Texas Instruments (TI) announced the Qi-Certified Wireless Power (WPC) v1.2 solution for 15-W operation wireless power transmission for Smart Phones, Tablets, and Other Handheld devices, Point-of-Sale devices and other custom wireless power applications.
Bq501210 supports Bi-directional Communication and fast charge operation with compatible receivers. The user is informed for the state of charge by 10 configurable LED codes that indicate also fault status.
If you’re not familiar with the term of wireless power transmission then let’s see how TI describes it in the datasheet. It basically consists of a transmitter and receiver coils. When the receiver coil is positioned on the transmitter coil with some distance (wireless), magnetic coupling occurs when the transmitter coil is driven. The flux is coupled into the secondary coil, which induces a voltage and current flows. The secondary voltage is rectified, and power can be transferred effectively to a load.
According to the datasheet, bq501210 supports multiple levels of protection against heating metal objects placed in the magnetic field.
TI provides an evaluation module bq501210EVM-756 costs 150$ with the following features:
- WPC v1.2 15-W charging capability with bq55221 receiver.
- 5-W solution for WPC v1.1 receivers.
- 15-V to 19-V input and fixed operatiing frequency for full 15-W results.
- 12-V input for reduced power (> 10W) solutions.
- Enchanced Foreign Object Detection (FOD) with FOD ping detecting objects prior to power transfer.
- WPC v1.2 FOD, WPC v1.1 FOD and WPC v1.0 Parasitic metal Object Detection (PMOD).
- Transmitter-coil mounting pad providing the corect ereceiver interface.
- Compact power section design using the bq500100 NexFET power stage.
- Wurth 760 308 141 transmitter coil with no magnet.
- LED and audio indication of power transfer.
Bq501210 is available in 9*9mm 64-VQFN package and is priced at US$3.75 in 1,000-unit quantities.