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TI rolls out transmitter for Qi charging stations

13 Sep 2013

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Texas Instruments on Wednesday unveiled the bq500212A wireless power transfer circuit, a transmitter designed according to the Wireless Power Consortium 1.1 specification. The product helps expedite the commercialisation of Qi-compliant wireless charging stations or pads that can be used with a 5V power adapter or USB port.

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.

Features and benefits of bq500212A:

  • Complete WPC 1.1 Qi-compliant design: bq500212A needs only five components, including two new CSD97376 Power Stage integrated circuits; while other products may require up to 15 devices.
  • Intelligent power control: 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 less than 100mW of standby power with no receiver on the pad and less than 50mW 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.

The new bq500212A wireless power transmitter comes in a 48-pin, 7-mm by 7-mm QFN package with a suggested resale price of US$2.78 each in 1,000-unit quantities. The bq500212A is available in volume production through TI and its worldwide network of authorised distributors.




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