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TI's new power-distribution switches provide highly accurate current limits to ensure safety and guard against short-circuits

Posted on: Monday, 5 January 2009, 08:00 CST

DALLAS, Jan. 5 /PRNewswire/ -- Four new power-distribution switches from Texas Instruments Incorporated (TI) (NYSE: TXN) enable end equipment to handle heavy capacitive loads while preventing short-circuits in a variety of applications, such as USB ports/hubs, cell phones, laptops, flat panel TVs and set-top boxes. The new chips offer a programmable current-limit threshold from 75 mA to 1.3 A via an external resister with up to 6 percent accuracy. The constant current TPS2552/53 and latch-off TPS2552-1/53-1 provide at least a 50 percent improvement in current limit accuracy compared to competing solutions. The TPS2552/3 devices limit the output current to a safe level by switching into a constant-current mode when the output load exceeds the current-limit threshold while the TPS2552-1/3-1 turns the switch off completely during over-current events. The enhanced accuracy of the TPS2552/53 also enables the device to be used as a simple circuit-breaking or current-limiting solution for a wide range of applications outside of consumer end equipment, including optical modules and low current management rails in telecommunications systems. See: www.ti.com/tps2552-pr.

Key Features Key Benefits -- +/-6 percent current-limit -- No need to over-design accuracy at 1.3 A power supply for inaccurate -- Meets USB current-limiting switch requirements -- Eases USB power -- Adjustable current limit implementation from 75 mA to 1,300 mA -- Single device used across -- Constant current (TPS2552/3) platforms, with just a and latch-off (TPS2552-1/3-1) resistor change versions -- Fault behavior can be -- Compatible with TPS2550/1 optimized for different -- Wide, 2.5-V to 6.5-V input designs range -- Easy upgrade path from -- Fast 2-uS over-current existing TPS2550/1 products response -- Same product allows -- -40 degree C to 85 degree C protection for 2.5-V, operating temperature range 3.3-V and 5-V rails -- Switch response fast enough to protect power supply -- Temperature range meets most commercial and industrial requirements -- Small package options save board space

Availability and pricing

The TPS2552/53 is available now in SOT23-6 and 2mm x 2mm SON-6 packaging and is priced at $0.75 in quantities of 1,000.

Find out more about TI's USB power switch portfolio by visiting the links below:

• Evaluation modules and samples www.ti.com/tps2552-pr
• Current-limit threshold calculator tool www.ti.com/tps2552calculator
• www.ti.com/usbpowerswitches for:
  • New products
  • Application notes
  • Parametric search
• TI's complete power management portfolio: www.power.ti.com

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-09002

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.

SOURCE Texas Instruments Incorporated

Source: PR Newswire

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