MPS MP26123 Manual

The Future of Analog IC Technology
DESCRIPTION
The MP26123 is a monolithic DC-DC step-
down switching charger for 2- or 3-cell Li-ion
battery packs. It has an integrated high-side
power MOSFET can output up to a 2A charge
current. It also has peak-current–mode control
for fast loop response and easy compensation.
The MP26123 uses a sense resistor to control a
programmable charge current, and accurately
regulates the charge current and charge
voltage using two control loops.
The MP26123 has multiple fault condition
protections that include cycle-by-cycle current
limiting and thermal shutdown. Other safety
features include battery temperature monitoring
and protection, charge status indication and
programmable timer to cease the charging
cycle when timer out.
The MP26123 requires a minimal number of
readily-available external components.
The MP26123 is available in a 4mm x 4mm 16-
pin QFN package.
TYPICAL APPLICATION
MP26123 Rev. 1.01
10/28/2011 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
2/3-Cell Switching Li-ion Battery Charger
FEATURES

Charges 2- or 3-Cell Li-Ion Battery Packs

Wide Operating Input Range

Programmable Charging Current of up to 2A

±0.75% V

0.2Ω Integrated Power MOSFET

Up to 90% Efficiency

Fixed 600kHz Frequency

Preconditioning for Fully Depleted Batteries

Charging Status Indicator

Input Supply Fault Indicator

Thermal Shutdown

Cycle-by-Cycle Over-Current Protection

Battery Temperature Monitor and Protection
APPLICATIONS

Mobile Internet Device

Portable Media Player

Netbook

Charger for 2- or 3-Cell Li-Ion Batteries

Distributed Power Systems
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www.MonolithicPower.com
© 2011 MPS. All Rights Reserved.
MP26123
2A,24V Input, 600kHz
Accuracy
BATT
1