Dual-mode Qi, PMA wireless power receiver

March 03, 2014 // By Jean-Pierre Joosting
Claiming to be the industry's smallest, most efficient wireless power receiver to support both the Wireless Power Consortium's (WPC) Qi 1.1 and Power Matters Alliance (PMA) specifications, the bq51221 inductor-less, 5-W receiver's high efficiency and programmable output reduces power loss by as much as 50 percent compared to existing receivers.

This receiver from Texas Instruments enables consumers to more efficiently and quickly charge their mobile phones, headsets and power banks from a Qi or PMA charging station.

The dual-mode, 5-W receiver is compliant with Qi 1.1 and PMA communication and control, achieves up to 96 percent power efficiency, and features an adjustable output voltage that helps reduce power loss by as much as 50 percent.

Coming in at 3.6-mm by 2.9-mm by 0.5-mm, this single-chip wireless power receiver achieves a solution size of 75 mm 2 without the need for an inductor.

In addition to the dual-mode receiver, TI also introduced its bq51010B next-generation Qi 1.1-compliant receiver with an integrated 7-V regulated supply and foreign object detection. The single-chip receiver, also shipping in volume production, achieves 93 percent power efficiency and ensures the lowest possible power dissipation when charging a Qi-compliant smartphone.

Both the bq51221 and bq51010B wireless power receivers are available now in volume production to customers worldwide. Qi-only versions of the bq51221 are currently sampling to select customers, and are expected to be available in volume production in the second quarter. Designers can also order the bq51221EVM-520 evaluation module to get started on dual-mode wireless power receiver designs.