Abstract: Embodiments of the invention provide a power supply including a transformer comprising a single output terminal on a secondary side, a first output unit comprising a first capacitor and connected to the single output terminal to output a first output voltage, a second output unit comprising a second capacitor having a larger capacity than the first capacitor and connected to the single output terminal to output a second output voltage, and a controller configured to control the first output voltage to be output until power is applied and charging of the second capacitor is started.

Abstract: Disclosed herein are a power supply having a wide output voltage range and a power supplying method, and the power supply according to the present disclosure includes a power unit adjusting magnitude of a driving voltage in response to a turn ratio of a first winding and a second winding, and a controlling unit outputting a control signal that adjusts the turn ratio of the first winding and the second winding in response to the magnitude of the driving voltage.

Abstract: The object of the present invention is to provide a power converter with a wide range of an output voltage and a driving method for the same. The present invention provides a power supply unit for outputting any one of a first voltage and a second voltage and a control unit for outputting a control signal to select any one of the first voltage and the second voltage to select an output terminal voltage of the power supply unit and to be supplied in the power supply unit.

Abstract: Embodiments of the invention provide a power supply including a transformer comprising a single output terminal on a secondary side, a first output unit comprising a first capacitor and connected to the single output terminal to output a first output voltage, a second output unit comprising a second capacitor having a larger capacity than the first capacitor and connected to the single output terminal to output a second output voltage, and a controller configured to control the first output voltage to be output until power is applied and charging of the second capacitor is started.

Abstract: The present invention provides a control circuit of an LLC resonant converter including a minimum switching frequency variable circuit of varying a minimum switching frequency corresponding to an AC input voltage of the LLC resonant converter; and a first pulse signal generating unit and a second pulse signal generating unit to generate a first pulse signal and a second pulse signal based on a switching frequency limited by the minimum switching frequency variable circuit.

Abstract: The present invention provides a control circuit of an LLC resonant converter including a minimum switching frequency variable circuit of varying a minimum switching frequency corresponding to an AC input voltage of the LLC resonant converter; and a first pulse signal generating unit and a second pulse signal generating unit to generate a first pulse signal and a second pulse signal based on a switching frequency limited by the minimum switching frequency variable circuit.