HANDOTAISUITSUCHIKAIRO

摘要

PURPOSE:To decrease the gate drive current by sharing a gate drive current of two PNPN switches connected in series. CONSTITUTION:An anode terminal of the 1st PNPN switch Q1 is connected to a DC supply circuit N1 and a cathode is connected to a subscriber terminal T. An anode of the 2nd PNPN switch Q2 is connected to the subscriber terminal T and a cathode is connected to the DC power supply circuit N1. A gate drive current source circuit comprising a transistor 7 is connected in common between a gate of the 1st PNPN switch Q1 and a gate of the 2nd PNPN switch Q2. Thus, the gate drive current of the two PNPN switches connected in series is decreased.