Switched mode power supply having improved transient response
US7982447B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2008 |
| Grant date | Jul 19, 2011 |
| Priority date | — |
| Expiry date | Jan 26, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/156
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A switched mode power supply has a high side switching transistor coupled between a voltage source and a load for generating the output voltage at the load. A driver circuit drives the high side switching transistor. A first resistor divider is coupled to the output voltage and has a first tap. An error amplifier has a first input coupled to the first tap and a compensated feedback loop. A second resistor divider is coupled to the output voltage and has a second tap, resistance of the second resistor divider being less than resistance of the first resistor divider. A switch is coupled to the second tap and to the first input of the error amplifier for connecting the second tap to the first input of the error amplifier when the output voltage of the switched mode power supply reaches a first predetermined voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.