TIDA-00334: TI design TIDA-00334 wireless power supply transmitter is an application of the bq500212A IC in a small form factor design targeted at low power wearable devices. Input voltage to the unit is 5V from a Micro USB connector. The low power design will support output power at the receiver up to 2.5W. All key transmitter circuits are laid out in a 30mm area which matches the diameter the Wurth coil P/N 760308101103. This area is slightly larger than a US Quarter or 2 Euro coin. PCB is 38mm X 76mm (1.5” X 3.0”) but area for the circuit is inside the 30mm coil diameter is about 700mm2.
TIDA-00657: The TIDA-00657 reference design enables high efficiency (90+% @1-2A) and faster charge with high charging current up to 3A. The design uses TI's BQ24780 Industrial Innovative Charge Controlller with Hybrid Power Boost Mode and also features power and processor hot monitoring capability.