Power Management ICs Forum Discussions

[MS_19060803]

Hi all,

We assume the distance between the transmitting coil and receiving coil is from 50mm to 1000mm.

Could you please tell me if there is a way to transmit this distance with high efficiency on the evaluation board(REFWLCTX15WC1)?

Please let me know too if it is possible to achieve the high efficiency by changing the coil shape, etc.

I think that it is difficult to transmit over a long distance since Qi is an electromagnetic induction method, but I would appreciate it if you could give me some advice.

Best regards,
MS

[Kumarkanahai · Accepted solution]

Hi @MS_19060803 ,

Yes, you have correctly noticed that the Infineon’s wireless charging ICs  WLC1115 is  based on the Qi v1.3.2 system solution.The principle behind the operation of WLC1115 is Electromagnetic induction.So,it will be very diifcult to transfer the power over long distances.The increase in distance will lead to poor coupling between Tx and Rx coils which results in lower flux and hence less efficiency.

Please take a note that REFWLCTX15WC1  has a typical active charging area +/- 10 mm.Moving away from these distance may affect the actual behaviour of the device.

Regards,
Kanahaiya

[MS_19060803]

Hi Kanahaiya-san,

Thank you for your prompt response.

Best regards,
MS