MP2618

2A, 24V Input, 600kHz

2-3 Cell Switching Li-Ion Battery Charger

With System Power Path Management

MP2618 Rev. 0.92

www.MonolithicPower.com

1

7/14/2010

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2010 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP2618 is a monolithic switching charger

for 2-3 cell Li-Ion battery packs with a built-in

internal power MOSFET. It achieves up to 2A

charge current with current mode control for

fast loop response and easy compensation.

The charge current can be programmed by

sensing the current through an accurate sense

resistor.

MP2618 regulates the charge voltage and

charge current using two control loops to realize

high accuracy CC charge and CV charge.

The system power path management function

ensures continuous supply to the system by

automatically selecting the input or the battery.

Power path management separates charging

current from system load. When the MP2618

realizes current sharing of the input current,

charge current will drop down according to the

increase of the system current.

Fault condition protection includes cycle-by-cycle

current limiting, and thermal shutdown. Other

safety features include battery temperature

monitoring,

charge

status

indication

and

programmable timer to cease the charging cycle.

The MP2618 is available in a 28-pin, 4mmx5mm

QFN package.

FEATURES

• Charges 2-3 cell Li-Ion battery packs

• Wide Operating Input Range

• Up to 2A Programmable Charging Current

• Power Path Management with Current

Sharing

• 0.28Ω Internal Power MOSFET Switch

• Up to 90% Efficiency

• Fixed 600kHz Frequency

• Preconditioning for fully depleted batteries

• Charging Operation Indicator

• Input Supply and battery fault indicator

• Thermal Shutdown

• Cycle-by-Cycle Over Current Protection

• Battery Temperature Monitor and Protection

APPLICATIONS

•

Netbook PC

•

Distributed Power Systems

•

Chargers for 2-Cell or 3-Cell Li-Ion

Batteries

•

Pre-Regulator for Linear Regulators

“MPS” and “The Future of Analog IC Technology” are Registered Trademarks

of Monolithic Power Systems, Inc.