Multi-phase buck switching power supply
AssigneeEfficient Energy GmbH
InventorHolger Sedlak
Life of this patent
Estimating the term…
Abstract
A switching power supply includes a plurality of parallel branches, each parallel branch including two serially connected controllable switches and a coil connected between the two switches and an output node, a capacitor connected between the output node of the parallel branches and ground; and a controller configured to switch the two serially connected controllable switches of each parallel branch such that a first switch of a parallel branch is switched from a conducting state to a non-conducting state when a current flowing through a coil of the parallel branch reaches a first current value larger than 5 A, and such that the second switch is switched from a conducting state to a non-conducting state when the current flowing through the coil of the parallel branch reaches a second current value smaller than 0 A.
Claims13
Switching power supply comprising:
- a plurality of parallel branches, each parallel branch comprising two serially connected controllable switches and a coil connected between the two switches and an output node;
- a capacitor connected between the output node of the parallel branches and ground, and
- a controller configured to switch the two serially connected controllable switches of each parallel branch such that a first switch of a parallel branch is switched from a conducting state to a non-conducting state when a current flowing through a coil of the parallel branch reaches a first current value larger than 5 A, and such that the second switch is switched from a conducting state to a non-conducting state when the current flowing through the coil of the parallel branch reaches a second current value smaller than 0 A,
- an LC filter comprising a filter capacitor and a filter coil and being connected upstream from the plurality of parallel branches, so that an input node of each parallel branch is connected to a first terminal of a filter capacitor and to a first terminal of a filter coil, a second terminal of the filter capacitor being connected to a ground terminal, and a second terminal of a filter coil being connected to an input node of the switching power supply, wherein the filter capacitor comprises a positive terminal, a negative terminal, and a third terminal, the third terminal comprising an elongated lead connected to the negative terminal and being arranged at least partly next to the positive terminal,
- a board, the filter capacitor being arranged on one side of the board and the switches and the coils being arranged on another side of the board, a positive terminal of the filter capacitor extending through a bore through the board, the third terminal, which comprises a ground path, being arranged, on the one side of the board, next to the bore within the board for the positive terminal, and one or several ground terminals of the second switches extending through the board and being connected to the third terminal of the filter capacitor.
Method of operating a switching power supply comprising a plurality of parallel branches, each parallel branch comprising two serially connected controllable switches and a coil connected between the two switches and an output node;
- and a capacitor connected between the output node of the parallel branches and ground, an LC filter comprising a filter capacitor and a filter coil and being connected upstream from the plurality of parallel branches, so that an input node of each parallel branch is connected to a first terminal of a filter capacitor and to a first terminal of a filter coil, a second terminal of the filter capacitor being connected to a ground terminal, and a second terminal of a filter coil being connected to an input node of the switching power supply, wherein the filter capacitor comprises a positive terminal, a negative terminal, and a third terminal, the third terminal comprising an elongated lead connected to the negative terminal and being arranged at least partly next to the positive terminal, a board, the filter capacitor being arranged on one side of the board and the switches and the coils being arranged on another side of the board, a positive terminal of the filter capacitor extending through a bore through the board, the third terminal, which comprises a ground path, being arranged, on the one side of the board, next to the bore within the board for the positive terminal, and one or several ground terminals of the second switches extending through the board and being connected to the third terminal of the filter capacitor, comprising:
- controlling the two switches of each parallel branch such that a first switch of a parallel branch is switched from a conducting state to a non-conducting state when a current flowing through a coil of the parallel branch reaches a first current value larger than 5 A, and such that the second switch is switched from a conducting state to a non-conducting state when the current flowing through the coil of the parallel branch reaches a second current value smaller than 0.
Dependencies are inferred from the claim text.