Switching mode power supply
US9641060B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 2015 |
| Grant date | May 2, 2017 |
| Priority date | — |
| Expiry date | May 20, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0025
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A switching mode power supply, including a drive circuit, a low-pass filter, a feedback circuit, an operational amplifier, a reference voltage signal generation circuit, a comparator, a pulse width modulation (PWM) signal generation circuit, and a duty cycle detection circuit, where the duty cycle detection circuit is configured to convert a PWM signal that is output by the PWM signal generation circuit or a pulse output voltage signal that is output by the drive circuit into a triangular wave signal, and input the triangular wave signal to a negative input end of the comparator. The present invention is used to avoid using a complex collection circuit to collect a signal from an inductor, thereby reducing complexity of the switching mode power supply, decreasing a current collection time, and improving an operating frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.