The invention discloses a current monitoring circuit with the accurate current-limit function. The current monitoring circuit with the accurate current-limit function comprises an
operational amplifier, wherein a forward input end and a reverse input end of the
operational amplifier are respectively connected with a
resistor in series, the resistors are symmetrical to each other, the reverse input end of the
operational amplifier is connected to the output end of the operational
amplifier in series through a
resistor R1 and a
capacitor C1, the symmetrical resistors which are connected with the operational
amplifier in series are further in ground connection, an output filtering loop is formed by an
inductor L1 and a
capacitor CL, a load RL is connected to the
capacitor CL in parallel, and is connected with a feedback
resistor Rf in series, the feedback resistor Rf is connected to the forward input end of the operational
amplifier am1 in series, and is used for carrying out sampling on current change signals of the output filtering loop, and the sampled current change signals are converted into
voltage signals to be input into the forward input end of the operational amplifier. The current monitoring circuit with the accurate current-limit function directly detects output current signals, the output current signals are converted into the
voltage signals through the resistors, and compared with reference
voltage, the level of an enabling end can be reduced through output overturn of the operational amplifier, and short-
circuit protection is achieved.