Open-circuit protection circuit

The invention discloses an open-circuit protection circuit, which comprises two branch load circuits of a constant-current driving circuit, a voltage stabilizing unit, an open-circuit detection unit and a short circuit unit. Two connection ends of the voltage stabilizing unit are connected with the two ends, with the same polarity, of the two branch load circuits; the other ends, with the same polarity, of the two branch load circuits have equal potential; the two ends, with the same polarity, of the two branch load circuits are also connected with two input ends of the open-circuit detectionunit respectively; and the output end of the open-circuit detection unit is connected with a control end of the short circuit unit. The open-circuit protection circuit has the advantages of low realization cost and wider application range.