General Description

The MAX8731 is an SMBus™ programmable multichemistry battery charger. The MAX8731 uses a minimal command set to easily program the charge voltage, charge current, and adapter current limit. The MAX8731 charges one to four Li+ series cells and delivers up to 8A charge current. The MAX8731 drives n-channel MOSFETs for improved efficiency and reduced cost. Low-offset current-sense amplifiers provide high accuracy with 10mΩ sense resistors.

Features

♦0.5% Battery Voltage Accuracy

♦3% Input Current-Limit Accuracy

♦3% Charge-Current Accuracy

♦SMBus 2-Wire Serial Interface

♦Cycle-by-Cycle Current Limit

   Battery Short-Circuit Protection

   Fast Response for Pulse Charging

  Fast System-Load-Transient Response

♦Dual-Remote-Sense Inputs

♦Monitor Outputs for Adapter Current (4% Accuracy) AC Adapter Detection

♦11-Bit Battery Voltage Setting

♦6-Bit Charge-Current/Input-Current Setting

♦8A (max) Battery Charger Current

♦11A (max) Input Current

♦+8V to +26V Input Voltage Range

♦Charges Li+, NiMH, and NiCd Battery Chemistries MAX8731