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1. (US20040032313) Simplified transformer design for a switching power supply

Office : United States of America
Application Number: 10219114 Application Date: 15.08.2002
Publication Number: 20040032313 Publication Date: 19.02.2004
Grant Number: 6914508 Grant Date: 05.07.2005
Publication Kind : B2
IPC:
H01F 5/00
H01F 27/26
H01F 27/28
H05K 1/14
H05K 1/16
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
F
MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
5
Coils
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
F
MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
27
Details of transformers or inductances, in general
24
Magnetic cores
26
Fastening parts of the core together; Fastening or mounting the core on casing or support
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
F
MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
27
Details of transformers or inductances, in general
28
Coils; Windings; Conductive connections
H ELECTRICITY
05
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
K
PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
1
Printed circuits
02
Details
14
Structural association of two or more printed circuits
H ELECTRICITY
05
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
K
PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
1
Printed circuits
16
incorporating printed electric components, e.g. printed resistor, capacitor, inductor
Applicants: Galaxy Power, Inc.
Inventors: Ferencz Andrew
Zvonar Gregory A.
Schroter Bernhard
Miller Gerald
Ng William
Agents: Cesari and McKenna, LLP
Priority Data: 10219114 15.08.2002 US
Title: (EN) Simplified transformer design for a switching power supply
Abstract: front page image
(EN)

A transformer has a primary winding made from a first conducting trace formed on a first multilayer printed circuit board, and a secondary winding made from a second conducting trace formed on a second multilayer printed circuit board. The primary winding is magnetically coupled to the secondary winding. The windings are etched as traces in copper layers of the PC boards as spirals. The spiral of one copper layer is connected to the spiral of a different copper layer by a via, or vias, formed through the insulating layer of the PC board. The vias are drilled, cleaned, and plated with conducting material, for example copper. By using multiple layers, and by connecting spiral windings of each layer to the windings of the next layer by use of vias, any number of turns can be built into a primary winding, or into a secondary winding.