SMPS(SWITCHING MODE POWER SUPPLY) CAPABLE OF PROTECTING SYSTEM BY SENSING SHORT-CIRCUIT EVEN WITHOUT USING FUSE, AND DISPLAY APPARATUS

摘要

Purpose: one SMPS and display is provided to and is effectively prevented fire, by feeling output-terminal circuit short circuit even if a transformer of the switch mode power supply for not using a fuse. Construction: a display includes an induced voltage sense unit (40), is used to measure the amplitude of voltage, induces the scheduled contact to a grade sensor circuit of a SMPS, exports the signal of a short circuit sense; One controller (50) is used to cut away the voltage-induced of secondary induction circuit, to prevent short circuit sense signal less than a reference voltage place.