Patent ID: 8879226

Claim:
A high side switch circuit comprising; an input terminal for receiving a current supplied from a power supply; an output terminal for supplying said current to a load; a first switch electrically connected between said input terminal and said output terminal; a resistive element including a first terminal electrically connected to said input terminal and a second terminal electrically connected to said output terminal; and a sensor circuit receiving a detection voltage generated at said resistive element as said current flows between said input terminal and said output terminal, for sensing that said current is an over-current, when said current reaches an over-current level and said detection voltage exceeds a threshold voltage, said sensor circuit including: an adjustment circuit for adjusting in advance said detection voltage such that said detection voltage exceeds said threshold value if said current is at an over-current level; and a comparator for comparing said detection voltage with said threshold voltage, wherein the adjustment circuit is configured to adjust offset of an input voltage of said comparator, for adjusting said detection voltage, wherein said comparator includes: a differential unit for changing its output voltage, in accordance with a voltage difference between a voltage at said first terminal of said resistive element and a voltage at said second terminal of said resistive element, and a plurality of transistors, connected in parallel with said differential unit, for changing relation between said voltage difference and said output voltage, by adjusting current flowing through said differential unit; and wherein said adjustment circuit includes a fuse resistor connected to a corresponding one of said plurality of transistors.