Patent ID: 9494654
Filing Date: 2016-11-15
CPC Classification: F02N,G01R

Claim Text:
1. A semiconductor device, comprising: first and second external terminals coupled to power supply wiring that couples one end of a current detecting resistance and a power supply terminal of a battery; a third external terminal coupled to an other end of the current detecting resistance; a measurement part for measuring a voltage difference between the first external terminal and the second external terminal; a first resistance coupled between the second external terminal and the one end of the current detecting resistance; a first current source for outputting a first measurement current to the second external terminal; a second current source for outputting a second measurement current to the third external terminal; and a control circuit for controlling an output of the second measurement current destined to the third external terminal, wherein the first and second external terminals are coupled on a same side to the first resistance via an uninterrupted current path, and wherein the control circuit intercepts outputs of the first and the second measurement currents by the first and the second current sources in a current monitoring operation of measuring a current monitor voltage value that varies according to a current flowing through the current detecting resistance, and measures a voltage difference between the second external terminal and the third external terminal in the current monitoring operation.