MAX8731AETI+

The MAX8731AETI+ is an SMBus programmable multi-chemistry battery charger designed by Analog Devices. It supports charging one to four Li+ series cells and can deliver up to 8A of charge current. The device features high accuracy with 0.5% battery voltage accuracy and 3% charge current accuracy, utilizing dual remote sense inputs to measure feedback directly at the battery terminals.

This charger IC employs a minimal command set for easy programming of charge voltage, charge current, and adapter current limit. It includes features like cycle-by-cycle current-mode control for battery short-circuit protection and fast response to system load transients. The MAX8731AETI+ also provides digital output for AC adapter detection and an analog output for adapter current monitoring.

Designed for efficiency and reduced cost, the MAX8731AETI+ drives n-channel MOSFETs and uses low-offset current-sense amplifiers with 10mΩ sense resistors. It operates within an input voltage range of +8V to +26V and is available in a compact 5mm x 5mm, 28-pin Thin QFN package, suitable for surface mounting.

Key applications for the MAX8731AETI+ include notebook computers, tablet PCs, medical devices, and other portable equipment requiring rechargeable batteries.