MP26101

2A, 24V Input, 1.1MHz, 1- or 2- Cell

4.1V/Cell Switching Li-Ion Battery Charger

MP26101 Rev. 1.0

www.MonolithicPower.com

1

9/7/2011

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© 2011 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP26101 is a monolithic switching charger

for 1- or 2-cell Li-Ion battery packs. It has a

built-in internal power MOSFET, and can output

up to 2A of charge current with current mode

control for fast loop response and easy

compensation. The charge current can be

programmed

through

an

accurate

sense

resistor.

MP26101 regulates the charge current and

charge voltage using two control loops to

realize high-accuracy for both constant-current

charge and constant-voltage charge.

Fault condition protection includes cycle-by-cycle

current limiting and thermal shutdown. Other

safety features include battery temperature

monitoring, a charge status indicator, and a

programmable timer to halt the charging cycle.

The MP26101 requires a minimal number of

readily-available external components.

The MP26101 is available in 4mm×4mm 16-pin

QFN package.

FEATURES

 Charges 1- or 2-cell Li-Ion battery packs

 4.1V/Cell Charge Full Voltage

 3.9V/Cell Auto-recharge Threshold

 Wide 5V to 24V Operating Input Range

 Up to 2A Programmable Charging Current

 0.2Ω Internal Power MOSFET

 Up to 90% Efficiency

 Fixed 1.1MHz Frequency

 Preconditioning for Fully-Depleted Batteries

 Charging Status Indicator

 Input Supply and Battery Fault Indicator

 Thermal Shutdown

 Cycle-by-Cycle Over-Current Protection

 Battery Temperature Monitor and Protection

APPLICATIONS

 Distributed Power Systems

 Chargers for 1-Cell or 2-Cell Li-Ion Batteries

 Smartphones

 Portable DVD Player

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Monolithic Power Systems, Inc.

TYPICAL APPLICATION