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发明公开
CN103840426A 一种升压保护电路 有权

一种升压保护电路
摘要：
本发明实施例公开了一种升压保护电路，所述电路包含升压电路和电流取样电路，所述电路还包括：光耦电路和开关电路，其中：光耦电路的第一输入端与电流取样电路的输出端连接，光耦电路第二输入端用于连接第一接地，光耦电路的第一输出端与开关电路的第一输入端连接；开关电路的第二输入端用于连接基准电压，开关电路的输出端与所述升压电路的采样电压端连接，开关电路用于当光耦电路的第一输出端与光耦电路的第二输出端导通后，将基准电压信号传输至所述升压电路的采样电压，以使升压电路的输出端停止信号输出。本发明实施例可以防止烧坏驱动器。
摘要（英）：

The embodiment of the invention discloses a step-up protection circuit. The circuit comprises a step-up circuit and a current sampling circuit. The circuit further comprises an optocoupler circuit and a switch circuit. The first input end of the optocoupler circuit is connected with the output end of the current sampling circuit. The second input end of the optocoupler circuit is used for being connected with first grounding. The first output end of the optocoupler circuit is connected with the first input end of the switch circuit. The second input end of the switch circuit is used for being connected with reference voltage. The output end of the switch circuit is connected with the sampling voltage end of the step-up circuit. The switch circuit is used for sending a reference voltage signal to the sampling voltage of the step-up circuit after the first output end of the optocoupler circuit and the second output end of optocoupler circuit are turned on, so that the output end of the step-up circuit stops signal outputting. According to the embodiment of the invention, a drive can be prevented from burnout.

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