Constant on-time switching converter with reference voltage adjusting circuit and controller thereof
US9923463B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 7, 2016 |
| Grant date | Mar 20, 2018 |
| Priority date | — |
| Expiry date | Sep 7, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0025
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A COT switching converter includes a switching circuit having a main switch, an on-time control circuit configured to generate an on-time control signal, a comparing circuit, a logic circuit and a reference voltage adjusting circuit. The comparing circuit compares a reference voltage with a feedback signal indicative of output voltage of the switching circuit to generate a comparison signal. Based on the on-time control signal and the comparison signal, the logic circuit generates a control signal of the main switch. The reference voltage adjusting circuit generates the reference voltage based on a basic reference voltage and the control signal, in each switching cycle of the switching converter, the reference voltage is pulled down when the main switch is turned ON and increases with a slew rate until the main switch is turned ON again in the next switching cycle or the reference voltage increases to a maximum value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.