Home > Products > TI’s new power-distribution switches provide highly accurate current limits

Power

TI’s new power-distribution switches provide highly accurate current limits

5th January 2009

ES Admin

0 0

Datasheet

Four new power-distribution switches from Texas Instruments 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.