Multi-path digital power supply controller
US7180439B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 16, 2006 |
| Grant date | Feb 20, 2007 |
| Priority date | — |
| Expiry date | Mar 16, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/529
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A multi-path digital power supply controller includes a first ADC (ADC1) coupled to the supply's output voltage Vout and arranged to provide an output which varies with Vout's low frequency components, and a second ADC (ADC2) coupled to Vout and arranged to provide an output which varies with Vout's high frequency components. A digital reference value is subtracted from the output of ADC1 to produce a low frequency digital error signal, and a summing circuit sums the low frequency digital error signal and the output of ADC2. Processing circuitry is arranged to produce an output which varies with the summed signal and is suitable for coupling to a power stage for use in regulating Vout. Preferably, ADC1 is a low-bandwidth high-resolution ADC and ADC2 is a high-bandwidth low-resolution ADC, both of which are low-cost components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.