USB Battery Charger IC delivers up to 1.1 A charge rate.April 28, 2009 -
Single-cell Li-Ion linear battery charger, bq25040, supports mobile phones and other handheld electronics. It regulates voltage within 1% accuracy from USB port or ac adapter, and integrated 50 mA LDO lets mobile application power up instantly from external power source - even with empty/absent battery. Single-input interface selects appropriate charge current and places device into production test mode, which regulates 4.2 V output without battery connection and supplies up to 2.3 A.
(Archive News Story - Products mentioned in this Archive News Story may or may not be available from the manufacturer.)
Original Press release
Texas Instruments, Inc. (TI)
12500 TI Blvd.
Dallas, TX, 75243-4136
USA
Tiny Texas Instruments Power Circuit Simplifies USB Battery Charger Design
1.1-A single-cell Li-Ion battery charger with integrated 50-mA regulator offers 2.3-A production test support, high-voltage protection
DALLAS, April 14 -- Texas Instruments Incorporated (TI) (NYSE:TXN) introduced today the industry's smallest 1.1-A Li-Ion linear battery charger with integrated 50-mA low-dropout regulator to support mobile phones and other handheld electronics. The new bq25040 comes in a small 2 mm x 3 mm package, and can regulate voltage within one-percent accuracy from a USB port or AC adapter. The device's integrated LDO allows a mobile application to power up instantly from an external power source, even with an empty or absent battery. For details and samples see: www.ti.com/bq25040-pr.
The bq25040 also saves manufacturing time and cost by eliminating the need for battery setup during production test phase. The charger's single-input interface selects the appropriate charge current and places the device into production test mode.
Key features and benefits
-- 30-V input with overvoltage protection enables safe charging with unregulated or aftermarket adapters
-- Up to 1.1-A charge rate
-- Integrated 50-mA LDO supplies power to external circuits, such as a USB transceiver
-- Production test mode regulates 4.2-V output without battery connection, and supplies up to 2.3 A
-- Selectable 100-mA or 500-mA USB current limit complies with USB standards
-- Input voltage dynamic power management provides protection against poor USB sources
Availability and pricing
The bq25040 is available now in a 10-pin, QFN package and is priced at $1.20 in quantities of 1,000. Other USB chargers include the bq24150 ultra-small switch-mode charger with integrated FETs, and the bq24072 with dynamic power path management. Samples and evaluation modules of the bq25040 are available today at http://power.ti.com/.
Find out more about TI's battery charge management portfolio:
-- Battery charger selection tool: www.ti.com/batterycharger-pr
-- Join the discussion about battery design at TI's Battery Forum: www.ti.com/batteryforum-pr
-- Follow TI on Twitter: www.twitter.com/txinstruments
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 manufacturing, design and sales operations in more than 25 countries. For more information, go to www.ti.com
Please refer all reader inquiries to:
Texas Instruments Incorporated
Semiconductor Group, SC-09048
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Fort Worth, TX 76155
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