An overcurrent detection circuit, a driving system, and an electronic device

Abstract

The application provides an overcurrent detection circuit, a driving system and electronic equipment. The overcurrent detection circuit comprises: a shunt unit, which is used for shunting a load current and outputting a detection current, the load current being several times of the detection current; a detection MOS tube, a drain electrode of the detection MOS tube being connected to an output end of the shunt unit, a source electrode of the detection MOS tube being connected to a ground terminal, and a gate electrode of the detection MOS tube being kept in an open state according to a first driving voltage; and an overcurrent detection module, which is used for detecting a drain voltage of the detection MOS tube, and judging that the load current is overcurrent if the drain voltage is greater than a preset overcurrent threshold, and judging that the load current is not overcurrent if the drain voltage is less than or equal to the preset overcurrent threshold. The technical scheme of the application not only reduces the power consumption of the circuit, but also improves the accuracy of overcurrent detection.

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