Gate driving scheme for depletion mode devices in buck converters
US7839131B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 2008 |
| Grant date | Nov 23, 2010 |
| Priority date | — |
| Expiry date | May 22, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit comprising a gate driver including first and second switching stages for driving respective sync and control switches, at least one of which is a normally ON depletion mode device, and another circuit connected to the first and second switching stages and including first and second circuits. The first circuit is coupled to the first switching stage and to the sync switch, the first switching stage having a first state wherein the sync switch is on, and a second state wherein a first bias voltage is switched to the gate of the sync switch to turn it off. The second circuit has a first state wherein the control switch is on when the sync switch is off, and a second state wherein the control switch is switched off when the sync switch is on by switching a second bias voltage to the gate of the control switch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.