DS2780K Maxim Integrated, DS2780K Datasheet - Page 2

• Manufacturer Part Number: DS2780K
• Description: Power Management IC Development Tools
• Manufacturer: Maxim Integrated
• Series: DS2780r

The evaluation board circuit is designed to provide the DS2780 with accurate parameter measurements.
Kit demonstration boards will vary as they are improved upon over time.
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 DQ 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 DQ and PAC-
lines must be connected to the DS9123O communication brick using either of the two methods described.
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
DS2780. 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.
Figure 2a: Charging Circuit
PIO
DQ
P -
B+
B-
BATTERY
+
-
RJ-11
Figure 1: Communication Connections
Power
Supply /
Battery
Charger
2 of 13
Break Line
PIO
B+
DQ
Fig 2b: Discharging Circuit
PIO
DQ
P -
B+
B-
BATTERY
+
-
LOAD