Method and apparatus for an efficient multiphase switching regulator
US6285571A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 7, 2000 |
| Grant date | Sep 4, 2001 |
| Priority date | — |
| Expiry date | Apr 7, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/1586
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An efficient multiphase switching regulator uses sensed voltages to achieve accurate forced current sharing and programmable current sharing. The voltage waveforms at the input of respective inductors are low-pass filtered to produce sensed voltages which are proportional to the duty cycles of the respective voltage waveforms. The sensed voltages are compared. The comparisons are used to adjust PWM circuits which control the duty cycles of the voltage waveforms of the respective inductors. Substantially identical sensed voltages at the inputs of identical inductors result in substantially identical output currents from respective inductors. The ratio of the output currents from respective inductors can be changed by adjusting a variable resistor that changes the fractions of respective sensed voltages being compared.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.