Power supply circuit having switched capacitor units
US8773087B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 2008 |
| Grant date | Jul 8, 2014 |
| Priority date | — |
| Expiry date | Oct 20, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/392
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention relates to a power supply circuit (10) and methods for supplying electrical power to at least one load output. The circuit comprises a main power supply unit (12) with a voltage input (14), a main switching element (26) and a reactive element (28). The switching element (26) is controllable to deliver an output voltage or current (I out). Output units (20a, 20b, 20c) with load outputs are connected to a main power supply unit (12). In order to drive loads connected to the load outputs, e.g. LEDs, OLEDs or laser diodes, with exact pulses, each output unit (20a, 20b, 20c) has a load switching element (38) to connect or disconnect the main power supply unit (12) to or from the load output. There are further provided switched capacitor units (34), each with a capacitor (C) and a capacitor switching element (40). The capacitor units may be operated such that the capacitors remain essentially charged at different voltage levels. According to a second aspect of the invention, each output unit (20a, 20b, 20c) has a switched capacitor unit (34) with a capacitor (C) and a capacitor switching element (40) connected to the load output. The load switching element (38) and the capa…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.