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

(PresseBox) ( Dallas, )
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

- +/-6 percent current-limit accuracy at 1.3 A
- Meets USB current-limiting requirements
- Adjustable current limit from 75 mA to 1,300 mA
- Constant current (TPS2552/3) and latch-off (TPS2552-1/3-1) versions
- Compatible with TPS2550/1
- Wide, 2.5-V to 6.5-V input range
- Fast 2-uS over-current response
- -40 degree C to 85 degree C operating temperature range

Key Benefits

- No need to over-design power supply for inaccurate switch
- Eases USB power implementation
- Single device used across platforms, with just a resistor change
- Fault behavior can be optimized for different designs
- Easy upgrade path from existing TPS2550/1 products
- Same product allows protection for 2.5-V, 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
Für die oben stehenden Pressemitteilungen, das angezeigte Event bzw. das Stellenangebot sowie für das angezeigte Bild- und Tonmaterial ist allein der jeweils angegebene Herausgeber (siehe Firmeninfo bei Klick auf Bild/Meldungstitel oder Firmeninfo rechte Spalte) verantwortlich. Dieser ist in der Regel auch Urheber der Pressetexte sowie der angehängten Bild-, Ton- und Informationsmaterialien.
Die Nutzung von hier veröffentlichten Informationen zur Eigeninformation und redaktionellen Weiterverarbeitung ist in der Regel kostenfrei. Bitte klären Sie vor einer Weiterverwendung urheberrechtliche Fragen mit dem angegebenen Herausgeber. Bei Veröffentlichung senden Sie bitte ein Belegexemplar an service@pressebox.de.