Driver circuit for semiconductor switching device
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorAkihisa Yamamoto
Life of this patent
Estimating the term…
Abstract
A gate sink circuit includes a comparator for monitoring a gate voltage of a switching device in comparison with a predetermined threshold value; a sink switching device connected between the gate of the switching device and a ground line; an inverter for inverting an output of the comparator; another inverter for inverting an input signal for the switching device; an AND circuit for operating the logic product of each output from the inverters; and an RS flip-flop FF provided with the output of the AND circuit as a set signal and the input signal as a reset signal, thereby securely keeping an off-state of the switching device and greatly reducing flow-through current in turn-on.
Claims2
A driver circuit for semiconductor switching device, comprising:
- a gate drive circuit for driving the gate of a semiconductor switching device in response to an input signal;
- a comparator circuit for comparing a gate voltage of the semiconductor switching device with a predetermined threshold valve;
- a memory circuit configured to be set in response to inversion of an output of the comparator circuit and reset in response to of the input signal;
- and
- a gate sink device for stabilizing the gate voltage of the semiconductor switching device when the memory circuit is set.
Dependencies are inferred from the claim text.