Patent ID: 8803769

Claim:
A DC-DC converter, comprising: a voltage detector for detecting a voltage from a power supply; a booster circuit for receiving and boosting the voltage from the power supply to generate and output a first power; an inverter circuit for receiving and inverting the voltage from the power supply to generate and output a second power; and a pulse width modulation (PWM) controller for controlling the booster circuit and the inverter circuit to control voltages of the first power and the second power, adapted for reducing the voltage from the power supply to be lower than the voltage of the first power when the voltage from the power supply detected by the voltage detector is higher than a reference voltage, wherein the PWM controller is configured to output a control signal for controlling the booster circuit and the inverter circuit, and to control a pulse width of the control signal in accordance with the voltage from the power supply, and wherein the booster circuit comprises: a first inductor coupled to the power supply; a first switch having a turn-on or turn off state determined in accordance with the control signal, a first electrode coupled to a first node and a second electrode coupled to a ground such that the first inductor is charged with a first voltage in accordance with the turn-on or turn-off state; and a second switch having a turn-on or turn off state determined in accordance with the control signal, a first electrode coupled to the first node and a second electrode coupled to an output terminal of the booster circuit.