US 11,863,080 B2
Active-clamped isolated sepic converter in the MHz range for low-power subnets
Stefano Cabizza, Padua (IT); Giorgio Spiazzi, Padua (IT); and Cristian Garbossa, Bressanone (IT)
Assigned to Infineon Technologies AG, Neubiberg (DE); and Università Degli Studi di Padova, Padua (IT)
Filed by Infineon Technologies AG, Neubiberg (DE)
Filed on Feb. 15, 2022, as Appl. No. 17/651,137.
Prior Publication US 2023/0318472 A1, Oct. 5, 2023
Int. Cl. H02M 1/08 (2006.01); H02M 3/335 (2006.01); H02M 3/158 (2006.01); B60R 16/03 (2006.01); H02M 1/38 (2007.01); H02M 1/34 (2007.01)
CPC H02M 3/33592 (2013.01) [B60R 16/03 (2013.01); H02M 1/083 (2013.01); H02M 1/34 (2013.01); H02M 1/38 (2013.01); H02M 3/1588 (2013.01)] 20 Claims
OG exemplary drawing
 
9. A system comprising:
a power supply configured to produce a voltage within a predetermined voltage range;
a power converter circuit, the circuit comprising:
an input terminal configured to receive from the power supply, the voltage within the predetermined voltage range;
an output terminal;
a transformer configured to isolate an output terminal of the circuit from an input terminal of the circuit, wherein the transformer includes a leakage inductance and a magnetizing inductance;
a resonance capacitor in series with the leakage inductance, wherein a value of capacitance for the resonance capacitor, a value for the magnetizing inductance and a value for the leakage inductance configure the circuit to operate in resonant discontinuous conduction mode (DCM);
a switch node;
a clamping switch;
a main switch; and
a loop controller configured to:
drive control terminals of the main switch and the clamping switch;
operate the power converter circuit with a dead time:
wherein both the main switch and the clamping switch are off during the dead time, and
wherein a voltage at the switch node transitions between a first voltage magnitude and a second voltage magnitude within the dead time.