POWER TRANSMISSION CONTROL DEVICE, NON-CONTACT POWER TRANSMISSION SYSTEM, POWER TRANSMISSION DEVICE, ELECTRONIC APPARATUS, AND WAVEFORM MONITOR CIRCUIT

摘要

PROBLEM TO BE SOLVED: To provide a non-contact power transmission system which actualizes stable and highly-reliable fault detection in consideration of an operation of other circuit connected to a primary coil.

SOLUTION: A power transmission control device 20 includes a power-transmitting-side control circuit 22 to control an operation of a power transmission device, a driver control circuit 26 to control operations of a first power transmitting driver 13 and a second power transmitting driver 15, and a waveform detecting circuit 28 to perform a waveform detecting process based on a monitor signal of a waveform monitor circuit 14. The first power transmitting driver 13 drives a first node N1 of the primary coil not through a capacitor, and the second power transmitting driver 15 drives a second node N2 of the primary coil through a capacitor C2. A signal path between the primary coil and a low-level power supply potential in the waveform monitor circuit 14 is provided with a switch circuit SW3. The power-transmitting-side control circuit turns ON/OFF the switch circuit SW3 by a switch control signal.

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