General Description

The MAX1535A is a highly integrated, multichemistry battery charger that simplifies construction of advanced smart chargers with a minimum number of external components. It uses Intel’s system management bus (SMBus) to control the charge voltage, charge current, and the maximum current drawn from the AC adapter. High efficiency is achieved through use of a constant off time step-down topology with synchronous rectification.

Features

♦ Compliant with Level 2 Smart Battery Charger Specifications Rev 1.1

♦ Intel SMBus 2-Wire Serial Interface

♦ ±0.5 Charge-Voltage Accuracy

♦ 11-Bit Charge-Voltage Resolution

♦ ±3 Input Current-Limit Accuracy

♦ Uses Small (10mΩ) Current-Sense Resistors

♦ 8A Maximum Charge Current

♦ 6-Bit Input and Charge-Current Resolution

♦ 8V to 28V Input Voltage Range

♦ 175s Charge Safety Timer

♦ Automatic Selection of System Power Source

♦ Charges any Battery Chemistry (Li+, NiCd, NiMH, Lead Acid, etc.)