Feed forward current mode switching regulator with improved transient response
US10013003B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 11, 2013 |
| Grant date | Jul 3, 2018 |
| Priority date | — |
| Expiry date | Sep 1, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0025
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A switching regulator circuit incorporates an offset circuit, connected in a control loop of the regulator circuit, that, in response to a signal indicating an imminent load current step, adjusts a duty cycle of a power switch for the current step prior to the regulator circuit responding to a change in output voltage due to the current step. In one embodiment, a load controller issues a digital signal shortly before a load current step. The digital signal is decoded and converted to an analog offset signal in a feedback control loop of the regulator to immediately adjust a duty cycle of the switch irrespective of the output voltage level. By proper timing of the offset, output voltage ripple is greatly reduced. The current offset may also be used to rapidly change the output voltage in response to an external signal requesting a voltage step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.