Mouser offers Qi wireless power transmitter
Claimed to be the industry’s first WPC (Wireless Power Consortium) v1.2 Qi-certified 15W wireless power transmitter, the bq501210 is now available from Mouser.
Texas Instruments claims that the transmitter enables 84 per cent system efficiency with significantly less thermal dissipation than traditional wireless power devices. It supports multiple fast-charging protocols and operates with any Qi WPC v1.1 receiver for personal electronics, medical, and space-constrained industrial applications.
The transmitter periodically ‘pings’ for available devices to be powered, it detects if a foreign metal object is present on the charging pad, and monitors all communication from the device being wirelessly powered. It adjusts power applied to the transmitter coil per feedback received from the powered device. It includes a 5V full-bridge power stage and manages the fault conditions associated with the power transfer and controls the operating mode status indicator. Up to 15W continuous power is delivered into a Qi-compliant type MP-A5 transmitter coil. The device is backwards- compatible with existing 5W WPC receivers, and uses a rail voltage control scheme instead of the traditional frequency control to adjust the amount of power delivered to the receiver.
The transmitter is available in a 64pin, 9 × 9mm VQFN package, and is supported by the bq501210EVM-756 evaluation module. The module provides the basic functions of a Qi-compliant, wireless charger pad and has a 19V input, single-coil transmitter.