DC-DC converter assembly with an output inductor accommodating a power stage attached to a circuit board
First Claim
1. A DC-DC converter assembly, comprising:
- a board having a first side and a second side opposite the first side;
a power stage die of a DC-DC converter attached to the first side of the board;
an output inductor electrically connected to an output of the power stage die and disposed over the power stage die on the first side of the board, the output inductor comprising a magnetic core and an electrical conductor having first and second terminals attached to the first side of the board, the output inductor accommodating the power stage die under the magnetic core so that the power stage die is interposed between the magnetic core and the board;
a load attached to the first side of the board;
a plurality of input capacitors electrically connected to input terminals of the power stage die, the input capacitors that provide a shortest current commutation loop for the power stage die being attached to the first side of the board and the other input capacitors being attached to the second side of the board;
an output capacitor electrically connected between the output inductor and the load, and attached to the second side of the board; and
a plurality of decoupling capacitors electrically connected to power terminals of the power stage die, and attached to the second side of the board,wherein a total footprint of the power stage die, the output inductor, the plurality of input capacitors, the output capacitor and the plurality of decoupling capacitors is at least a third of the combined surface area of the power stage die, the output inductor, the plurality of input capacitors, the output capacitor and the plurality of decoupling capacitors.
5 Assignments
0 Petitions
Accused Products
Abstract
A DC-DC converter assembly includes a board having a first side and a second side opposite the first side, a power stage die of a DC-DC converter attached to the first side of the board, and an output inductor electrically connected to an output of the power stage die and disposed over the power stage die on the first side of the board. The output inductor includes a magnetic core and an electrical conductor having first and second terminals attached to the first side of the board. The output inductor accommodates the power stage die under the magnetic core so that the power stage die is interposed between the magnetic core and the board. A corresponding method of manufacturing the DC-DC converter assembly and method of manufacturing the output inductor are also disclosed.
-
Citations
21 Claims
-
1. A DC-DC converter assembly, comprising:
-
a board having a first side and a second side opposite the first side; a power stage die of a DC-DC converter attached to the first side of the board; an output inductor electrically connected to an output of the power stage die and disposed over the power stage die on the first side of the board, the output inductor comprising a magnetic core and an electrical conductor having first and second terminals attached to the first side of the board, the output inductor accommodating the power stage die under the magnetic core so that the power stage die is interposed between the magnetic core and the board; a load attached to the first side of the board; a plurality of input capacitors electrically connected to input terminals of the power stage die, the input capacitors that provide a shortest current commutation loop for the power stage die being attached to the first side of the board and the other input capacitors being attached to the second side of the board; an output capacitor electrically connected between the output inductor and the load, and attached to the second side of the board; and a plurality of decoupling capacitors electrically connected to power terminals of the power stage die, and attached to the second side of the board, wherein a total footprint of the power stage die, the output inductor, the plurality of input capacitors, the output capacitor and the plurality of decoupling capacitors is at least a third of the combined surface area of the power stage die, the output inductor, the plurality of input capacitors, the output capacitor and the plurality of decoupling capacitors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 20)
-
-
13. A method of manufacturing a DC-DC converter assembly, the method comprising:
-
attaching a power stage die of a DC-DC converter to a first side of a board, the board further having a second side opposite the first side; positioning an output inductor over the power stage die on the first side of the board, the output inductor comprising a magnetic core and an electrical conductor having first and second terminals, the output inductor accommodating the power stage die under the magnetic core so that the power stage die is interposed between the magnetic core and the board; attaching the first and second terminals of the output inductor to the first side of the board so that the output inductor is electrically connected to an output of the power stage die; attaching a load to the first side of the board; attaching input capacitors that provide a shortest current commutation loop for the power stage die to the first side of the board, the input capacitors being electrically connected to input terminals of the power stage die; attaching additional input capacitors to the second side of the board, the additional input capacitors being electrically connected to the input terminals of the power stage die; attaching an output capacitor to the second side of the board, the output capacitor being electrically connected between the output inductor and the load; and attaching a plurality of decoupling capacitors to the second side of the board, the decoupling capacitors being electrically connected to power terminals of the power stage die, wherein a total footprint of the power stage die, the output inductor, the plurality of input capacitors, the output capacitor and the plurality of decoupling capacitors is at least a third of the combined surface area of the power stage die, the output inductor, the plurality of input capacitors, the output capacitor and the plurality of decoupling capacitors. - View Dependent Claims (14, 15, 16, 17, 18, 19, 21)
-
Specification