General Description

The MAX1772 is a highly-integrated, multichemistry battery-charger control IC that simplifies the construction of accurate and efficient chargers. The MAX1772 uses analog inputs to control charge current and voltage and can be programmed by the host or hardwired. High efficiency is achieved by a buck topology with synchronous rectification.

Features

♦ Input Current Limiting

♦ ±0.5 Output Voltage Accuracy Using Internal Reference (0°C to +85°C)

♦ Programmable Battery Charge Current >4A

♦ Analog Inputs Control Charge Current and Charge Voltage

♦ Monitor Outputs for: Current Drawn from AC Input Source Charging Current AC Adapter Present

♦ Up to 18.2V (max) Battery Voltage

♦ 8V to 28V Input Voltage

♦ > 95 Efficiency

♦ 99.99 (max) Duty Cycle for Low-Dropout Operation

♦ Charges Any Battery Chemistry: Li+, NiCd, NiMH, Lead Acid, etc.

Applications

Notebook and Subnotebook Computers

Personal Digital Assistants

Handheld Terminals