Switching regulator device and method with adaptive frequency foldback
US8723501B2 · kind B2 · utility
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1References
17Claims
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Assignee
Inventor
Key dates
| Filing date | Sep 5, 2012 |
| Grant date | May 13, 2014 |
| Priority date | — |
| Expiry date | Sep 5, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K5/08
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A control circuit for a switching regulator includes a clock circuit, a pulsewidth modulation (PWM) circuit, and a reduction monitor. The clock circuit provides a clock signal at a variable frequency. The PWM circuit produces a drive signal of at least a first predetermined duration once every period of the clock signal. The reduction monitor controls the clock circuit to reduce the variable frequency in response to a sense signal that indicates that at least one of a voltage and a current is outside a limit during the first predetermined duration of said drive signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.