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

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.

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:
o New products
o Application notes
o Parametric search
* TI’s complete power management portfolio: www.power.ti.com