Electronic device comprising charging circuit

An electronic device, comprising:

• a battery;
• a receive coil configured to wirelessly receive power from a transmit coil of a wireless charger;
• and
• a power management module electrically connected with the battery and the receive coil, wherein the power management module includes:
• a rectifier circuit configured to rectify current flowing in the receive coil, the rectifier circuit including an output terminal, wherein the output terminal outputs a rectified current;
• a charging circuit configured to charge the battery including a plurality of switches and an input terminal, the input terminal connected to the output terminal of the rectifier circuit;
• and a rectifying capacitor connected to a node where both the output terminal of the rectifier circuit providing the rectified current, and the input terminal of the charging circuit are connected, and
• wherein the power management module generates a sync signal based on current flowing in the output terminal of the rectifier circuit and controls whether the plurality of switches operate or switching frequencies of the plurality of switches, based on the sync signal,
• wherein the charging circuit includes a first switched capacitor voltage divider (SCVD) circuit and a second SCVD circuit, and
• wherein the first SCVD circuit and the second SCVD circuit alternatingly charge the battery.