NON-CONTACT POWER SUPPLY DEVICE

摘要

An FET (2H) is always off and an FET (2L) is always on in a presence detection. The FETs (1H, 1L) are alternately switched on and off. When in half-bridge operation, power consumption is lower than when in full-bridge operation. Accordingly, magnetic energy of a power supply coil (L1) in the half-bridge operation is lower than magnetic energy of the power supply coil (L1) in the full-bridge operation. Hence, even when power supply coils (L1) which are located in close proximity to one another have respectively carried out power supply and presence detection, interference by magnetic energy from the power supply coil (L1) in line with presence detection with magnetic energy from the power supply coil (L1) in line with power supply is suppressed.