Multiple voltage switching power supply having output voltage limiting
US4533836A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 12, 1983 |
| Grant date | Aug 6, 1985 |
| Priority date | — |
| Expiry date | Jan 12, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/3376
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A multi-voltage switching power supply having a first pair of switches connected in series with each other across a pair of incoming power lines. The switches are alternately closed at a fifty percent duty cycle. A plurality of pairs of series-connected switches are also connected between the incoming power lines and operated in a pulse-width modulated mode. Power supply circuits are connected between the junction of the pulse-width modulated switches of each pair and the junction of the fifty percent duty cycle switches. The peak value of the current applied to the power supply circuit, which determines the power supply output voltage, is controlled by adjusting the closure time of the pulse-width modulated switches.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.