Semiconductor element drive device
AssigneeMitsubishi Electric Corporation
InventorsYuto SHIBUTA, Shohei HIGASHI
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Abstract
An object is to provide a technique which enables an outer portion to identify a type of an error state from an identification signal in an early state. A semiconductor element drive device includes a plurality of error state detection circuits generating an error signal corresponding to an error state, an error state identification signal generation circuit generating an error state identification signal having a different waveform for each type of the error state and having a pulse width smaller than each error signal based on the plurality of error signals generated in the plurality of error state detection circuits, respectively, and an error state identification signal output terminal outputting an error state identification signal.
Claims8
A semiconductor element drive device driving a semiconductor element, comprising:
- a plurality of error state detection circuits each detecting an error state of the semiconductor element or the semiconductor element drive device and generating at least one error signal corresponding to the error state which has been detected;
- an error state identification signal generation circuit generating an error state identification signal having a different waveform for each type of the error state and having a smaller pulse width than each of the error signals based on the plurality of error signals generated in the plurality of error state detection circuits, respectively;
- an error state identification signal output terminal outputting the error state identification signal;
- a protection operation signal generation circuit generating a protection operation signal for protecting the semiconductor element based on the error state identification signal;
- a protection operation signal output terminal outputting the protection operation signal;
- and
- a protection circuit protecting the semiconductor element based on the protection operation signal.
Dependencies are inferred from the claim text.