| 摘要 |
PROBLEM TO BE SOLVED: To provide a current abnormality detection circuit that can normally detect the abnormalities of current, even if there is variations in the manufacturing of a potential control circuit, and to provide its current value adjustment method at abnormality detection. SOLUTION: Influences, generated by an offset voltageΔV and a second abnormality threshold voltage Vfc, with respect to a "fuse abnormality" to which high accuracy is required in its detection, and by the variation of a comparator circuit 32 can be eliminated at a time, while suppressing the deterioration of the detection accuracy of an "overcurrent abnormality" by the adjustment work applied to one place, such that a first abnormality threshold voltage Voc is increased with the same amount by the same amount of the second abnormality threshold voltage Vfc by adjusting a bias voltage Vb of a bias resistor 42 arranged downstream of a voltage divide circuit 40. COPYRIGHT: (C)2007,JPO&INPIT
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