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 /PRNewswire/ -- 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
    Literature Response Center
    14950 FAA Blvd.
    Fort Worth, TX  76155
    1-800-477-8924

Trademarks

All registered trademarks and other trademarks belong to their respective owners.

Web site: http://www.ti.com/




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