Discontinuous conduction mode control circuit and method for synchronous converter
US7911193B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 2008 |
| Grant date | Mar 22, 2011 |
| Priority date | — |
| Expiry date | Aug 15, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/3376
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a circuit, a high side driver control circuit outputs gating signals to a high side driver of a synchronous converter responsive to a pulse width modulated input signal. A synchronous rectifier driver circuit outputs a gating signal to a synchronous rectifier of the synchronous converter responsive to the pulse width modulated input signal. An inhibit circuit inhibits the gating signal to the synchronous rectifier upon detection of a zero crossing condition. A circuit detects the zero crossing condition respective to comparing a measured value to a nominal value adjusted by a delta value. A duty cycle observer circuit determines the average duty cycle of the pulse width modulated input signal and varies the reference value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.