Patent ID: 9160195
Filing Date: 2015-10-13
Classification: H01L,H02J

Abstract:
1. A semiconductor device comprising: a transistor; a capacitor; a comparator; and a current detection circuit, wherein a charging current is supplied from a power source to a storage battery, wherein a current which depends on the charging current is supplied to the capacitor through the transistor, wherein charge corresponding to the current which depends on the charging current is accumulated to the capacitor, wherein the comparator is configured to output a signal to terminate the supply of the charging current from the power source to the storage battery when a potential of a terminal of the capacitor electrically connected to a terminal of the transistor and an input terminal of the comparator reaches a reference potential, wherein the current detection circuit comprises a resistor and a voltage-to-current converter circuit, wherein the resistor is configured to flow the charging current from the power source to the storage battery through a first terminal of the resistor and a second terminal of the resistor, and wherein the voltage-to-current converter circuit is configured to supply the current which depends on the charging current to the transistor in accordance with a potential difference between the first terminal of the resistor and the second terminal of the resistor.