CPC H02M 1/36 (2013.01) [H02M 3/06 (2013.01); H02M 3/158 (2013.01); H02M 3/33571 (2021.05); H02M 3/01 (2021.05); H02M 3/07 (2013.01)] | 4 Claims |
1. A power converter comprising a circuit as part of the power converter, wherein the circuit comprises:
a commutation cell, the commutation cell including a start-up capacitor and a flying capacitor connected in series;
a diode, the diode being directly connected between the start-up capacitor and the flying capacitor, and the diode being adapted to prevent reverse current flow during steady state operation;
a first inductor;
a second inductor directly connected to the first inductor;
a first switch connected to an input voltage source of the power converter, the flying capacitor being directly arranged between the first switch and the first inductor;
a second switch comprising a second switch terminal directly connected to a node between the flying capacitor and the first inductor and another terminal directly connected to a ground;
a third switch comprising a third switch terminal directly connected to a node between the first switch and the flying capacitor and another terminal directly connected to the second inductor;
a fourth switch comprising a fourth switch terminal directly connected to a node between the third switch and the second inductor and another terminal directly connected to the ground; and
a pull-down switch directly connected to a node between the start up capacitor and the diode and is configured to pull a potential of an anode of the diode to the ground after a start-up phase of the power converter, and maintain the diode in a reverse biased state of operation during a state of normal operation.
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