Integrated circuit arrangement for current regulation
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Accused Products
Abstract
An integrated circuit arrangement for current regulation of an electromagnetic load, especially an electric motor, generator, solenoid valve, or the like, with a coil, a power switch element, and a freewheeling diode is disclosed. In one embodiment, the circuit arrangement has an integrated measurement resistor for measuring the coil current. The measurement resistor is arranged in a freewheeling path of the circuit arrangement in series between the freewheeling diode and the power switch element, and has a digital processing means connected after a voltage measurement device assigned to the measurement resistor for at least partial compensation of resistor manufacturing variations and/or temperature fluctuations in the voltage signal and/or an error due to analog voltage signal processing.
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Citations
30 Claims
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1. (canceled)
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2-10. -10. (canceled)
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11. An integrated circuit arrangement for current regulation of an electromagnetic load comprising:
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a coil;
a power switch element;
a freewheeling diode;
an integrated measurement resistor for measuring the coil current;
wherein the measurement resistor is arranged in a freewheeling path of the circuit arrangement in series between the freewheeling diode and the power switch element; and
digital processing means connected after a voltage measurement device assigned to it for at least partial compensation of resistor manufacturing variations and/or temperature influences on the voltage signal and/or an error due to analog voltage signal processing. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 30)
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22. An integrated circuit comprising:
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a power switch element coupled to a voltage source;
a measurement resistor coupled to the power switch element;
a freewheeling diode coupled to the measurement resistor;
a coil coupled between the power switch element and the measurement resistor such that the measurement resistor measures the coil current;
a voltage measurement device coupled across the measurement resistor to sample the voltage signal thereon; and
a process controller coupled to the voltage measurement device configured to compensate for variations on the voltage signal. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29)
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Specification