Direct-current stabilized power supply device
US9007038B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 2010 |
| Grant date | Apr 14, 2015 |
| Priority date | — |
| Expiry date | Jun 14, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E10/56
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A direct-current stabilized power supply device for stepping down an input voltage from a solar cell, including: a first constant voltage power supply circuit connected to the solar cell and including a constant current limiter circuit; a switch circuit; a switching-type second constant voltage power supply circuit connected to the switch circuit; and a voltage detection circuit that detects the output voltage of the first constant voltage power supply circuit. When the detected output of the first power supply circuit is equal to or higher than a first determination voltage, the switch circuit is closed, and power is supplied to the load from the second power supply circuit, and when the detected voltage is equal to or lower than a second, lower, determination voltage the switch circuit is opened, and the power supplied from the second power supply circuit is stopped.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.