Power control circuit and a switching mode power supply employing this circuit
US4228493A · kind A · utility
48Cited by
9References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1978 |
| Grant date | Oct 14, 1980 |
| Priority date | — |
| Expiry date | Dec 21, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power control circuit for controlling the base current to a switching transistor connected in series with a primary winding of a switching transformer in which a logic circuit controls first and second amplifiers which respectively supply base current to and absorb base current from the switching transistor. The logic circuit blocks base current flow whenever the current flow through the transistor or a secondary winding of the transformer exceeds predetermined values in accordance with timing pulses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.