Load Driving Device and Electrical Device Using the Same
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Accused Products
Abstract
A load driving device according to the present invention includes: a first current generation section generating a first current in accordance with a driving current of a load; a second current generation section generating a predetermined second current; an integration section charging and discharging a capacitor in accordance with magnitude relation between the first current and the second current; a comparison section comparing a terminal voltage of the capacitor and a predetermined threshold voltage; and an output section generating a protection signal based on output logic of the comparison section. Such configuration permits appropriately preventing load burnout.
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Citations
25 Claims
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1-10. -10. (canceled)
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11. A load driving device comprising:
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a first current generation circuit arranged to generate a first current in accordance with a driving current of a load; a second current generation circuit arranged to generate a second current in accordance with a predetermined second current; a first circuit arranged to output a voltage in response to magnitude relation between the first current and the second current; and an output section arranged to generate a protection signal based on the voltage of the first circuit. - View Dependent Claims (12, 13, 14, 15, 16)
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17. An electric device comprising:
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a load driving device; a load controlled by a driving current from the load driving device; and a microcomputer arranged to receive an input of a protection signal from the load driving device, wherein the load driving device comprises; a first current generation circuit arranged to generate a first current in accordance with a driving current of a load; a second current generation circuit arranged to generate a second current in accordance with a predetermined second current; a first circuit arranged to output a voltage in response to magnitude relation between the first current and the second current; and an output section arranged to generate a protection signal based on the voltage of the first circuit. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25)
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Specification