Battery Fuel Gauge is intended for handheld electronics.
Press Release Summary:
Single-cell battery fuel gauge IC, bq27505, leverages Impedance Track(TM) technology, which predicts battery capacity under all operating conditions. Residing in system, stand-alone lithium battery capacity monitoring device measures 2.5 x 2 x 0.625 mm and reports remaining capacity, time-to-empty, voltage, current, and temperature. Residing within battery pack or on system's main board in embedded, non-removable battery, bq27541 can also provides secure battery pack authentication.
Original Press Release:
TI Introduces Smallest Impedance Track(TM) Battery Fuel Gauge for Handheld Electronics
Extends family of high-accuracy battery fuel gauges with system- and pack-side devices
DALLAS, March 9 -- Texas Instruments Incorporated (TI) (NYSE: TXN) today introduced a single-cell battery fuel gauge integrated circuit (IC) with Impedance Track(TM) technology, which is half the size of its predecessor. The tiny bq27505 stand-alone lithium battery capacity monitoring and reporting device resides in the system and measures only 2.5 mm x 2 mm x 0.625 mm, and supports portable applications, such as smart phones, digital cameras and MP3 players, where maintaining long battery life is critical for end users. For details see: www.ti.com/bq275xx-pr.
TI also introduced the bq27541, which resides within a battery pack or on the system's main board in an embedded, non-removable battery. The device also provides secure battery pack authentication, using the SHA-1/HMAC authentication algorithm.
Impedance Track technology accurately predicts battery capacity instantly under all operating conditions, including battery age, temperature and discharge behavior. Today, TI ships millions of battery fuel gauge ICs with Impedance Track technology to customers worldwide in applications ranging from notebooks to smart phones.
Key features of the bq27505
-- Patented Impedance Track next-generation gauging algorithm
-- Accurate and complete battery fuel gauge
-- CPU-based IC reports remaining capacity, time-to-empty, voltage, current, temperature and more
-- Calculates remaining charge under all conditions
-- System-side implementation even with a removable battery
-- 12-pin, 2.5 x 2 x 0.625 mm WCSP package
Key benefits
-- Provides complete "state-of-health" battery information so a system can effectively manage the battery and extend run-time
-- No calculations needed with the host microcontroller for easy implementation
-- Accurate display of run time under all conditions
-- No extra circuitry needed inside the battery pack
-- Smallest Impedance Track solution in the industry
Availability and pricing
TI's single-cell battery fuel gauges are available today in volume production from TI and its global network of authorized distributors. The table below includes pricing and packaging information.
Device Description Package (mm) 1K-unit price
bq27505 (1) System-side design, 12-ball chip scale,
requires external 2.5 x 2 x 0.635 $1.45
2.5-V LDO
bq27541 (2) Pack-side, 12-pin SON, 2.5 x 4 $1.85
internal LDO
bq27510 (3) System-side, 12-pin SON, 2.5 x 4 $1.85
internal LDO
bq27501 (4) System-side, resistor 12-pin SON, 2.5 x 4 $1.35
ID for multiple
chemistries
bq27500-V120 (5) System-side, 12-pin SON, 2.5 x 4 $1.35
external LDO
(1) bq27505
(2) bq27541
(3) bq27510
(4) bq27501
(5) bq27500-V120
Find out more about TI's single-cell battery fuel gauge ICs at the links below:
-- Order evaluation modules and samples: www.ti.com/bq275xx-pr.
-- Application note: Single-Cell Gas Gauge Application Book
-- Talk with TI engineers about bq275xx at the TI Battery Forum: www.ti.com/batteryforum
-- Power Management Selection Guide: www.ti.com/powerguide
About Texas Instruments
Texas Instruments (NYSE:TXN) helps customers solve problems and develop new electronics that make the world smarter, healthier, safer, greener and more fun. A global semiconductor company, TI innovates through design, sales and manufacturing operations in more than 30 countries. For more information, go to www.ti.com.
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