Abstract: A leakage transformer is provided. The leakage transformer includes a first plate, a second plate, a plurality of winding pillars, a primary winding, a secondary winding and a plurality of magnetic shunt elements. Each magnetic shunt element is disposed between the two corresponding winding pillars, and there is a gap between every two neighboring magnetic shunt elements. Alternatively, the magnetic shunt element is disposed on the first plate and aligned with the corresponding winding pillar, and there is a gap between the magnetic shunt element and the second plate. A leakage inductance of the leakage transformer is determined by the gap.

Abstract: A leakage transformer is provided. The leakage transformer includes a first plate, a second plate, a plurality of winding pillars, a primary winding, a secondary winding and a plurality of magnetic shunt elements. Each magnetic shunt element is disposed between the two corresponding winding pillars, and there is a gap between every two neighboring magnetic shunt elements. Alternatively, the magnetic shunt element is disposed on the first plate and aligned with the corresponding winding pillar, and there is a gap between the magnetic shunt element and the second plate. A leakage inductance of the leakage transformer is determined by the gap.

Abstract: A leakage transformer is provided. The leakage transformer includes a first plate, a second plate, a plurality of winding pillars, a primary winding, a secondary winding and a plurality of magnetic shunt elements. Each magnetic shunt element is disposed between the two corresponding winding pillars, and there is a gap between every two neighboring magnetic shunt elements. Alternatively, the magnetic shunt element is disposed on the first plate and aligned with the corresponding winding pillar, and there is a gap between the magnetic shunt element and the second plate. A leakage inductance of the leakage transformer is determined by the gap.

Abstract: A resonant power converter and a current synthesizing method therefor are provided. The resonant power converter includes a switch circuit, a resonant tank, a transformer, a rectifier circuit, and a current synthesizing module. The switch circuit receives an input voltage from an input source, and the rectifier circuit outputs an output voltage to a load. The current synthesizing module includes a sensing circuit, a peak hold circuit, and a calculation unit. The sensing circuit is configured to sense a resonant capacitor voltage on a resonant capacitor of the resonant tank. The peak hold circuit is configured to receive the resonant capacitor voltage and acquires a peak value thereof. The calculation unit is configured to receive the peak value, a switching frequency, the input voltage, the output voltage, and a resonant capacitance of the resonant power converter and generate a synthesized output current accordingly.