The invention relates to a
digital switching converter protection circuit. The
digital switching converter protection circuit is composed of a fault
signal latch circuit (10), a fault
information transmission circuit (11), a reversed phase
driving circuit (12), a fault indication circuit (13), a pulse blocking
signal circuit (14) and a
switching signal circuit (15); the input end of the fault
signal latch circuit receives detected signals, and the output ends of the fault signal latch circuit are connected with the input ends of the
information transmission circuit (11) and the reversed phase
driving circuit (12); and the output ends of the reversed phase
driving circuit (12) are connected with the fault indication circuit (13), the pulse blocking signal circuit (14) and the
switching signal circuit (15) respectively. With the
digital switching converter protection circuit of the invention adopted, transient
overvoltage fault protection can be restarted automatically, and
self recovery ability is enhanced, the reliability of a digital switching converter
system is improved. The protection circuit is in a modular protection circuit, and therefore, expansion can be facilitated, and the design, production and manufacture of digital switching converter products can be benefitted.