Driver circuit
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United States of America Patent
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-
Dec 28, 2010
Issued Date -
N/A
app pub date -
Dec 8, 2008
filing date -
Dec 6, 2007
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A driver circuit facilitates reducing noises and losses and improving the driving performances thereof without connecting a series circuit of capacitor and a resistor to the gate of IGBT. The driver circuit includes a slope setting circuit that sets the gate voltage waveform of IGBT; and an operational amplifier that includes a non-inverting input terminal, to which an output voltage V* from slope setting circuit is inputted, and an inverting input terminal, to which a divided voltage Vgsf divided by resistors is inputted; and the operational amplifier outputs an output voltage Vout, proportional to the difference between the output voltage V* and the divided voltage Vgsf, to the gate of IGBT.
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