MAX1873SEEE

The MAX1873SEEE from Analog Devices (formerly Maxim Integrated) is a low-cost, simple-to-implement switch-mode charger controller. It is designed to efficiently charge 2-, 3-, or 4-series lithium-ion battery packs at currents up to 4A or more. The device provides regulated charging current and voltage with high accuracy, ensuring battery health and optimal performance.

Key features include an AC adapter input-current-limit loop, which helps minimize the size and cost of the power supply. The MAX1873SEEE also supports charging NiCd or NiMH batteries, making it suitable for multi-chemistry charger designs. An analog output proportional to the charging current allows for monitoring by an ADC or microcontroller.

This charger controller operates with an input voltage up to 28V and features a low dropout voltage of 200mV for 100% duty cycle operation. It is available in a space-saving 16-pin QSOP package, ideal for compact designs. The integrated 300kHz PWM oscillator helps reduce noise in the system.

Applications for the MAX1873SEEE include notebook computers, portable internet tablets, hand-held instruments, PDAs, and desktop cradle chargers. An evaluation kit is also available to expedite the design process.