TI introduces wireless power transfer circuit
Sep 20, 2013 (MarketLine via COMTEX) --
Texas Instruments Incorporated, or TI, a semiconductor design and manufacturing company, has introduced the bq500212A transmitter, a wireless power transfer circuit to support the Wireless Power Consortium, or WPC, 1.1 specification.
The bq500212A transmitter, which is shipping in volume production, requires one-third fewer components than competitive solutions. The circuit allows designers to quickly take to market Qi-compliant wireless charge pads or stations that can operate from a USB port or 5-V power adapter, the company said.
With more Qi charging stations available in the marketplace, consumers of Qi-enabled smartphones, smartwatches and many other "enclosed" portable consumer electronics will be able to keep their batteries charged longer. Products like the Kickstarter-born AGENT Smartwatch are using TI's bqTESLA wireless power products, including the bq500212A and a bq51050B receiver, to ensure wireless power capability, the company added.
According to the company, bq500212A needs only five components, including two new CSD97376 Power Stage integrated circuits; while other products may require up to 15 devices. TI's Dynamic Power Limit technology enables the transmitter to work from either a USB port or low-power adapter. The device's standby mode ensures <100 mW of standby power with no receiver on the pad and <50 mW once the receiver has finished charging. Hybrid capacitor scheme significantly reduces system bill of materials cost by using a combination of X7R and COG capacitors instead of only relying on COG capacitors. Foreign Object Detection, as mandated by the WPC1.1 specification, comes standard on the bq500212A, which features an improved algorithm with greater accuracy of error sensing.
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