MAX1909 Datasheet PDF - Maxim Integrated

General Description

●The MAX1909/MAX8725 highly integrated control ICs simplify construction of accurate and efficient multichemistry battery chargers. The MAX1909/MAX8725 use analog inputs to control charge current and voltage, and can be programmed by a host microcontroller (µC) or hardwired. High efficiency is achieved through use of buck topology with synchronous rectification.

●Features

●♦ ±0.5% Accurate Charge Voltage (0°C to +85°C)

●♦ ±3% Accurate Input Current Limiting

●♦ ±5% Accurate Charge Current

●♦ Programmable Charge Current >4A

●♦ Automatic System Power-Source Selection

●♦ Analog Inputs Control Charge Current and Charge Voltage

●♦ Monitor Outputs for Current Drawn from AC Input Source AC Adapter Presence

●♦ Up to 17.65V (max) Battery Voltage

●♦ Maximum 28V Input Voltage

●♦ Greater than 95% Efficiency

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

●Applications

●  Notebook and Subnotebook Computers

●  Hand-Held Data Terminals