ST STDES-50W2CWBC, Technical Notes, Page: 20 / 26

7 Conclusions
The test results show the STDES-50W2CWBC reference design can automatically detect and charge the PX by
either of the two coils.
•
The Rx output could be from 5 V to 20 V by the ST Super Charge proprietary protocol (STSC).
• The ASK demodulation works well.
• The Q-factor estimation by either of the two coils is close to the LCR meter.
The STDES-50W2CWBC reference design achieved the expected performance.
TN1399
Conclusions
TN1399 - Rev 1
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