Gate drive circuit and gate drive system
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United States of America Patent
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Sep 15, 2020
Grant Date -
Jul 23, 2020
app pub date -
Jan 16, 2020
filing date -
Jan 23, 2019
priority date (Note) -
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status (Latency Note)
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Abstract
Provided is a gate drive circuit and a gate drive system, with which current unevenness among power devices connected in parallel can be reduced more. A gate drive circuit includes: an objective waveform generation unit configured to generate an objective waveform; a drive waveform generation unit configured to generate a drive waveform from the objective waveform, by referring to on-timing set information and off-timing set information; a drive control unit configured to drive the power device to turn the power device on/off, based on the drive waveform; a state detection unit configured to detect the state of the power device; a predicted waveform generation unit configured to generate a predicted waveform of a voltage; and an update unit configured to update the on-timing set information and the off-timing set information, based on the result of the state detection and the result of comparison to the predicted waveform.
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