Patent ID: 9716437
Date: 2017-07-25
CPC Classifications: H01F,H02M,Y02B

Claim:
1. A switching power supply comprising: a flyback power converter configured to perform DC-to-DC power conversion, the flyback power converter having a transformer, a low side switch for drawing current from a supply voltage through a primary winding of the transformer, and a high side switch for discharging current from the primary winding of the transformer to a capacitor; and a controller configured to synchronously control the opening and closing of the low side switch and the high side switch so as to form a regulated output voltage in a feedback loop, the output voltage being formed from a current induced in a secondary winding of the transformer wherein, during each switching cycle, the high side switch is held open while the low side switch is closed and then opened and the low side switch is held open while the high side switch is closed and then opened, and wherein a first voltage is generated at a node between the low side switch and the high side switch during operation, and wherein the high side switch is closed when the supply voltage is greater than the first voltage and the high side switch is opened when the first voltage supply voltage falls to a level of the supply voltage.