| 摘要 |
PROBLEM TO BE SOLVED: To enhance the operation reliability of a high breakdown voltage power integrated circuit that incorporates a totem pole circuit composed of a high breakdown voltage n-channel MOS device. SOLUTION: An OFF control circuit 6 is added to a conventional high breakdown voltage power integrated circuit consisting of a totem pole circuit 1, an upper arm side drive circuit 2, a lower arm side drive circuit 3, a MOSFET 4 and a level shifter circuit 5. The OFF control circuit 6 is activated by switching on a MOSFET1b as a lower arm side device of the totem pole circuit 1 to prevent malfunctioned ON of a MOSFET1a as an upper arm side device of the totem pole circuit 1.
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