Resonance Capacitors; Figure 7. Resonance Capacitors - Renesas P9235A-RB Layout Manual

P9235A-RB Layout Guide

Resonance Capacitors

Next, place the resonance components. The C44, C47, C48, C49, and C51 capacitors should have wide copper planes connected to them
and be in-line from the P9235A-RB to the Tx coil. C0G capacitors will offer the highest performance and are recommended. X7R and X5R
can be substituted, but low-ESR components should be used. Since all the load current and the current required to transmit energy to the
receiver flows through the resonance capacitors, the heat developed within the resonance capacitors (Class II only) should be given
opportunity to spread into large copper planes.
Figure 7. Resonance Capacitors
© 2019 Integrated Device Technology, Inc 8 March 19, 2019