POWER STAGE COOLED TRANSFORMER WITH VERTICAL OFFSET
One or more structures and/or methods are provided. According to some embodiments, a transformer includes a substrate, a first winding having a first foot connected to the substrate, a first leg extending vertically from the first foot, a second foot connected to the substrate, a second leg extending vertically from the second foot, and a third leg extending parallel to the substrate to connect the first leg and the second leg, a second winding having a third foot connected to the substrate, a fourth leg extending vertically from the third foot, a fifth leg connected to the third leg and extending parallel to the substrate to at least partially overlap the third leg, a sixth leg extending vertically from the fifth leg away from the substrate, and a pad connected to the fourth leg, and a core enclosing at least a portion of the third leg and the fifth leg.
1 . A transformer, comprising:
a substrate;
a first winding comprising:
a first foot connected to the substrate;
a first leg extending vertically from the first foot;
a second foot connected to the substrate;
a second leg extending vertically from the second foot; and
a third leg extending parallel to the substrate to connect the first leg and the second leg;
a second winding comprising:
a third foot connected to the substrate;
a fourth leg extending vertically from the third foot;
a fifth leg connected to the third leg and extending parallel to the substrate to at least partially overlap the third leg;
a sixth leg extending vertically from the fifth leg away from the substrate; and
a pad connected to the fourth leg; and
a core enclosing at least a portion of the third leg and the fifth leg.
2 . The transformer of claim 1 , wherein:
the first leg, the second leg and the third leg define a box shape; and
the fourth leg, the fifth leg and the sixth leg define a square sigmoid shape.
3 . The transformer of claim 1 , wherein:
the substrate comprises a circuit board.
4 . The transformer of claim 1 , wherein:
a first distance between a bottom surface of the core and a bottom surface of the third leg is different than a second distance between a top surface of the core and a top surface of the fifth leg.
5 . The transformer of claim 1 , wherein the first winding comprises:
a fourth foot connected to the substrate and positioned between the first foot and the second foot; and
a seventh leg extending vertically from the fourth foot and connected to the third leg.
6 . The transformer of claim 5 , wherein the first winding comprises:
a fifth foot connected to the substrate and positioned between the fourth foot and the second foot; and
an eighth leg extending vertically from the fifth foot and connected to the third leg.
7 . The transformer of claim 1 , comprising:
a third winding comprising:
a fourth foot connected to the substrate;
a seventh leg extending vertically from the fourth foot;
a fifth foot connected to the substrate;
an eighth leg extending vertically from the second foot;
a ninth leg extending parallel to the substrate to connect the seventh leg and the eighth leg; and
a tenth leg connecting the fourth foot to the first foot.
8 . A voltage regulator, comprising:
a supply voltage terminal;
a first circuit board;
a first transformer comprising:
a first secondary winding connected to the first circuit board;
a first primary winding comprising:
a first foot connected to the first circuit board;
a first serpentine body connected to the first foot and at least partially overlapping the first secondary winding; and
a first contact pad connected to the first serpentine body and vertically offset from a top surface of the first secondary
winding in a direction away from the first circuit board;
a second transformer comprising:
a second secondary winding connected to the first circuit board;
a second primary winding comprising:
a second foot connected to the first circuit board;
a second serpentine body connected to the second foot and at least partially overlapping the second secondary winding; and
a second contact pad connected to the second serpentine body and vertically offset from a top surface of the second secondary winding in a direction away from the first circuit board;
a second circuit board contacting the first contact pad and the second contact pad;
an interconnect connecting the first secondary winding and the second secondary winding in series;
an output terminal connected to the first primary winding and the second primary winding; and
a power stage electronics package connected to the second circuit board and comprising:
a first switch connected between the supply voltage terminal and the first primary winding; and
a second switch connected between the supply voltage terminal and the second primary winding.
9 . The voltage regulator of claim 8 , wherein:
the power stage electronics package is connected to a first side of the second circuit board and the first contact pad and the second contact pad contact a second side of the circuit board opposite the first side.
10 . The voltage regulator of claim 8 , comprising:
an input capacitor mounted to the second circuit board and connected to the supply voltage terminal; and
an output capacitor mounted to the first circuit board and connected to the output terminal.
11 . The voltage regulator of claim 8 , comprising:
a core enclosing at least a portion of the first primary winding, the first secondary winding, the second primary winding, and the second secondary winding.
12 . The voltage regulator of claim 8 , comprising:
a first core enclosing at least a portion of the first primary winding and the first secondary winding; and
a second core enclosing at least a portion of the second primary winding and the second secondary winding.
13 . The voltage regulator of claim 8 , wherein:
the interconnect comprises an interconnect leg above the first circuit board and directly connecting the first secondary winding and the second secondary winding.
14 . The voltage regulator of claim 8 , wherein:
the first secondary winding comprises:
a first foot connected to the first circuit board;
a first leg extending vertically from the first foot;
a second foot connected to the first circuit board;
a second leg extending vertically from the second foot; and
a third leg extending parallel to the first circuit board to connect
the first leg and the second leg.
15 . The voltage regulator of claim 8 , wherein:
the first secondary winding is connected to a first edge plate of the first circuit board; and
the second secondary winding is connected to a second edge plate of the first circuit board.
16 . The voltage regulator of claim 8 , wherein:
the power stage electronics package is inlaid in the second circuit board.
17 . A method, comprising:
connecting a first winding to a first circuit board, the first winding comprising:
a first foot connected to the first circuit board;
a first leg extending vertically from the first foot;
a second foot connected to the first circuit board;
a second leg extending vertically from the second foot; and
a third leg connecting the first leg and the second leg;
connecting a second winding to the first circuit board, the second winding comprising:
a third foot connected to the first circuit board;
a fourth leg extending vertically from the third foot;
a fifth leg connected to the third leg and extending parallel to the first circuit board to at least partially overlap the third leg;
a sixth leg extending vertically from the fifth leg away from the first circuit board; and
a pad connected to the fourth leg;
connecting a second circuit board to the pad; and
connecting a die comprising a power stage electronics package to the second circuit board.
18 . The method of claim 17 , comprising:
connecting a third circuit board between the first circuit board and the second circuit board.
19 . The method of claim 17 , comprising:
connecting at least one of the first foot or the second foot to an edge plate of the first circuit board.
20 . The method of claim 17 , comprising enabling a connection in the first circuit board to one of the first foot or the third foot.