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Notas de Aplicação
One of the primary instruments used when designing and testing A4WP compliant wireless charging products is an oscilloscope. Although many of the required conformance test measurements may be relatively easy to perform during the power transfer state when current is continuous, performing many of the timing and current measurements during the power save state (beacons) can be much more complex. There are many advanced oscilloscope settings and measurements that you may not be aware of that makes these measurements possible and will also provide enhanced accuracy and repeatability of A4WP oscilloscope measurements.
This application note is Part 2 of a 3-part series on A4WP wireless charging measurements. This part focuses on performing ITX_COIL measurements during the power save state (beacons), including beacon timing measurements. Part 1 focuses on ITX_COIL measurements during the power transfer state (non-beacons), and Part 3 focuses on power and efficiency measurements. Refer to Part 1 and Part 3 for additional A4WP testing information.
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