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发明公开
CN102568940A 低电压工作的延时保护驱动电路 有权

低电压工作的延时保护驱动电路
摘要：
本发明提供一种低电压工作的延时保护驱动电路，其包括：连接在待保护电路中、且用于采样所述待保护电路电压的采样元件；与所述采样元件连接、且用于将所采样的电压进行升压的升压电路；连接在所述升压电路输出端、且用于将所述升压电路输出的电压进行转换的转换电路；与所述采样元件连接、且用于将所述采样元件所采样电压进行滤波的滤波电路；分别与所述滤波电路及转换电路连接的第一比较电路；连接在所述第一比较电路输出端的延时电路；以及与所述延时电路连接及所述脱扣器连接、且用于驱动所述脱扣器的驱动电路。本发明的优点在于：延时保护动作准确、抗电磁干扰能力强。
摘要（英）：

The invention provides a low voltage operation delay protection drive circuit, which includes a sampling element connected in a to-be-protected circuit and used for sampling the voltage of the to-be-protected circuit, a booster circuit connected with the sampling element and used for boosting the sampled voltage, a conversion circuit connected at an output end of the booster circuit and used for converting the voltage output by the booster circuit, a filter circuit connected with the sampling element and used for filtering the voltage sampled by the sampling element, a first comparison circuit connected with the filter circuit and the conversion circuit respectively, a delay circuit connected at an output end of the first comparison circuit, and a drive circuit connected with the delay circuit and a release respectively and used for driving the release. The low voltage operation delay protection drive circuit has the advantages that the delay protection action is accurate, and the anti-electromagnetic-interference capability is strong.

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