CURRENT DETECTION CIRCUIT, CURRENT DETECTION METHOD, AND SEMICONDUCTOR MODULE

• Main Author: TAKAGIWA, Kazumi
• Format: Patent
• Language: English
• Published: 07.01.2021
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; BASIC ELECTRONIC CIRCUITRY; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; PULSE TECHNIQUE; TESTING

There is provide a current detection circuit including: a current detection unit that detects a control current flowing between a control terminal of a semiconductor element of voltage-controlled type having a current detection terminal, and a drive circuit; an overcurrent detection unit that detects an overcurrent in response to a sense current exceeding an overcurrent threshold value, the sense current flowing through the current detection terminal; and an adjustment unit that sets, based on a detection result of the current detection unit, the overcurrent threshold value in a transient period during turn on and turn off of the semiconductor element to be higher than the overcurrent threshold value in a period other than the transient period.