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Power feeding device and control circuit thereof, power receiving device and control circuit thereof, electronic device and charging adapter using the same, and abnormality detection method
Power feeding device and control circuit thereof, power receiving device and control circuit thereof, electronic device and charging adapter using the same, and abnormality detection method
A power supply apparatus supports USB-PD (Universal Serial Bus-Power Delivery) specification. A bus voltage VBUS is transmitted via a bus line. A first power supply circuit generates a first bus voltage having a first voltage level. A second power supply circuit generates a second bus voltage having a second voltage level that is higher than the first voltage level. A first switch is arranged between the bus line and an output terminal of the first power supply circuit. A second switch is arranged between the bus line and an output terminal of the second power supply circuit. A control circuit receives a control signal S1 via the bus line from a power receiving apparatus, which is a power supply target. The control circuit is structured to control the first switch and the second switch based on the control signal S1.
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