Power supply unit and calibration method to improve reliability
US9923479B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Apr 25, 2017 |
| Grant date | Mar 20, 2018 |
| Priority date | — |
| Expiry date | Apr 25, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power supply includes a boost converter, a capacitor, a step-down converter and a control unit. The boost converter, when activated, converts an input voltage into a boost voltage. The capacitor has a bulk voltage which is equal to the boost voltage when the boost converter is activated. The step-down converter converts the boost voltage into a step-down voltage for output. While the boost converter is deactivated, the control unit samples the input voltage and the bulk voltage, calculates an estimated value, and determines a calibration parameter. While the boost converter is activated, the control unit calculates a calibration value for enabling the boost converter to convert the input voltage with reference to the calibration value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.