TI power-adapter chip conserves energy

Date
08/01/2012

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Controllers save power and space

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Texas Instruments has introduced high-efficiency power controllers that save standby power to help smartphone users consume less electricity with their 5-watt cube adapters, even when left plugged into the wall. The new UCC28700 primary-side controllers will also enable smaller cubes, wireless power charging stations, and other AC-powered equipment. TI also introduced the TPS2511, an intelligent USB charging-controller that complies with USB Battery Charging 1.2 specifications for charging adapters of both popular smartphones or 5-V tablets. No-load adapter power Phone and adapter makers strive to meet the new 5-Star no-load power consumption rating of < 30 mW, as set by the European Commission's Integrated Product Policy (EC IPP). The efficient UCC28700 flyback controller achieves this low standby power rating with the smallest size and component count, resulting in high power density. Key features and benefits of the UCC28700

  • Low standby power: Achieves < 30-mW standby power consumption and requires only 1.5-uA startup current.
  • High integration with primary side regulation: Eliminates opto-feedback circuit; wide input voltage range and hysteresis with low IDD standby current results in smaller capacitors; high-frequency operation allows smaller transformers; requires no additional external circuitry.
Making smartphone and tablet charging universal Today's mobile users are frustrated with phone and tablet 5-W and 10-W chargers that only support one brand-name device. Consumers often need a new charger when they purchase a new mobile device, adding to the number of adapters in a home - and ultimately adding to landfills. 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. Key features and benefits of the TPS2511
  • Meets requirements set forth by USB Battery Charging 1.2, and the Chinese Telecom Specification YD/T 1591-2009.
  • Supports many popular smartphones or 5-V tablets using universal charging capability.
Speed time-to-market with charging-adapter reference designs In addition to evaluation modules, TI introduced several new reference designs for download that include the TPS2511, UCC28700, and other TI power management circuits. (See links below.) Availability and pricing The UCC28700 flyback controller is available in a 6-pin SOT-23 package, and is priced at $0.35 (1000). The TPS2511 universal charger controller comes in a 3 x 5-mm MSOP-8, and is priced at $0.90 (1,000). Texas Instruments
UCC28700 product deeplink TPS2511 product deeplink Universal-AC-input reference design deeplink Universal USB car-charger application note Dual Universal USB car-charger application note

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