Switching element driving circuit


PURPOSE: To control the current supplied from 8 boosting power circuit at a fixed level in order to drive a current drive type switching element. CONSTITUTION: A current detector 17 detects the current supplied from a boosting power circuit 14 in order to drive a current drive type switching element 12 containing a load 11 at the ground side. A boosting control circuit 16 controls the circuit 14 so as to keep the detected current at s fixed level. As a result, the current which drives the element 12 is not decided by the resistance and therefore the power loss and the generation of heat caused by the resistance can be eliminated. COPYRIGHT: (C)1992,JPO&Japio




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