Low voltage power supply
US8183845B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 24, 2008 |
| Grant date | May 22, 2012 |
| Priority date | — |
| Expiry date | Oct 19, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A buck regulator for converting an input DC voltage, V+, into an output DC voltage level includes a coupled inductor for outputting the DC voltage level, and an error amplifier for sensing an error in the outputted DC voltage level and a pulse width modulator (PWM) providing a pulse waveform having a duty cycle responsive to the error. Also, included are a V+ voltage driver for outputting the V+ voltage level responsive to the pulse waveform, and a super voltage driver for outputting a super voltage level, Vss, responsive to the pulsed waveform, wherein the super voltage level is higher than the V+ voltage level. The outputted super voltage level is complementary to the outputted V+ voltage level. Also included are dual MOSFETs, which have gates for, respectively, receiving the super voltage level and the V+ voltage level. The dual MOSFETs drive the coupled inductor for outputting the DC voltage level. Furthermore, a pulse shaper is coupled between the PWM and the voltage drivers for forming a sharp pulse having a rise time that is faster than a rise time of the pulse waveform. The sharp pulse is provided as a control signal for activating the voltage drivers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.