Power supply using double latch circuit for automatic input voltage range programming
US8094471B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 2009 |
| Grant date | Jan 10, 2012 |
| Priority date | — |
| Expiry date | Feb 19, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power supply includes a rectifier circuit having a rectifier mode and a voltage doubler mode. An AC switch is coupled to the rectifier circuit and switches the rectifier circuit into the rectifier mode when a higher AC line voltage is supplied and a voltage doubler mode when a lower AC line voltage is supplied. A control circuit is connected to the AC switch and detects the higher or lower AC line voltages and is operable for latching the rectifier circuit in the rectifier mode when the higher AC line voltage is detected and in the voltage doubler mode when the lower AC line voltage is detected. The latch circuit maintains a latched configuration in either the rectifier or voltage doubler mode during voltage transients and in the rectifier mode during start-up transients.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.