Claims
- 1. A voltage converter, comprising:a pair of input terminals for receiving an input voltage; a series circuit connected between said pair of input terminals and having: a first switch; and a low-pass filter having output terminals to be connected to a load; a freewheeling circuit connected in parallel with said low-pass filter, said freewheeling circuit having a second switch, said second switch having: a first load path terminal; a second load path terminal; a load path formed between said second load path terminal and said first load path terminal; and a control terminal; and said second switch being a MOS transistor having one of: a floating body zone; and a source zone, a non-reactive resistor, and a body zone connected to said source zone through said non-reactive resistor.
- 2. The voltage converter according to claim 1, including a rectifier element connected between said first load path terminal and said control terminal of said second switch.
- 3. The voltage converter according to claim 1, wherein said floating body zone is a body zone not connected to a defined potential.
- 4. The voltage converter according to claim 1, including a Schottky diode connected in parallel with said load path of said second switch.
- 5. The voltage converter according to claim 1, wherein:said low-pass filter has a series circuit with: a coil; and a capacitor; and said capacitor is connected in parallel with said output terminals.
- 6. The voltage converter according to claim 1, wherein said first switch is a transistor.
- 7. The voltage converter according to claim 1, wherein said first switch is a field-effect transistor.
- 8. The voltage converter according to claim 1, including a drive circuit having an output terminal connected to said first switch for driving said first switch.
- 9. The voltage converter according to claim 8, wherein said drive circuit drives said first switch dependent upon one of:an output voltage tapped off at said output terminals; and a current through said coil of said low-pass filter.
- 10. The voltage converter according to claim 1, including a drive circuit connected to said control terminal of said second switch and driving said second switch dependent upon a switching state of said first switch.
- 11. The voltage converter according to claim 1, including a drive circuit for both of said first and second switches.
- 12. The voltage converter according to claim 11, wherein said drive circuit prevents said first switch and said second switch from both being in an on state simultaneously.
- 13. The voltage converter according to claim 1, including a drive circuit connected to said first switch and said second switch.
- 14. The voltage converter according to claim 13, wherein said drive circuit prevents said first switch and said second switch from both being in an on state simultaneously.
- 15. The voltage converter according to claim 1, wherein said second switch is a MOSFET having:a body zone; and a recombination zone formed in said body zone.
Priority Claims (1)
Number |
Date |
Country |
Kind |
PCT/DE00/01154 |
Apr 2000 |
DE |
|
CROSS-REFERENCE TO RELATED APPLICATION
This application is a continuation of copending International Application No. PCT/EP01/04123, filed Apr. 10, 2001, which designated the United States and was not published in English.
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Continuations (1)
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Number |
Date |
Country |
Parent |
PCT/EP01/04123 |
Apr 2001 |
US |
Child |
10/272343 |
|
US |