Patent ID: 9154033
Filing Date: 2015-10-06
Classification: F02D,H02M,H03M

Abstract:
1. A current control semiconductor device having a transistor that drives a load, a current-voltage converter circuit that converts a current of the load into a voltage, and an AD converter that converts an output voltage of the current-voltage converter circuit into a digital value on an identical semiconductor chip, the current control semiconductor device comprising: a reference current generation unit that superimposes a current pulse on the current of the load to vary a voltage digital value output by the AD converter; a gain/offset correction unit that subjects a variation in the voltage digital value by the reference current generation unit to signal processing to dynamically acquire a gain and an offset in a linear relational expression of the voltage digital value output by the AD converter and a current digital value of the load; and a current digital value calculation unit that corrects a voltage value output by the AD converter with the use of the gain and the offset acquired by the gain/offset correction unit.