Magnetic circuit board connector component
View Patent ↗A magnetic component includes a bobbin structure adapted for attachment to a circuit board. The magnetic component may include a magnetically permeable core and a conductive winding. The bobbin structure may include a gap for inserting the edge of a circuit board. Potential applications of the magnetic component include mechanically and electrically interconnecting two or more circuit boards in a substantially side-by-side configuration while providing increased heat dissipation from the magnetic component, improving power density of the electronic device, reducing electronic device profile, allowing magnetic isolation between high-voltage and low-voltage circuits and allowing single-sided and double-sided circuit boards to be used in a single circuit. Also, a circuit board assembly may have two or more circuit boards electrically and mechanically connected by at least one magnetic component.
1. A magnetic component for connecting first and second circuit boards, comprising:
a bobbin structure having a first end and a second end, the bobbin structure defining a reference plane extending longitudinally through the bobbin structure;
a first step extending from the first end of the bobbin structure, the first step including a first circuit board engagement surface oriented substantially facing the reference plane;
a second step extending from the second end of the bobbin structure, the second step including a second circuit board engagement surface oriented substantially facing the reference plane;
a first core positioned on the first end of the bobbin structure;
a second core positioned on the second end of the bobbin structure;
the first circuit board engagement surface defining a first gap between the first step and the first core, the first gap having a first gap height; and
the second circuit board engagement surface defining a second gap between the second step and the second core, the second gap having a second gap height.
2. The magnetic component of claim 1 , wherein the first and second cores each comprise a ferrite.
3. The magnetic component of claim 1 , wherein:
the first circuit board has a first circuit board thickness;
the second circuit board has a second circuit board thickness;
the ratio of the first circuit board thickness to the first gap height is substantially between 0.5 and 1.0; and
the ratio of the second circuit board thickness to the second gap height is substantially between 0.5 and 1.0.
4. The magnetic component of claim 3 , wherein:
the first circuit board thickness is substantially equal to the first gap height; and
the second circuit board thickness is substantially equal to the second gap height.
5. A magnetic component for connecting first and second circuit boards, comprising:
a bobbin structure having a first end and a second end, the bobbin structure defining a reference plane extending longitudinally through the bobbin structure;
a first step extending from the first end of the bobbin structure, the first step including a first circuit board engagement surface oriented substantially facing the reference plane;
a second step extending from the second end of the bobbin structure, the second step including a second circuit board engagement surface oriented substantially facing the reference plane; and
wherein the first step defines a first groove shaped for receiving the first circuit board.
6. The magnetic component of claim 1 , further comprising:
a first conductive terminal extending from the first step; and
a second conductive terminal extending from the second step.
7. The magnetic component of claim 6 , further comprising:
a third conductive terminal extending from the first step; and
a fourth conductive terminal extending from the second step.
8. The magnetic component of claim 6 , further comprising a conductive winding disposed about the winding region of the bobbin structure.
9. The magnetic component of claim 7 , wherein the first conductive terminal is electrically connected to the third conductive terminal.
10. The magnetic component of claim 8 , wherein the first conductive terminal is electrically connected to the conductive winding.
11. A circuit board assembly, comprising:
a first circuit board having a first edge;
a magnetic component connected to the first circuit board, the magnetic component comprising:
a bobbin structure including a first end and a second end,
a core positioned on the bobbin structure,
a conductive winding disposed about the bobbin structure, and
a first step extending from the first end of the bobbin structure, the first step defining a first gap between the core and the first step, the first gap shaped for receiving the first edge of the first circuit board; and
the first edge of the first circuit board positioned in the first gap.
12. The circuit board assembly of claim 11 , further comprising:
the first circuit board including a first electric circuit; and
a first conductive terminal positioned on the bobbin structure, the first conductive terminal electrically connected to the first electric circuit.
13. The circuit board assembly of claim 11 , further comprising:
a second circuit board having a second edge;
a second core positioned on the bobbin structure;
a second step extending from the second end of the bobbin structure, the second step defining a second gap between the second core and the second step, the second gap shaped for receiving the second edge of the second circuit board; and
the second edge of the second circuit board positioned in the second gap.
14. The circuit board assembly of claim 13 , further comprising:
the second circuit board including a second electrical circuit; and
a second conductive terminal positioned on the bobbin structure, the second conductive terminal electrically connected to the second electrical circuit.
15. The circuit board assembly of claim 13 wherein the magnetic component is a transformer.
16. The circuit board assembly of claim 14 , wherein the first circuit is magnetically coupled to the second circuit.
17. The circuit board assembly of claim 16 , wherein the first circuit board is a single-sided printed circuit board and the second circuit board is a double-sided printed circuit board.