Circuit arrangement for providing a voltage supply for a transistor driver circuit
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United States of America Patent
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May 17, 2011
Grant Date -
Jun 25, 2009
app pub date -
Dec 15, 2008
filing date -
Dec 21, 2007
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The invention relates to a circuit arrangement for providing a voltage supply for a driver circuit for driving a semiconductor switch. The circuit arrangement has: a first bootstrap circuit which is supplied with a first auxiliary voltage referring to a lower supply potential, the bootstrap circuit comprising a first capacitor which provides a supply voltage for the driver circuit; a first charge pump which is designed to keep the charge in the first capacitor at or above a particular level at least during a particular period of time; a second bootstrap circuit which is supplied with a second auxiliary voltage referring to an upper supply potential, the bootstrap circuit comprising a second capacitor which provides a supply voltage for the first charge pump; and a second charge pump which is designed to generate the second auxiliary voltage.
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