Maxim MAX8731AETI+

Multi-Chemistry8A-40°C ~ 85°C (TA)

Overview

The MAX8731AETI+ is an SMBus programmable multi-chemistry battery charger. The MAX8731AETI+ uses a minimal command set to easily program the charge voltage, charge current, and adapter current limit. The MAX8731AETI+ charges one to four Li+ series cells and delivers up to 8A charge current. The MAX8731AETI+ drives n-channel MOSFETs for improved efficiency and reduced cost. Low-offset current-sense amplifiers provide high accuracy with 10mΩ sense resistors. The MAX8731AETI+ current-sense amplifiers provide high accuracy (3% at 3.5A) and also provide fast cycle-by-cycle current-mode control to protect against battery short circuit and system load transients. The charger employs dual remote sense, which reduces charge time by measuring the feedback voltage directly at the battery, improving accuracy of initial transition into constant-voltage mode. The MAX8731AETI+ provides 0.5% battery voltage accuracy directly at the battery terminal. The MAX8731AETI+ provides a digital output that indicates the presence of the AC adapter, as well as an analog output that indicates the adapter current within 4% accuracy. The MAX8731AETI+ is available in a small 5mm x 5mm, 28-pin, thin (0.8mm) QFN package. An evaluation kit is available to reduce design time. The MAX8731AETI+ is available in a lead-free package.

Features

Applications

• Shop charger
• Golf carts
• Forklift
• Pallet jacks
• Personnel carriers
• Maintenance shops
• Rental fleets
• Truck dealers
• Floor scrubber
• Material handling