Patent ID: 8729853

Claim:
A wireless charging device, which is applicable to a portable electronic device having a circuit device, the circuit device being electrically connected to a power receiving terminal and a battery, the wireless charging device comprising: a logic control unit, which comprises a plurality of pins; a wireless transmission unit, which has a transmission terminal and a test terminal, the test terminal being electrically connected to a detection pin of the logic control unit; a step-up/step-down unit, which has a first voltage regulation terminal, a second voltage regulation terminal, and two control terminals, the second voltage regulation terminal being electrically connected to the transmission terminal of the wireless transmission unit, the two control terminals being respectively and electrically connected to first and second control pins of the logic control unit, a power pin of the logic control unit being electrically connected to the second voltage regulation terminal and the transmission terminal that are connected to each other, the step-up/step-down unit being a step-up/step-down unit with synchronous rectification; a first reverse current protector, which has an input terminal, an output terminal, and a control terminal, the input terminal and the output terminal being respectively and electrically connected to a discharging terminal of the battery and the first voltage regulation terminal of the step-up/step-down unit, the control terminal being electrically connected to a third control pin of the logic control unit; wherein the control terminal of the first reverse current protector and the third control in of the logic control unit form therebetween a second node and the discharging terminal of the battery and the input terminal of the first reverse current protector form therebetween a third node, the second and third nodes being electrically connected to each other, the second node being electrically connected to a signal output terminal of the circuit device; a second reverse current protector, which has an input terminal, an output terminal, and a control terminal, the output terminal and the input terminal being respectively and electrically connected to the power receiving terminal of the circuit device and the first voltage regulation terminal of the step-up/step-down unit, the control terminal being electrically connected to a fifth control pin of the logic control unit; and a first supercapacitor, which has an end electrically connected to a connection between the power receiving terminal of the circuit device and the output terminal of the second reverse current protector and forming a first node at the connection and an opposite end grounded.