVALUATION BOARD DS2745EVKIT EVALUATION BOARD DS2745EVKIT SETUP AND INSTALLATION BOARD CONNECTIONS Connections to the TSSOP demonstration board are best made either by soldering directly to the pads or by using cables with mini-grabber clips. Communication to the TSSOP board can be accomplished either through the RJ-11 jack by connecting the provided standard six conductor RJ-11 cord or by wiring directly to the SDA. SCL and P- pads. In the latter case, the size of the board can be reduced by snapping off the RJ-11 jack along the break line, see Figure 1. To utilize the demonstration software, the SDA, SCL and P- lines must be connected to the DS9123O communication brick using either of the two methods described. DS2745 EV KIT BOARD Break Line SCL RJ-11 B+ SDA Figure 1: DS2745 EV Kit Board PD020705 Figures 2a and 2b show the recommended circuits to simulate charging and discharging. The Lithium-Ion cell is connected between the B+ and B- pads. The battery charger/power supply or circuit load is connected between the B+ and P- pads. The evaluation software can be run in either configuration as long as a cell is connected between the B+ and B- terminals providing a minimum of 2.5 volts to power the DS2745. Leaving the PIO pin unconnected does not interfere with the operation of the demonstration board. Refer to the datasheet for the operation of this pin. SDA SDA SCL SCL Power Supply / Battery + B+ B+ + Charger LOAD BATTERY PIO BATTERY PIO B- - B- - P - P - Figure 2a: Charging Circuit Fig 2b: Discharging Circuit 2 of 11 PIO P- B-