Control circuit for synchronous rectifiers in DC/DC converters to reduce body diode conduction losses
US6870747B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 13, 2003 |
| Grant date | Mar 22, 2005 |
| Priority date | — |
| Expiry date | Feb 13, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A controller for a switching power supply having first and second synchronous rectifiers that minimizes the reverse recovery time and body diode conduction losses of each of the synchronous rectifiers. The controller includes a first controller that predicts the optimal turn-on and turn-off time of the first synchronous rectifier as a function of voltage measurements of the previous switching cycle and the timing of the pulse width modulator signal in the current switching cycle. The controller also includes a second controller that predicts the optimal turn-on and turn-off time of the second synchronous rectifier as a function of voltage measurements of the previous switching cycle and the timing of the pulse width modulator signal in the current switching cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.