Information

Portable Power Conversion Design Guide

Battery Management

Linear Battery Chargers

MCP73113, MCP73123: Battery Charge Management Controllers

In addition to the features of the MCP73830, these battery chargers also include charge status outputs, over-voltage

protection and more options for end-of-charge thresholds, safety timers and charge currents. Also available are the

MCP73213 (Li-ion) and MCP73223 (LiFePO4), with higher voltage capabilities to charge two cells in series.

■ Programmable charge current: 130 mA to 1.1A

■ Charge status output

■ Selectable 5%, 7.5%, 10% or 20% automatic end-of-charge

■ Elapse safety timer: 4 hour, 6 hour, 8 hour or disable

■ Over-voltage protection

■ Available in 10-pin 3 × 3 DFN packages

Typical Application Circuit for the MCP73123 (LiFePO4) and MCP73113 (Li-ion) Battery Chargers

Selected Products: Integrated FET Linear Battery Charger

Device Family Cells Vcc Range (V) Features

MCP73XXX 1/2 4–16 Li-Ion and LiFePO4, High Current, 0.5% Voltage Reg.

MCP73811/2 1 3.75–6 USB Selectable Charge Current, Thermal Reg.

MCP73831/2/3/4 1 3.75–6

Programmable Charge Current, Thermal Reg., UVLO, Preconditioning

and End-of-Charge

MCP73837/8 1 3.7–6 Dual Input (USB, DC, Adapter), Auto Input Switchover

MCP73871 1 3.9–6 Integrated System Load Sharing and Battery Charge Management

VDD

VBAT

VSS

Regulated

wall cube

CIN

COUT

STAT

PROG

RLED

LiFePO

Battery

PROG