MCP73213 OVP DUAL-CELL LI-ION
BATTERY CHARGER EVALUATION
BOARD USER’S GUIDE
©
2009 Microchip Technology Inc.
DS51849A-page 7
Chapter 2. Installation and Operation
2.1
INTRODUCTION
The MCP73213 is a highly integrated Li-Ion battery charge management controller for
use in space-limited and cost-sensitive applications. The MCP73213 provides specific
charge algorithms for Li-Ion / Li-Polymer batteries to achieve optimal capacity and
safety in the shortest charging time possible. Along with its small physical size, the low
number of external components makes the MCP73213 ideally suitable for portable
applications.
The absolute maximum voltage, up to 18V, allows the use of MCP73213 in harsh
environments, such as low cost ac-dc adapter.
The MCP73213 employs a constant current / constant voltage charge algorithm. The
various charging voltage regulations provide design engineers flexibility to use in
different applications. The fast charge, constant current value is set with one external
resistor from 130 mA to 1100 mA. The MCP73213 limits the charge current based on
die temperature during high power or high ambient conditions. This thermal regulation
optimizes the charge cycle time while maintaining device reliability.
The PROG pin of the MCP73213 also serves as enable pin. When high impedance is
applied, the MCP73213 will be in standby mode
.
Typical applications for the reference design are Digital Camcorders, Portable Media
Players, Handheld Medical devices, Portable Communicators, Ultra Mobile Computers
and Netbook computers.
2.2
FEATURES
The MCP73213 OVP Dual-Cell Li-Ion Battery Charger Evaluation Board has the
following features:
• 13V Input Overvoltage Protection
• 10% Preconditioning of deeply depleted cells.
• 32-Minute Preconditioning Timer
• 6-Hour Safety Timer
• 10% Automatic Charge Termination
• 500 mA and 1000 mA Preset Fast Charge Current
• Automatic Recharge
• Thermal Regulation
• One Blue LED indicates charge status
• Small DFN packages with Exposed Pad as additional heat sink
