Buck DC-DC converter with dual feedback control
US8593125B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 22, 2012 |
| Grant date | Nov 26, 2013 |
| Priority date | — |
| Expiry date | Oct 22, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/1566
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A buck switching regulator includes a feedback control circuit including a first gain circuit configured to generate a first feedback signal indicative of the regulated output voltage; a ripple generation circuit configured to generate a ripple signal using the switching output voltage and to inject the ripple signal to the first feedback signal; a second gain circuit configured to generate a second feedback signal indicative of the regulated output voltage; an operational transconductance amplifier (OTA) configured to generate an output signal having a magnitude indicative the difference between the second feedback signal and the first reference signal; and a comparator configured to generate a comparator output signal having an output level indicative of the difference between the output signal of the OTA and the first feedback signal. As thus configured, the buck switching regulator generates an output voltage with increased accuracy and fast transient response.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.