RESONANCE TYPE SWITCHING POWER SOURCE

摘要

PROBLEM TO BE SOLVED: To provide a circuit configuration for reducing a common mode noise by lowering a potential difference between a primary winding and a secondary winding in an AC resonance type switching power source circuit. SOLUTION: The resonance type switching power source comprises a current resonance unit having the primary winding of a transformer, and a secondary side rectifying and smoothing unit for rectifying and smoothing a signal induced in the secondary winding of the transformer. The resonance unit connects one ends of the windings to a stable potential part of a converter so as to lower a potential difference between the primary winding and the secondary winding of the transformer, and does not connect the other end being unconnected.