Converter and an Electronic Equipment Provided with such a Converter
First Claim
1. A converter for converting AC to DC or DC to DC comprisinga first transformer (10, 10′
- , 10″
) having a secondary winding (11) connected to a DC-load side (17) of the converter,semiconductor switches (4, 5) connected to a primary winding (9) of said transformer,a drive circuit (8) configured to control said semiconductor switches to switch so as to deliver a voltage to said primary winding with a frequency exceeding 1 MHz, andelectronic components (3, P), such as diodes, resistors, capacitors and integrated circuits, said drive circuit comprising a second transformer (12, 12a, 12b) for voltage level shifting of said semiconductor switches with respect to a logic drive circuit unit (13, 13′
, 13″
) of said drive circuit, whereinthe primary winding (9) and the secondary winding (11) of the first transformer (10, 10′
, 10″
) are each in the form of at least one layer (40-42) of turns inside or at the surface of a first printed circuit board (30), in which each of said at least two layers has at least one elongated winding element substantially following an elongated winding element (43-45) of the other layer while being in an overlapping relationship therewith as seen perpendicularly to said printed circuit board over substantially the entire extension of said winding elements, that also said second transformer (12, 12a, 12b) is arranged inside or at the surface of said first printed circuit board, that the converter also comprises a second printed circuit board (31) and a ferrite (32) layer sandwiched between and separating said second printed circuit board from said first printed circuit board, and that the electronic components (3, P) of the converter including said semiconductor switches (4, 5) are arranged inside or at the surface of said second printed circuit board (31).
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Accused Products
Abstract
A converter for converting AC to DC or DC to DC comprises a first transformer (10) having a secondary winding connected to a DC-load side of the converter, semiconductor switches connected to a primary winding of the transformer, a drive circuit configured to control the semiconductor switches to switch so as to deliver a voltage to the primary winding with a frequency exceeding 1 MHz and electronic components. The drive circuit comprises a second transformer (12) for voltage level shifting of said semiconductor switches with respect to a logic drive circuit unit of said drive circuit. The transformers are arranged inside or at the surface of a first printed circuit board (30), and the electronic components of the converter including said semiconductor switches are arranged inside or at the surface of a second printed circuit board (31). The two circuit boards are separated by a shielding ferrite layer (32) sandwiched therebetween.
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Citations
20 Claims
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1. A converter for converting AC to DC or DC to DC comprising
a first transformer (10, 10′ - , 10″
) having a secondary winding (11) connected to a DC-load side (17) of the converter,semiconductor switches (4, 5) connected to a primary winding (9) of said transformer, a drive circuit (8) configured to control said semiconductor switches to switch so as to deliver a voltage to said primary winding with a frequency exceeding 1 MHz, and electronic components (3, P), such as diodes, resistors, capacitors and integrated circuits, said drive circuit comprising a second transformer (12, 12a, 12b) for voltage level shifting of said semiconductor switches with respect to a logic drive circuit unit (13, 13′
, 13″
) of said drive circuit, whereinthe primary winding (9) and the secondary winding (11) of the first transformer (10, 10′
, 10″
) are each in the form of at least one layer (40-42) of turns inside or at the surface of a first printed circuit board (30), in which each of said at least two layers has at least one elongated winding element substantially following an elongated winding element (43-45) of the other layer while being in an overlapping relationship therewith as seen perpendicularly to said printed circuit board over substantially the entire extension of said winding elements, that also said second transformer (12, 12a, 12b) is arranged inside or at the surface of said first printed circuit board, that the converter also comprises a second printed circuit board (31) and a ferrite (32) layer sandwiched between and separating said second printed circuit board from said first printed circuit board, and that the electronic components (3, P) of the converter including said semiconductor switches (4, 5) are arranged inside or at the surface of said second printed circuit board (31). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
- , 10″
Specification