Electric current driving electronic broken circuit protecting equipment

The invention relates to a protector for current drive electric open circuit, and it consists of a current mirror circuit, a crossbar circuit and a power mental-oxide field effect transistor. It uses a Current-to-Voltage Converter to control the voltage of Emitter of BJT or the Source of FET, the two sides of the current mirror can generate anisomerous current to provide the arrangement for the current mirror, that is keeping four transistors in current detecting loop in workaround, then using the Latch Circuit to drive the switch circuit constituted by power MOS filed-effect transistor to form a electric open circuit protector which is fast, low damage and revert automatically.