Patent ID: 8456144

Claim:
A power supply with non-isolated DC DC splitting, for supplying a direct current voltage based on a direct current voltage applied to the input, comprising n parallel, interlaced conversion cells, n being at least equal to 2, each cell comprising a main switch receiving a command to switch to the closed state and to the open state in order respectively to close or open a conduction path between a first node and a second node of the cell, allowing respectively a phase for storing energy in a storage element and a phase for transferring energy to an output capacitor connected between an output terminal of the cell and a common terminal, said main switch forming part of a resonant circuit comprising an auxiliary switch making it possible to trigger a resonance phase of the resonant circuit, wherein the auxiliary switch comprises means for triggering the resonance phase while the main switch of the cell in question is in the closed state, said resonance phase allowing the cancellation of the current in said main switch of the cell, and means for opening the main switch during said cancellation of the current, wherein said resonant circuit comprises: a first inductor connected in series between said switch and said first node, and a first diode connected in parallel to said switch with its anode connected to said second node and its cathode connected to the connection point between the switch and said first inductor; and a second diode and a resonance capacitor connected in series between said first and second nodes, a second inductor and an auxiliary switch in parallel on said resonance capacitor, said second inductor being connected to the connection point between said resonance capacitor and said second diode; a third diode in parallel on said auxiliary switch, with its cathode connected to the connection point between said auxiliary switch and said second inductor.