Small Wireless Power Transmitter for Low Power Wearable Applications
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Important Note

Wireless power coils: Let’s wrap!

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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.

  • Small Solution Size: Circuit area 30mm round or 700mm2 --PCB 38mm X 76mm
  • 5V operating voltage from common USB inputs
  • Compliant to Qi standard

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Design Files

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TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
BQ500212A  Qi Compliant 5V Wireless Power Transmitter Manager  Battery management  Not Available Not Available
INA199  26V, bi-directional, zero-drift, low-/high-side, voltage output current sense amplifier  Current sense amplifiers  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
BQ500212A Download Download
INA199 Download Download
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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 996 10 Oct 2014
Design files (8)
Title Type Size (KB) Date
ZIP 418 10 Oct 2014
ZIP 2619 10 Oct 2014
PDF 1507 10 Oct 2014
PDF 307 10 Oct 2014
PDF 280 10 Oct 2014
PDF 57 10 Oct 2014
PDF 82 10 Oct 2014
PDF 163 10 Oct 2014

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