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发明公开
CN107276574A 用于功率开关的软关断的电路和功率转换器 审中-实审 转让

用于功率开关的软关断的电路和功率转换器
摘要：
描述了一种用于功率开关的软关断的电路和功率转换器。在一方面，用于功率开关的软关断的电路包括：感测输入端，该感测输入端耦接至功率开关，以接收表示经过功率开关的电流的信号；比较器，该比较器将所述信号与表示功率开关的过电流情况的过电流阈值进行比较，并响应于指示过电流情况的比较输出触发信号；以及选通晶体管，该选通晶体管耦接至功率开关的控制端子，并且该选通晶体管被配置为响应触发信号而远离功率开关的控制端子转移部分驱动信号。
摘要（英）：

Circuitry for soft shutdown of a power switch and a power converters that includes circuitry for soft shutdown are described. In one aspect, circuitry for soft shutdown of a power switch includes a sense input to be coupled to a power switch receive a signal representative of current passing through the power switch, a comparator to compare the signal with an overcurrent threshold indicative of an overcurrent condition of the power switch and to output a triggering signal in response to the comparison indicating the overcurrent condition, and a gating transistor to be coupled to a control terminal of the power switch, the gating transistor configured to divert a portion of a drive signal away from the control terminal of the power switch in response to the triggering signal.

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