Gate driver circuit of power transistor, and motor driver circuit
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United States of America Patent
Stats
-
Jul 14, 2020
Grant Date -
Aug 8, 2019
app pub date -
Feb 4, 2019
filing date -
Feb 6, 2018
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Gate driver circuit for driving power transistor includes: gate line to be connected to the transistor; source line to be connected to the transistor; first current source sourcing current to the gate line; and second current source sinking current from the gate line, wherein the first current source includes: first reference impedance element connected to power supply line; first reference transistor installed between the first reference impedance element and the gate line; first error amplifier having output connected to gate of the first reference transistor, one input connected to the first reference impedance element, and the other input where first reference voltage is input; and first transistor elements installed between the power supply line and the gate line, and wherein the first current source is switched between a state, in which gate of each first transistor element is connected to the output of the first error amplifier, and OFF state.
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