Constant on-time architecture for switching regulators
US5747976A · kind A · utility
72Cited by
1References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 26, 1996 |
| Grant date | May 5, 1998 |
| Priority date | — |
| Expiry date | Mar 26, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/156
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A switching voltage regulator whose switching frequency decreases with reduced load currents is disclosed. The switching voltage regulator includes a current-controlled oscillator that varies the frequency of switching by changing the off-time of the switch and maintaining a constant on-time. The lower frequency as a result of the constant on-time switching reduces switching loss and power consumption at lower load currents. The constant on-time architecture of the present invention significantly improves the overall efficiency of the switching voltage regulator, while reducing component count and die size.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.