Switching-mode power converter with complementary synchronous rectification

A switching-mode power converter comprising:

• input and output circuits;
• a transformer having primary and secondary windings respectively coupled to said input and output circuits, said secondary winding includes first, second and mid terminals, said primary winding includes third and forth terminals;
• first and second switching circuits, each of said switching circuits having one end coupled to one of said first and second terminals of said secondary winding and an other end connected to a common node;
• third and fourth switching circuits respectively coupled to said third and fourth terminals of said primary windings;
• a filter circuit having an inductor and a capacitor connected in series, said inductor being connected to said mid terminal of said secondary winding, and said capacitor being connected to said common node;
• and
• first and second complementary control circuits respectively disposed to drive said first and second switching circuits, said first complementary control circuit being disposed between said first and third switching circuits, and said second complementary control circuit being disposed between said second and fourth switching circuits, each of said complementary control circuits includes an inverter circuit having an inverter input, a resistor and a diode connected in parallel disposed at said inverter input, said inverter circuit further including a capacitor disposed at said inverter input.