Small form factor power supply
First Claim
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1. A small form factor power supply capable of providing between about zero and seventy five watts DC, the small form factor power supply comprising:
- a low profile magnetic core for a transformer;
a printed circuit board adapted to have various circuit components mounted thereon, wherein the printed circuit board defines certain wiring patterns including the wiring patterns for primary and secondary coils of the transformer that are magnetically coupled to the core;
a driver circuit coupled to the wiring pattern for the primary coil;
a rectifier circuit formed on the printed circuit board and coupled to the secondary coil to provide a DC power source capable of delivering between zero and seventy five watts of DC power; and
a case enclosing the printed circuit board, the core and the circuit components such that a thickness of the case is less than about 0.436 inches, a length is less than about 5.0 inches, and a width is less than about 2.85 inches, wherein the case reaches a maximum temperature of less than about one hundred forty degrees Fahrenheit when the rectifier circuit delivers seventy five watts DC power.
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Abstract
A new, small form factor power supply is disclosed that provides a regulated DC power supply in a package that radiates relatively little heat and that occupies 2.85×5.0×0.436 inches. The secondary coil of the transformer is positioned at the summing node of the flux of the primary coils and the phase of the drive signals provided to the secondary coils is regulated to control the current and voltage provided by the secondary circuit. Preferably, all circuit components are surface mount devices and the transformer cores are E block planar cores mounted on the printed circuit board.
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Citations
55 Claims
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1. A small form factor power supply capable of providing between about zero and seventy five watts DC, the small form factor power supply comprising:
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a low profile magnetic core for a transformer; a printed circuit board adapted to have various circuit components mounted thereon, wherein the printed circuit board defines certain wiring patterns including the wiring patterns for primary and secondary coils of the transformer that are magnetically coupled to the core; a driver circuit coupled to the wiring pattern for the primary coil; a rectifier circuit formed on the printed circuit board and coupled to the secondary coil to provide a DC power source capable of delivering between zero and seventy five watts of DC power; and a case enclosing the printed circuit board, the core and the circuit components such that a thickness of the case is less than about 0.436 inches, a length is less than about 5.0 inches, and a width is less than about 2.85 inches, wherein the case reaches a maximum temperature of less than about one hundred forty degrees Fahrenheit when the rectifier circuit delivers seventy five watts DC power. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 27, 28, 29, 44, 45, 46)
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14. A small form factor power supply capable of providing between about zero and seventy five watts DC, the small form factor power supply comprising:
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a low profile magnetic core for a transformer; a printed circuit board adapted to have various circuit components mounted thereon, wherein the printed circuit board defines certain wiring patterns including the wiring patterns for primary and secondary coils of the transformer that are magnetically coupled to the core; a driver circuit coupled to the wiring pattern for the primary coil; a rectifier circuit formed on the printed circuit board and coupled to the secondary coil to provide a DC power source capable of delivering between zero and seventy five watts of DC power; and a case enclosing the printed circuit board, the core and the circuit components, wherein the case has a thickness, a length, and a width such that the product of the length and width of the case is less than about fourteen square inches, and wherein the case reaches a maximum temperature of less than about one hundred forty degrees Fahrenheit when the rectifier circuit delivers seventy five watts DC power. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 30, 31, 32, 47, 48, 49)
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33. A small form factor power supply capable of providing between about zero and seventy five watts DC, the small form factor power supply comprising:
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a low profile magnetic core for a transformer; a printed circuit board adapted to have various circuit components mounted thereon, wherein the printed circuit board defines certain wiring patterns including the wiring patterns for primary and secondary coils of the transformer that are magnetically coupled to the core; a driver circuit coupled to the wiring pattern for the primary coil; a rectifier circuit formed on the printed circuit board and coupled to the secondary coil to provide a DC power source capable of delivering between zero and seventy five watts of DC power; at least one heat sink coupled to the various circuit components; and a case including at least one surface and enclosing the printed circuit board, the core and the circuit components and at least one heat sink, wherein at least one surface of the case includes louvers defining openings to improve heat dissipation from the various components and the at least one heat sink enclosed in the case, and wherein the case reaches a maximum temperature of less than about one hundred forty degrees Fahrenheit when the rectifier circuit delivers seventy five watts DC power. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41, 42, 50, 51, 52)
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43. A small form factor power supply capable of providing between about zero and seventy five watts DC, the small form factor power supply comprising:
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a low profile magnetic core for a transformer; a printed circuit board adapted to have various circuit components mounted thereon, wherein the printed circuit board defines certain wiring patterns including the wiring patterns for primary and secondary coils of the transformer that are magnetically coupled to the core; a driver circuit coupled to the wiring pattern for the primary coil; a rectifier circuit formed on the printed circuit board and coupled to the secondary coil to provide a DC power source capable of delivering between zero and seventy five watts of DC power; at least one heat sink coupled to the various circuit components; and a case including at least one surface and enclosing the printed circuit board, the core and the circuit components and at least one heat sink, wherein at least one surface of the case includes louvers defining openings to improve heat dissipation from the various components and the at least one heat sink enclosed in the case, and wherein the at least one heat sink covers the openings defined by the louvers on the at least one surface of the case to resist penetration of liquids into the case. - View Dependent Claims (53, 54, 55)
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Specification