Resonance-type power supply apparatus

A resonance-type power supply apparatus, comprising:

• a switching unit switching input power;
• a transformer including a primary winding receiving the power switched by the switching unit and a secondary winding magnetically coupled to the primary winding and having a preset turns ratio, and transforming the received switched power according to the turns ratio;
• a resonance unit electrically connected between the switching unit and the transformer and providing a resonance tank resonating with inductance from the transformer in a serial resonance scheme;
• and
• a controlling unit controlling the switching of the switching unit by estimating output power based on timing that resonance power information input to the primary winding of the transformer by the resonance unit meets a reference value.

A resonance-type power supply apparatus, comprising:

• a switching unit switching input power;
• a transformer including a primary winding receiving the power switched by the switching unit and a secondary winding magnetically coupled to the primary winding and having a preset turns ratio, and transforming the received switched power according to the turns ratio;
• a resonance unit electrically connected between the switching unit and the transformer and providing a resonance tank resonating with inductance from the transformer in an inductor-inductor-capacitor (LLC) resonance scheme;
• and
• a controlling unit controlling the switching of the switching unit by estimating output power based on timing that resonance current information input to the primary winding of the transformer by the resonance unit meets a reference value.