Patent ID: 8598942
Filing Date: 2013-12-03
Classification: G01R,G05F,H03K

Abstract:
1. A current correction circuit for a power semiconductor device, the current correction circuit comprising: a power semiconductor device with a sensing function, including a main region through which flows a main current which is a main portion of an input current, a sense region through which flows a sense current which is a sense portion of the input current, a main terminal connected to the main region and a sense terminal connected to the sense region; a temperature detecting unit including a temperature detecting device that detects an ambient temperature of the power semiconductor device and a terminal that outputs the detected ambient temperature; and a current correcting unit connected to the sense terminal and the temperature detecting unit, and including: wherein each of an output terminal of the current detecting unit and an output terminal of the correction unit is connected to a respectively corresponding control input terminal of the variable voltage source, wherein an output terminal of the temperature detecting unit is connected to a temperature information input terminal of the correction unit, wherein the sense terminal of the power semiconductor device is connected to a current input terminal of the current detecting unit, and wherein the output voltage of the variable voltage source is adjusted according to the detected ambient temperature and a current flowing to the sense terminal, to adjust the potential of the sense terminal, thereby correcting a characteristic difference between the main region and the sense region of the power semiconductor device.