Headroom compensation circuit for voltage converter
US7960957B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 2007 |
| Grant date | Jun 14, 2011 |
| Priority date | — |
| Expiry date | Aug 26, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/157
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A headroom compensation circuit for a voltage converter for ensuring that there is adequate headroom voltage to enable accurate operation of the current sense amplifier sensing the output current of the converter, the headroom compensation circuit comprising an error amplifier for comparing an output voltage of the converter to a reference voltage to set the converter output voltage; and a circuit for providing a bias current to an input of the error amplifier when a supply voltage to the current sense amplifier within a predefined threshold of the converter output voltage to cause the error amplifier to reduce the converter output voltage thereby to increase the headroom voltage for the current sense amplifier, said headroom voltage being defined as a voltage between the supply voltage to the current sense amplifier and said converter output voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.