Buck converter with operating mode automatically determined by the load level
US5617016A · kind A · utility
98Cited by
6References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 20, 1994 |
| Grant date | Apr 1, 1997 |
| Priority date | — |
| Expiry date | Oct 20, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A DC-to-DC (buck) converter comprises a PWM regulation loop and a hysteretic control loop, which are alternatively enabled by a mode selection circuit of the converter in function of the load level. When the level of load drops below a preset limit related to a design load level, the converter passes from a PWM control mode to a hysteretic control mode, thus eliminating switching losses during periods of operation at relatively low load level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.