Pulse-width modulation current control with reduced transient time
US8154222B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 23, 2008 |
| Grant date | Apr 10, 2012 |
| Priority date | — |
| Expiry date | Jan 4, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
One embodiment of the present invention includes a current regulator circuit. The circuit includes at least one switch configured to periodically couple and decouple a respective at least one voltage rail to an inductor to maintain a current through the inductor. The circuit also includes a pulse-width modulation (PWM) controller configured to set a duty-cycle associated with a switching signal to control the at least one switch based on a feedback signal that is associated with a magnitude of the current. The circuit also includes a switch-controlled current path configured to shunt the current from a load in response to a control signal. The circuit further includes an error circuit configured to provide an error term to the PWM controller upon activating the control signal to adjust the duty-cycle substantially instantaneously in response to the control signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.