INTRODUCING…
The two newest members of Texas Instruments’ family of Qi-compliant wireless power receivers, with 93 percent AC/DC efficiency and WPC 1.1 features to safely and efficiently charge mobile devices.
Texas Instruments has introduced two new wireless power receivers for safe, portable charging of lithium-ion and lithium polymer batteries used in mobile consumer electronics. Both the new bq51050B and bq51051B are fully compliant with the Wireless Power Consortium’s Qi near-field communication protocols, to rectify and condition the signal from a transmitter and apply power directly to a rechargeable battery.
The 050B and 051B are highly efficient integrated wireless power receiver solutions. Integrated within both are a low-impedance synchronous rectifier, a low-dropout regulator (LDO), digital control, and accurate voltage and current loops.
Combined with a Texas Instruments transmitter-side controller, the two receivers enable a complete wireless power transfer system for direct-battery charging.
SEE HOW THEY WORK
In this Texas Instruments video demonstration, a TI engineer describes both receivers and how they receive and transfer power wirelessly. Key points include the makeup of both transmitter and receiver, how coils in each communicate with one another, the AC/DC conversion process, conditioning to improve the quality of power, and the receivers’ communication circuits that manage the signal from the transmitter.
TI’s 050B and 051B wireless power receivers are of the direct-charging type, containing their own integrated battery chargers. The two receivers differ only in their regulation voltage: the 050B provides 4.2-volt regulation voltage, while the 051B provides 4.35-volt regulation voltage.
As for power supplies, users can choose between a 5-volt solution and a 7-volt solution. Select from among Texas Instruments’ entire range of wireless power receivers, depending on which voltage level is required.
Using either 050B or 051B wireless receiver is straightforward. The transmitter is connected to a power source, while the receiver with its integrated charger is connected to the rechargeable battery. Then, simply place the receiver on top of the transmitter and communications between the two begin automatically. The AC signal from the receiver coil is rectified and conditioned to apply power directly to the mobile device’s battery, with the receiver controlling and stabilizing the power transfer process.
Visit TI.com for more details on the newest members of Texas Instruments’ wireless power receivers—the bq51050B and the bq51051B.
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