| 摘要 |
PROBLEM TO BE SOLVED: To provide a current detection circuit for accurately preventing a breakdown of a sensing MOSFET. SOLUTION: In a power MOSFET connected to a power supply and a load in series and turning a connection of the load on or off, the sensing MOSFET having a drain electrode and a gate electrode commonly connected to the power MOSFET and the current detection circuit connected between a source electrode of the sensing MOSFET and the load, the current detection circuit changes an impedance of a current circuit in accordance with a current change of the power MOSFET and limits a current of the sensing MOSFET. COPYRIGHT: (C)2003,JPO
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