SMPS power-on with energy saver
US10447145B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 2018 |
| Grant date | Oct 15, 2019 |
| Priority date | — |
| Expiry date | Nov 19, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In an embodiment, a method for soft-starting an SMPS includes: asserting an enable signal; disabling an output stage of the SMPS; after asserting the enable signal, measuring a feedback voltage of the SMPS; receiving a first reference voltage at an input reference node; comparing the measured feedback voltage with the first reference voltage; and, when the measured feedback voltage is lower than the first reference voltage, storing the feedback voltage in a soft-start capacitor, connecting an output reference node to the soft-start capacitor, enabling the output stage of the SMPS, and switching a transistor of the output stage to regulate the output voltage based on the feedback voltage and a second reference voltage at the output reference node, and injecting a current into the soft-start capacitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.