Power Distribution Switches guard against short circuits.
Press Release Summary:
Enabling end equipment to handle heavy capacitive loads, constant current TPS2552/53 and latch-off TPS2552-1/53-1 offer programmable current-limit threshold from 75 mA to 1.3 A via external resister with up to 6% accuracy. Products meet USB current-limiting requirements, operate from 2.5-6.5 V input, and feature 2 µsec over-current response. Same product, available in SOT23-6 and 2 x 2 mm SON-6 packaging, allows protection for 2.5, 3.3, and 5 V rails.
Original Press Release:
TI's New Power-Distribution Switches Provide Highly Accurate Current Limits to Ensure Safety and Guard Against Short-Circuits
DALLAS, Jan. 5 -- 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
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