High voltage step down DC converter
US6166925A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 6, 1999 |
| Grant date | Dec 26, 2000 |
| Priority date | — |
| Expiry date | Aug 6, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/1563
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A DC converter for stepping down DC voltage having two input terminals (E1, E2) to be connected to an input DC voltage source with a high voltage level; two output terminals (A1, A2) for taking a regulated low output DC voltage; a coil (TS) having a center tap (MA) and connected at one end (TA1) with a first one (E1) of the input terminals via an electronic switch device (MOS) and at the other end (TA2) with the second input terminal (E2) via a first capacitor (C1); the charging voltage of the first capacitor (C1) forming the output DC voltage; a second capacitor (C6) connected at one end with a node located between switching device (MOS) and coil (TS) and at the other end with the center tap (MA) via a first diode (D2); a control device (EV, PWM for comparing the charging voltage of the second capacitor (C6) with a reference voltage (REF) and rendering the switch device (MOS) conductive and non-conductive with a pulse-frequency modulated and/or pulse-width modulated switching pulse sequence depending on the result of comparison; and a second diode (D1) connected between the center tap (MA) and the second input terminal (E2); the two diodes (D1, D2) being poled to conduct current t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.