Voltage converter and control method thereof
US8283905B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 2009 |
| Grant date | Oct 9, 2012 |
| Priority date | — |
| Expiry date | Dec 30, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0045
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A voltage converter for converting an input voltage into an output voltage, wherein the output voltage is output to a load, is provided. An inductor is coupled between an output terminal and a node. A transistor is coupled between an input terminal and the node. A pulse width modulation (PWM) controller generates a first control signal according to the output voltage and a first reference voltage. An amplifier generates a second control signal according to the output voltage and a second reference voltage. A detector detects a loading of the load to generate a switching signal. A switching circuit selectively couples one of the PWM controller and the amplifier to the transistor according to the switching signal. The switching circuit controls the transistor according to the second control signal when the amplifier is coupled to the transistor, such that the transistor is operated in a saturation region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.