General Description

The MAX1647/MAX1648 provide the power control necessary to charge batteries of any chemistry. In the MAX1647, all charging functions are controlled via the Intel System Management Bus (SMBus™) interface. The SMBus 2-wire serial interface sets the charge voltage and current, and provides thermal status information. The MAX1647 functions as a level 2 charger, compliant with the Duracell/Intel Smart Battery Charger Specification. The MAX1648 omits the SMBus serial interface, and instead sets the charge voltage and current proportional to the voltage applied to external control pins.

Features

♦ Charges Any Battery Chemistry:

Li-Ion, NiCd, NiMH, Lead Acid, etc.

♦ Intel SMBus 2-Wire Serial Interface (MAX1647)

♦ Intel/Duracell Level 2 Smart Battery Compliant (MAX1647)

♦ 4A, 2A, or 1A Maximum Battery-Charge Current

♦ 11-Bit Control of Charge Current

♦ Up to 18V Battery Voltage

♦ 10-Bit Control of Voltage

♦ ±0.75 Voltage Accuracy with External ±0.1 Reference

♦ Up to 28V Input Voltage

♦ Battery Thermistor Fail-Safe Protection

Applications

Notebook Computers

Personal Digital Assistants

Charger Base Stations

Phones