Adapter power chips speed adoption of universal charging

August 01, 2012 // By Julien Happich
Texas Instruments has released high-efficiency power management controllers that save standby power to help smartphone users consume less electricity with their 5-watt cube adapters, even when they are left plugged into the wall.

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.

Phone and adapter makers strive to meet the new 5-Star no-load power consumption rating of <30mW, as set by the European Commission's Integrated Product Policy (EC IPP). The highly efficient UCC28700 flyback controller achieves this low standby power rating with the smallest solution size and component count resulting in the greatest power density. The UCC28700 requires only a 1.5-uA startup current. With primary side regulation, it eliminates the need for an opto-feedback circuit. The chip operates from a wide VDD input voltage range. 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.

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