Peak voltage clamping circuit for high frequency boost converter and method of operation thereof
US5943200A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 6, 1998 |
| Grant date | Aug 24, 1999 |
| Priority date | — |
| Expiry date | Jan 6, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/155
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
For use in a boost converter having a main boost switch, a boost inductor, a boost diode coupled to the boost inductor and the main boost switch and a resonant, passive snubber coupled to the boost inductor and the main boost switch that limits reverse recovery currents in the boost diode during a turn-on of the main boost switch, a peak voltage clamping circuit for, and method of, reducing voltage stress on the main boost switch caused by operation of the snubber. In one embodiment, the circuit includes a blocking switch and a zener diode, coupled in series between the main boost switch and the boost diode, that cooperate to provide a conductive path from the main boost switch to an output of the boost converter for electrical currents that exceed a predetermined peak voltage value thereby to reduce the voltage stress on the main boost switch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.