DS2764K Maxim Integrated, DS2764K Datasheet - Page 2

• Manufacturer Part Number: DS2764K
• Description: Power Management IC Development Tools
• Manufacturer: Maxim Integrated
• Series: DS2764r

DS2764EVKIT+
INTRODUCTION
The DS2764 evaluation kit (EV kit) makes performance evaluation, software development, and
prototyping with the DS2764 Lithium-Ion Battery Monitor easy. The evaluation board interfaces to a PC
through a DS9123O USB Port Adapter and RJ-11 cable connection.
The DS2764 EV kit evaluation software gives the user complete control of all functions of the DS2764.
Separate control tabs allow the user access to all EEPROM and 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 and fuel gauging algorithms to improve remaining capacity
calculations based on specific cell characteristics.
The evaluation board circuit is designed to provide the DS2764 with accurate parameter measurements,
allow the DS2764 to disable charging or discharging, and protect the DS2764 from ESD damage. Kit
demonstration boards will vary as they are improved upon over time. For information on the
demonstration board circuits refer to the individual board datasheets located online at www.maxim-
ic.com.
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 PAC- 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 PAC- lines must be connected to the DS9123O communication brick using either of the
two methods described. The SDA and SCL weak pull up, VP, should not be connected when
communicating through the DS9123O. When using a different communication interface, connect VP to
B+ to activate 4.7K pull-ups on SDA and SCL.
Figure 1: Communication Connections
Break Line
PS
RJ-11
P+
B+
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 P+ 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
DS2764. Some board versions also have connections for the PS pin. Refer to the datasheet for the
operation of this pin. Leaving it unconnected does not interfere with the operation of the demonstration
board.
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