Switching converter systems with isolating digital feedback loops
US8451628B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 1, 2010 |
| Grant date | May 28, 2013 |
| Priority date | — |
| Expiry date | Aug 3, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/33546
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Switching converter systems are provided to control output voltage across a load by means of a converter forward path and a converter feedback path. The forward path preferably includes a transistor, an inductive element, a diode and a capacitor arranged to switchably exchange energy with the capacitor to thereby generate the output voltage. The feedback path preferably extends from the capacitor and is configured to digitally control a duty cycle of the transistor in response to the output voltage. In a system embodiment, the feedback path includes at least one comparator arranged to provide a digital error signal in response to a comparison of the output voltage to a reference voltage; a first isolation channel configured to isolatably transport a clock signal to digitally gate the error signal; a second isolation channel configured to isolatably transport the error signal; and a controller coupled to the first and second isolation channels and configured to control the duty cycle in response to the error signal. A transformer is preferably inserted into the first and second isolation channels to enhance isolation and, preferably, the first and second isolation channels respectiv…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.