Fixed-frequency current mode converter and control method thereof
US7230406B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 25, 2005 |
| Grant date | Jun 12, 2007 |
| Priority date | — |
| Expiry date | Aug 25, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/1584
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A fixed-frequency current mode converter comprises a power stage to produce an inductor current and an output voltage, an error amplifier to generate an error signal from the difference between the output voltage and a reference voltage varied with the inductor current, a comparator to compare the error signal with a ramp signal varied with the inductor current to generate a comparison signal, and a PWM generator to generate a PWM signal in response to a fixed-frequency clock and the comparison signal to drive the power stage. A second comparator is further comprised to compare the error signal with a second reference voltage varied with the inductor current, and generates a second comparison signal to reset the clock when the error signal is lower than the second reference voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.