Power supply start up circuit
US6804126B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 15, 2003 |
| Grant date | Oct 12, 2004 |
| Priority date | — |
| Expiry date | Jan 15, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0006
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit provides a secondary output voltage from an input voltage. The circuit includes power supply circuitry for creating an unregulated DC bus voltage line and a regulator circuit connected to the DC bus voltage line for controlling a first switch in series with a transformer winding. The control circuit samples an output voltage to control the output voltage by cycling the first switch. The circuit further includes a pulse generator circuit connected to the regulator circuit for controlling start and stop cycles of the regulator circuit and a comparator circuit connected to the pulse generator circuit for monitoring the secondary output voltage and for disabling the pulse generator circuit during normal operation of the power supply circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.