| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a current detection circuit of a power semiconductor device having a small size and low loss by detecting current using a sense function of the power semiconductor device, and to provide a detection method. <P>SOLUTION: Known current is applied to a main region of a power semiconductor element (1), and current detection means (21) connected to a sense terminal S of the power semiconductor device detects the current. A variable voltage source circuit (22) detects a difference in properties between the main region and a sense region based on the detected current, and an output adjuster (221) adjusts an amount of offset and an amount of gain so as to match both the properties. In this case, an amount of offset and an amount of gain to be adjusted are supplied in serial or parallel to the output adjuster (221) from a CPU(3) provided on the outside. <P>COPYRIGHT: (C)2012,JPO&INPIT |
