Resonance-type power supply apparatus

摘要

There is provided a resonance-type power supply apparatus capable of controlling primary side switching by estimating output power based on resonance current of the primary side. The resonance-type power supply apparatus includes 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 first 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, and a controlling unit controlling the switching of the switching unit based on resonance power information input to the primary winding of the transformer by the resonance unit.

主权项

1. 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; and a controlling unit controlling the switching of the switching unit based on timing that resonance power information input to the primary winding of the transformer by the resonance unit meets a reference value.