Method for starting up a switched-mode power supply, and switched-mode power supply having a starting circuit
US6757183B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 2002 |
| Grant date | Jun 29, 2004 |
| Priority date | — |
| Expiry date | Jul 22, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/36
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
To start a switching power supply in an energy saving manner, the method and device according to the invention transmits the energy that is collected by the Y-capacitors through a diode to a capacitor that is located on the secondary side. Once the voltage in the capacitor reaches a first predefinable minimum value, the voltage is applied to an impulse generator as an input voltage and the generator starts the switching power supply. Once the voltage in an additional capacitor on the secondary side reaches a second predefinable minimum value, the voltage in the capacitor is also applied as an input voltage to a control unit, preferably, a microprocessor, that controls the impulse generator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.