发明名称 Driver apparatus for switching elements
摘要 In a driver apparatus for driving a voltage-controlled switching element, an absolute value of a voltage difference between a voltage at a reference terminal that is one of terminals of a current path of the switching element and a voltage at the switching control terminal of the switching element is clamped at a clamping voltage greater than a threshold voltage. A voltage greater than the threshold voltage applied to the switching control terminal allows the switching element to be turned on. When the current flowing through the switching element becomes equal to or greater than a clamp threshold after the switching element transitions from an off-state to an on-state, a voltage-drop-rate at which the absolute value is decreased to the clamping voltage is decreased.
申请公布号 US8749279(B2) 申请公布日期 2014.06.10
申请号 US201313959907 申请日期 2013.08.06
申请人 Denso Corporation 发明人 Morita Hiroyuki;Maebara Tsuneo;Komatsu Takeyasu;Miura Ryotaro;Suzuki Tomotaka
分类号 H03K3/00 主分类号 H03K3/00
代理机构 代理人
主权项 1. A driver apparatus for driving a voltage-controlled switching element, the apparatus comprising: on-state transition means for, in response to a first operation signal indicative of turn-on instruction, turning on the switching element by charging a switching control terminal of the switching element; off-state transition means for, in response to a second operation signal indicative of turn-off instruction, turning off the switching element by discharging the switching control terminal of the switching element; clamp means for clamping an absolute value of a voltage difference between a voltage at a reference terminal that is one of terminals of a current path of the switching element and a voltage at the switching control terminal of the switching element at a clamping voltage that is greater than a threshold voltage, a voltage above which applied to the switching control terminal allowing the switching element to be turned on; and voltage-drop-rate decreasing means for, when an amount of current flowing through the current path of the switching element becomes equal to or greater than a clamp threshold value after the switching element transitions from an off-state to an on-state, decreasing a voltage-drop-rate at which the absolute value of the voltage difference is decreased to the clamping voltage as compared to a voltage-drop-rate at which the absolute value of the voltage difference is decreased to the clamping voltage by the off-state transition means only.
地址 Kariya JP