Product category: Power Supply ICs and Controllers
News Release from: Texas Instruments (April 2001-March 2006) | Subject: Bq26150
Edited by the Electronicstalk Editorial Team on 13 January 2005
Battery management IC
takes security onboard
A novel intelligent battery management IC easily identifies potentially unsafe batteries not approved by consumer electronics manufacturers for use in their devices
Texas Instruments has developed a novel intelligent battery management IC that easily identifies potentially unsafe batteries not approved by consumer electronics manufacturers for use in their devices. The bq26150 device authenticates battery packs used in cellphones, PDAs, digital still cameras, notebooks or other portable applications.
This article was originally published on Electronicstalk on 13 January 2005 at 8.00am (UK)
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TI's bq26150 resides in the battery pack and communicates with the host system's microcontroller or applications processor.
The host processor, such as TI's OMAP2420 applications processor, interrogates the battery pack on insertion with a request for data over a single-wire communications line.
The secure battery management IC calculates data obtained from a secret decryption key known only by the end-equipment system manufacturer.
The data are uniquely programmed in the bq26150 circuit using secure, nonvolatile memory.
If the battery information checks out, the system can allow normal system operation with the battery pack.
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A manufacturer can program the system to take action to protect the consumer if the battery pack response is not correct, or if the battery pack is not approved or determined to be defective.
For instance, a manufacturer may decide to render the system inoperable, or only allow discharging of the battery, but not charging.
The first battery management IC in a series of battery pack security products from TI, the bq26150 obtains important security data information based on a cycle redundancy check (or CRC) architecture, which combines the unique identification with a random challenge to produce a transmitted result.
The next battery security IC from TI will be based on an SHA-1/HMAC encryption architecture, originally developed by the US National Security Administration.
The new SHA-1-based circuit, expected to be in production in the first half of 2005, will provide an additional level of security.
Other security ICs planned for 2005 combine battery validation with other functions, such as battery fuel gauging and primary safety control.
Providing increased levels of integration, the new battery management devices are designed to meet demands of future portable systems with regard to end-user safety, design features and cost.
Leveraging its high-performance analogue system expertise and manufacturing capabilities, TI is the leading provider of battery management and power conversion semiconductor technology to portable design manufacturers and battery pack manufacturers.
A majority of today's notebook computers contain TI's battery management technology; and to date, TI has shipped tens of millions of advanced battery gauge ICs, charge management and protection circuits to wireless handset, PDA, portable medical and industrial design manufacturers.
The bq26150 chipset is sampling today from TI and its authorised distributors.
Volume production is scheduled for second quarter 2005.
Suggested resale pricing in 1000 piece quantities is $1.15 each.
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