Monolithic Power Systems MP26123

Description

The MP26123 is a monolithic DC-DC stepdown 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 controlfor 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.

Features

• Charges 2- or 3-Cell Li-Ion Battery Packs
• Wide Operating Input Range
• Programmable Charging Current of up to 2A
• ±0.75% VBATT Accuracy
• 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

Typical applications

• Mobile Internet Device
• Charger for 2- or 3-Cell Li-Ion Batteries
• Portable Media Player
• Distributed Power Systems
• Netbook

More information

• Datasheet
• IC product information