| 摘要 |
There are provided: a voltage division circuit ( 13 ) that performs voltage division of the voltage applied between the main electrodes of a non-latching switching element ( 11 ) having two main electrodes and a single control electrode at voltage division elements ( 14 a) to ( 14 c); a control current source ( 16 ) that injects current at the control electrode in accordance with the divided voltage of main voltage detection voltage division elements, of the voltage division elements ( 14 a) to ( 14 c) of the voltage division circuit ( 13 ) and a voltage division ratio control circuit ( 20 ) that adjusts the voltage division ratio of the main voltage detection voltage division elements ( 14 b), ( 14 c) of the voltage division circuit ( 13 ) in accordance with a control signal for controlling the switching element ( 11 ).
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