User manual

MCP73X23 Lithium Iron Phosphate Battery Charger Evaluation Board User’s Guide

1.2 WHAT IS THE MCP73X23 LITHIUM IRON PHOSPHATE BATTERY CHARGER

EVALUATION BOARD?

The MCP73X23 Lithium Iron Phosphate Battery Charger Evaluation Board demon-

strates the features of Microchip’s MCP73123 and MCP73223 “Lithium Iron Phos-

phate (LiFePO

) Battery Charge Management Controller with Input Overvoltage

Protection”.

The MCP73X23 Lithium Iron Phosphate Battery Charger Evaluation Board is designed

with two independent circuits. The MCP73123 is designed to charge a single-cell

LiFePO

battery, while the MCP73223 charges a dual-cell LiFePO

battery. Both

circuits offer two different fast charging currents. The default value of fast charging

current is 500 mA and when PROG via is tie to ground, the two parallel resistors output

1000 mA fast charging current to a battery pack. One blue LED status output allows

user to learn if the MCP73123/223 is in charging state or not.

The MCP73X23 Lithium Iron Phosphate Battery Charger Evaluation Board comes with

installed MCP73123 and MCP73223 devices in 3 mm x 3 mm DFN packages. The

factory preset battery regulation voltage is 3.6V for the MCP73123 and 7.2V for the

MCP73223 with 10% precondition current, 10% termination current set point, auto-

matic recharge and 6.5V over voltage protection threshold voltage.

The MCP73X23 Lithium Iron Phosphate Battery Charger Evaluation Board is designed

to observe the performance and features of Microchip’s MCP73123 and MCP73223.

Circuits can also be implemented into suitable applications without extra work.

1.3 WHAT THE MCP73X23 LITHIUM IRON PHOSPHATE BATTERY CHARGER

EVALUATION BOARD KIT INCLUDES

The MCP73X23 Lithium Iron Phosphate Battery Charger Evaluation Board kit includes:

• MCP73X23 Lithium Iron Phosphate Battery Charger Evaluation Board, 102-00262

• Important Information Sheet.

Note: Please refer to Table 2-2 for Charge Status Outputs and Table 2-1 for Fast

Charge Current vs. Resistor Lookup Table.