Patent ID: 8897036
Filing Date: 2014-11-25
Classification: H02M,Y02B

Abstract:
1. A switching regulator comprising: series-connected first switch and second switch that are connected to terminals of a DC power supply; a resonant oscillation circuit connected to both terminals of the first switch or the second switch, including a resonance oscillation capacitor, at least one of a resonant oscillation inductance and a leakage inductance of a transformer, and a primary winding in a primary side of the transformer, serially connected; an auxiliary winding that is provided in the primary side of the transformer and detects change of a voltage across the primary winding of the transformer; a differentiation detecting circuit that differentiates a detection voltage detected by the auxiliary winding to detect a timing of start of reversal or a timing of end of reversal of the detection voltage; and a dead time adjusting circuit that generates a second trigger signal at a timing of turning ON the first switch or the second switch after a predetermined delay time from the timing detected by the differentiation detecting circuit for the start of reversal or the end of reversal of the detection voltage detected by the auxiliary winding.