DC-DC converter with temperature compensation circuit
US7859511B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 9, 2007 |
| Grant date | Dec 28, 2010 |
| Priority date | — |
| Expiry date | Aug 29, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/02
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A DC-DC converter includes a temperature compensation circuit arranged between a feedback differential amplification circuit and an output voltage detection circuit to compensate the variation of the voltage level of the DC output voltage of the converter caused by ambient temperature changes. The temperature compensation circuit includes a temperature detection circuit that detects the ambient temperature and, in response thereto, generates a temperature signal; and a current source circuit that is connected between a feedback signal input terminal of the feedback differential amplification circuit and the output voltage detection circuit. The current source circuit, based on the temperature signal, generates an electrical current and a compensation voltage proportional to the electrical current. The compensation voltage is applied to the DC output voltage to thereby regulate the voltage level of the DC output voltage. The temperature signal is a temperature signal of positive temperature characteristics and/or a temperature signal of negative temperature characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.