Controller of switching power supply apparatus
US11411498B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 27, 2020 |
| Grant date | Aug 9, 2022 |
| Priority date | — |
| Expiry date | Jul 11, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A controller of a current resonance switching power supply apparatus configured to supply a constant output voltage to a load. The current resonance switching power supply apparatus includes a resonance circuit, and generates a feedback signal indicative of an error between the output voltage and a target voltage. The controller includes a load current detection circuit that receives a part of a resonance current of the resonance circuit, performs averaging and outputs a load current signal, and a standby detection circuit that receives the feedback signal and the load current signal, and determines that the load is in a standby mode upon detecting that the load current signal is lower than a first threshold and the feedback signal is lower than a second threshold, and is in a normal mode upon detecting that the feedback signal continues to be higher than the second threshold for more than a predetermined time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.