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Power chips help conserve energy, speed adoption of universal charging

Tue, 07/31/2012 - 11:48am

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Texas Instruments introduced power management controllers that are said to save standby power to help smart phone users consume less electricity with their 5-W cube adapters, even when they are left plugged into the wall. According to the company, the UCC28700 primary-side controllers will enable smaller cubes, wireless power charging stations and other AC-powered equipment. TI also introduced the TPS2511, an intelligent USB charging port controller that complies with USB Battery Charging 1.2 specifications for charging adapters of popular smartphones or 5-V tablets. Features of the UCC28700 include: <30-mW standby power consumption,  and 1.5-uA startup current requirement; it eliminates need for opto-feedback circuit; wide VDD input voltage range and hysteresis with low IDD standby current results in smaller capacitors; high-frequency allows smaller transformers; and requires no additional external circuitry.  TI’s TPS2511 intelligent USB charge controller meets the USB Battery Charging 1.2 specification, and provides additional charge algorithms to the system. It combines a current-limit USB power switch and a USB dedicated charging port identification circuit to automatically detect USB 2.0 and 3.0 data line voltages and provide the correct electrical signature to safely charge compliant devices.

Texas Instruments
800-477-8924, www.ti.com

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