SINGLE-CHIP, BATTERY-PACK CONTROLLER IS THE SMALLEST OVERALL SOLUTION AND PROVIDES THE HIGHEST ACCURACY
SUNNYVALE, CA-November 5, 2003-Maxim Integrated Products
(NASDAQ: MXIM) introduces the MAX1781 advanced battery-pack controller. This IC is a programmable, smart battery-pack supervisor that integrates a microcontroller core, program memory (EEPROM), a Coulomb- counter based fuel gauge, a multichannel data-acquisition unit, and a master/slave SMBusþ interface. The 8-bit, RISC microcontroller core is user-programmable and provides battery-pack designers with complete flexibility for developing fuel gauging and control algorithms.
The data-acquisition unit can measure individual cell voltages to within 25mV, total battery-stack voltage (up to 20.48V), and internal/external chip temperature. Combined with user-adjustable overcurrent comparators, these features allow the MAX1781 to eliminate a separate primary-pack protection IC. This controller is a high-voltage IC that can directly connect to 2- to 4-series lithium-ion (Li+) cells and supply itself through a fully integrated 3.4V low-dropout linear regulator. By achieving a high level of integration and eliminating a separate primary-protection IC and linear regulator, the MAX1781 provides the smallest and most advanced, programmable battery-pack solution.
An advanced-software development toolset, which includes an optimized C-compiler, an in-circuit emulator (ICE), and an SMBus monitor accessible from an integrated-development environment, allows the user to easily implement and debug advanced battery-pack fuel gauging and control software.
The MAX1781 is available in space-saving (7mm x 7mm) 48-pin TQFN package, and is specified for the extended-industrial temperature range (-40°C to +85°C). Prices start at $9.40 (1000-up, FOB USA).
SMBus is a trademark of Intel Corporation.
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