Switching power supply using controlled negative feedback in series with a switching device and responsive to the voltage and or current to a load
US6917530B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 28, 2002 |
| Grant date | Jul 12, 2005 |
| Priority date | — |
| Expiry date | Feb 2, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0012
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A commercially available power source is rectified by a diode bridge and a capacitor and supplied to a transformer via a terminal. One end of a primary coil is connected to the terminal and the other end is connected to a switching device. One end of a feedback coil is connected to the switching device and the other end is connected to the terminal. A negative feedback circuit is provided between the switching device and the terminal. A rectifying circuit comprising a diode and a capacitor is provided on a secondary coil. A node of the coil and the capacitor is connected to the terminal via a resistor. In detecting circuits, a voltage across the terminal is detected and a current across the resistor is detected. When the detected voltage and current are equal to predetermined values, a control signal is supplied to a feedback circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.