Product category:
Power Supply ICs and Controllers
News Release from: Texas Instruments (April 2001-March 2006) | Subject: bq2063
Edited by the Electronicstalk Editorial
Team on 02 August 2001
Chip simplifies battery capacity
monitoring
A Smart Battery System (SBS) compliant gas gauge IC from Texas Instruments for Li-ion or Li-polymer battery packs simplifies the design of battery capacity monitoring and safety control circuits.
A Smart Battery System (SBS) compliant gas gauge IC from Texas Instruments for Li-ion or Li-polymer battery packs simplifies the design of battery capacity monitoring and safety control circuits Designed for battery pack integration, the device monitors and reports critical battery parameters, controls the battery's charging profile, and provides battery alarm warnings and safety control signals
This article was originally published on Electronicstalk on 8 Nov 2004 at 8.00am (UK)
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The device supports version 1.1 of the SBS Smart Battery Data (SBD) set and reports data, such as remaining capacity in milliampere-hours or milliwatt-hours, instantaneous charge or discharge current, temperature and voltage.
The portable system uses the data to effectively manage battery power and extend system operating time as much as possible.
The new device is ideal for use in notebook computers, handheld terminals, medical and test equipment, and other portable equipment powered by three or four series Li-ion or Li-polymer battery packs.
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The bq2063 directly interfaces with the Seiko S-8243 battery protection IC to simplify the design of safety and SBS compliant electronics in a Li-ion or Li-polymer battery pack.
In addition to safety protection, the S-8243 provides voltage regulation and individual cell voltage inputs to the bq2063, reducing the number of external components required for circuit operation by as much as 40% compared with previous generations or competitive solutions.
Using the bq2063, a complete circuit, including Li-ion safety protection and SBS compliant battery fuel gauging, can fit on less than 1in2 of PCB space.
While a bq2063 solution provides a unique degree of integration, it also offers a high level of performance to meet the requirements for accurate battery fuel gauging with the advanced battery chemistries used in today's low power portable systems.
To accurately gauge remaining battery capacity and predict remaining system run times, the bq2063 employs a highly accurate voltage-to-frequency convertor (VFC) for continuous charge and discharge integration.
The VFC has a measurement offset error of less than 16uV, ensuring accurate charge and discharge counting of operating and ultra-low standby currents using a small value sense resistor (<20mohm).
Additionally, for enhanced accuracy, the bq2063 features programmable cell modelling, which adjusts the gauge's capacity calculations for cell-specific characteristics, such as self-discharge rates and charge and discharge efficiencies based on rate and temperature variations.
The bq2063 typically consumes less than 180uA in operating mode and less than 5uA in sleep mode.
To communicate battery data to the host system, the bq2063 supports version 1.1 of the two-wire SBS System Management Bus (SMBus) and the one-wire 16bit TI HDQ communication protocol.
Samples of the bq2063 will be available from TI and its authorised distributors in August with full production scheduled for September 2001.
The bq2063 is packaged in a 28-pin SSOP.
The suggested resale price is $3.85 in quantities of 1000.
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