Patent ID: 8823354

Claim:
A power semiconductor switch series circuit, comprising: a plurality of series modules, each of the series modules comprising: a power semiconductor switch having a first terminal, a second terminal and a third terminal, wherein the first terminal receives a drive signal, the second terminal is coupled to a third terminal of a power semiconductor switch of an adjacent series module, and the third terminal is coupled to a second terminal of an power semiconductor switch of another adjacent series module; a drive module connected electrically to the first terminal of the power semiconductor switch, for outputting the drive signal, so as to drive the power semiconductor switch to be turned on or turned off by the drive signal; a short-circuit detection unit connected electrically to the power semiconductor switch, for outputting at least one detection signal; an equalizer circuit connected electrically between the second terminal and the third terminal of the power semiconductor switch, for performing static and dynamic voltage equalization on the power semiconductor switch; a comparison module connected electrically to the short-circuit detection unit, for receiving the detection signal and comparing the detection signal with a predetermined threshold, and outputting a short-circuit signal when the detection signal exceeds the predetermined threshold; and a soft turn-off module, wherein when receiving the short-circuit signal from the comparison module, the soft turn-off module outputs a second control signal corresponding to the short-circuit signal to the drive module; and a system control module electrically connected to the comparison module and the drive module of each series module, wherein when receiving the short-circuit signal from the comparison module, the system control module outputs a first control signal corresponding to the short-circuit signal to the drive module so as to turn off the power semiconductor switch of each series module.