The embodiment of the present invention provides a load short-
circuit protection circuit, comprising: a sampling
resistor and a load tube unit connected in sequence, a load short-
circuit protection trigger unit and a
control unit; the sampling
resistor and the load tube unit include a sampling
resistor and a load tube connected to each other, which are used to connect the load, supply power to the load, and collect load current information; the load short-
circuit protection trigger unit outputs a short-circuit protection trigger
signal to the
control unit when a load
short circuit occurs; after receiving the short-circuit protection trigger
signal, the
control unit outputs a load tube drive
control signal to turn off the drive
signal of the load tube, thereby turning off the load tube. The load short-circuit protection circuit provided by the embodiment of the present invention realizes the collection of load current information, outputs a short-circuit protection trigger signal after judging that a fault occurs, and controls the closing of the load tube through a hardware circuit, thereby improving the
rapidity and reliability of the load short-circuit protection, and improving the
load carrying capacity of the capacitive load.