5-V, Qi-compliant wireless power transmitter helps the adoption of USB-connected wireless charging pads

September 14, 2012 // By Paul Buckley
Texas Instruments Incorporated has introduced the industry’s first wireless power transfer controller that allows consumers to operate a Qi-compliant charging pad from any USB port or 5-V power adapter.

Designed for 5-V systems, the bq500211 transmitter circuit allows the charging pad to safely engage with a Wireless Power Consortium (WPC) Qi-compliant device, such as a smartphone or other portable electronics device, receive packet communication and efficiently manage the power transfer. The bq500211 also features TI’s Dynamic Power Limit feature to optimize available power from a limited power source.  

The bq500211 is the first integrated transmitter circuit to allow consumers to plug a wireless power pad into any USB port or 5-V power system.
The device enables intelligent control of wireless power transfer by using TI’s Dynamic Power Limit technology optimizes available power from limited input supplies.
The circuit can operate as a WPC A5 transmitter with a magnetic positioning guide or as an A11 transmitter without the need of a magnet.  The device provides comprehensive charge status mode and fault indication features alert the user of any abnormal condition during power transfer.

Availability and Pricing

The new bq500211 wireless power transmitter comes in a 48-pin, 7-mm by 7-mm QFN package with a suggested resale price of US$3.95 each in 1,000-unit quantities. The bq500211 is available in volume production through TI and its worldwide network of authorized distributors.

More information about the bq500211 wireless power transmitter at www.ti.com/bq500211-pr