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发明公开
CN106471740A 具有动态定时的多级栅极断开 有权

具有动态定时的多级栅极断开
摘要：
一种用于断开功率半导体开关(304)的电路(342，346)包括：断开晶体管(364)，其被耦合以将用于断开功率半导体开关的信号接入到功率半导体开关的控制端子上；以及反馈控制环路，其用于控制断开期间功率半导体开关的控制端子上的电压(UGE)。反馈环路包括：反馈路径，其用于反馈功率半导体开关的控制端子的电压的测量值；控制端子参考电压发生器，其用于生成时间相关的参考电压(UREF)；误差放大器(368)，其用于生成表示控制端子的电压与时间相关的参考电压之间的差值的误差信号；以及前向路径，用于向前传送误差信号，以用于控制通过断开晶体管将用于断开功率半导体开关的信号接入到功率半导体开关的控制端子上。
摘要（英）：

A circuit (342, 346) for turning off a power semiconductor switch (304) includes a turn-off transistor (364) coupled to switch a signal for turning off the power semiconductor switch onto a control terminal of the power semiconductor switch and a feedback control loop for controlling a voltage (UGE) on the control terminal of the power semiconductor switch during turn-off. The feedback loop includes a feedback path to feedback a measurement of the voltage of the control terminal of the power semiconductor switch, a control terminal reference voltage generator to generate a time-dependent reference voltage (UREF), an error amplifier (368) to generate an error signal representative of a difference between the voltage of the control terminal and the time-dependent reference voltage, and a forward path to convey the error signal forward for controlling the switching of the signal for turning off the power semiconductor switch onto the control terminal of the power semiconductor switch by the turn-off transistor.

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