Semiconductor device
AssigneeMitsubishi Electric Corporation
InventorMitsuru KANEDA
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Abstract
An object is to provide a technique capable of appropriately setting a semiconductor switching element. A semiconductor device includes a control circuit obtaining main current using a correlation between sense voltage and the main current and determining whether or not the main current exceeds a threshold value, wherein in the correlation, when one of the sense voltage and the main current gets large, another one thereof non-linearly gets large, and a ratio of change of the main current to the sense voltage in a case where the sense voltage is larger than predetermined voltage is smaller than the ratio in a case where the sense voltage is smaller than the predetermined voltage.
Claims5
A semiconductor device, comprising:
- a semiconductor switching element including a main terminal in which main current flows and a sense terminal in which sense current having a correlation with the main current flows;
- a voltage generation circuit made up of only a passive element and generating sense voltage based on the sense current;
- and
- a control circuit obtaining the main current corresponding to the sense voltage which has been generated using a correlation between the sense voltage and the main current and determining whether or not the main current exceeds a threshold value, wherein
- in the correlation,
- when one of the sense voltage and the main current gets large, another one of the sense voltage and the main current non-linearly gets large, and
- a ratio of change of the main current to the sense voltage in a case where the sense voltage is larger than predetermined voltage is smaller than the ratio in a case where the sense voltage is smaller than the predetermined voltage.
Dependencies are inferred from the claim text.