Switching power supply
US6970367B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 20, 2004 |
| Grant date | Nov 29, 2005 |
| Priority date | — |
| Expiry date | Aug 20, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2201/09063
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A switching power supply device of the invention includes: a switching circuit for interrupting direct current to generate a pulse voltage; a transformer including a primary winding, a secondary winding, and a core for magnetically coupling the primary winding and the secondary winding; a multi-layer wiring board having wiring lines constituting the primary winding and the secondary winding; a rectifier circuit for rectifying an alternating current; a smoothing circuit for suppressing ripple; and a control circuit for controlling an output voltage from the smoothing circuit. The multi-layer wiring board is provided with at least the switching circuit and the rectifier circuit and is arranged on a main wiring board, and the control circuit is arranged on the main wiring board.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.