P9261-3C-CRBv2 Power-Loss and FOD Tuning Guide
The P9261 Automotive CRB 2.0 Wireless Power Transmitter (Tx) is used to transmt wireless power to wireless power receivers (Rx) devices following WPG specifications and protocols. An important operating attribute of all WPC systems is the ability to detect Foreign Objects (FO) by measuring the power that is being absorbed by the object. In stardard operating mode, the Rx device will sened a Received Power Packet (RPP) approximately every 500ms. The RPP informs the Tx how much power the Rx is CLTentiy receiving and includes the estimate of the power loss in the Rx device due to friendly metal energy absorption. Once the RPP is received, the Tx compares th s power to the Txpower (see Equation 1) and if three consecutive results of PDiff (see Equation 2) are above the PThreshold. then the Tx wll shut down cue to FOD alarm.
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Application note & Design Guide |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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2022-05-02 |
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Rev.1.00 |
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R16AN0023EU0100 |
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703 KB |
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