Smart Battery Charger requires no firmware.

Press Release Summary:

Standalone LTC1760 has SMBus Interface and battery selector for charging 2 battery packs. It automatically controls charging, discharging, and battery selection; meets SMBus 1.1 specifications; and is backward compatible with version 1.0. IC provides precision charge voltage and current accuracy within 0.2% of value reported by battery. Housed in 48-lead, TSSOP package, unit includes 3 primary functions required to construct complete smart battery system management.

Original Press Release:

Standalone Dual Smart Battery Charger with SMBus Interface Requires No Firmware

MILPITAS, CA - July 14, 2003 - Linear Technology Corporation introduces the LTC1760, a standalone level 3 smart battery charger with a battery selector for charging two battery packs. As a standalone smart battery charger, the LTC1760 automatically controls charging, discharging and battery selection, eliminating the need for a host SMBus microcontroller and associated firmware.

The LTC1760 meets the new SMBus 1.1 specifications and is backward compatible with version 1.0. The IC guarantees precision charge voltage and current accuracy within 0.2% of the value reported by the battery for accurate gas gauging, improved charge time and safety as well as charging to maximum capacity. The IC's proprietary power path architecture extends typical battery run times by up to 10% and reduces charge times by 50%. The LTC1760 is housed in a compact 48-lead TSSOP and meets the required autonomous charging in applications such as battery backup in mass storage and RAID systems, portable diagnostics, security systems and industrial/military portable computers.

The LTC1760 includes three primary functions required to construct complete smart battery system management. The analog sections include a high efficiency DC/DC step-down synchronous controller and a power path function to support simultaneous charging or discharging of both batteries. Switching between power sources (wall adapter to battery or between batteries) occurs in less than 10us to prevent power interruption upon battery or wall adapter removal. The SMBus section of the LTC1760 is capable of interfacing with an SMBus host controller or two smart batteries, providing dual port operation and maintaining alarm monitoring for charging at all times. The LTC1760 charges 2- to 6-cell Li-Ion batteries, 6- to 18-cell NiMH/NiCd and 6V to 28V lead-acid batteries.

Pricing for the LTC1760 starts at $7.95 each in 1,000-piece quantities.

Summary of Features: LTC1760

Complete SMBus Battery Charger/Selector for Two Smart Batteries

Voltage and Current Accuracy within 0.2% of Value Reported by Battery

Simplifies Construction of Smart Battery System Manager

Includes All SMBus Charger V1.1 Safety Features

Includes Autonomous Operation without a Host

SMBus Switching for Dual Batteries

Fast Autonomous Power Path Switching

Company Background
Linear Technology Corporation was founded in 1981 as a manufacturer of high performance linear integrated circuits. Linear Technology products include operational, instrumentation and audio amplifiers; voltage regulators,power management devices, DC-DC converters and voltage references; comparators; monolithic filters; communications interface circuits; one-chip data acquisition sub-systems; pulse-width modulators and sample-and-hold devices; and high frequency devices. Applications for Linear Technology's high performance circuits include wireless and broadband telecommunications infrastructure, cellular telephones, networking products and satellite systems, notebook and desk top computers, computer peripherals, video/multimedia, industrial and medical instrumentation, automotive electronics, factory automation, process control, military and space systems, and high-end consumer products including digital cameras, MP3 players and other electronic products.

READER SERVICE: Call toll-free 1-800-4-LINEAR (for literature only), or go to the company's web site:

Note: LT, AND LTC are registered trademarks of Linear Technology Corp.

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