Control circuit for measuring and regulating output current of CCM power converter
US7663352B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 27, 2007 |
| Grant date | Feb 16, 2010 |
| Priority date | — |
| Expiry date | Jun 20, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/33507
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A switching control circuit is provided for measuring and regulating an output current of a power converter. The power converter is operated under continuous current mode. A detection circuit generates a continuous-current signal and a peak-current signal by detecting a switching current of an inductive device. An integration circuit generates an average-current signal in response to the continuous-current signal, the peak-current signal and an off time of a switching signal. The switching control circuit generates the switching signal in response to the average-current signal. The switching signal is coupled to switch the inductive device and regulate the output current of the power converter. A time constant of the integration circuit is correlated to the switching period of the switching signal, therefore the average-current signal will be proportional to the output current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.