PROTECTION CIRCUIT OF LED LIGHTING MODULE

摘要

PURPOSE: A protection circuit of an LED module is provided to prevent an rush current by preventing an overcurrent and an overvoltage through an NTC(Negative Temperature Coefficient) device and a PTC(Positive Temperature Coefficient) device. CONSTITUTION: A power input unit(10) applies the power to an LED module(30). A voltage drop prevention unit(40) is arranged between the power input unit and the LED module. The voltage drop prevention unit includes a PTC device(45). The PTC device prevents the voltage drop by limiting the overcurrent and the overvoltage. The PCT device is arranged on a positive power line. A reverse voltage prevention unit(50) is arranged in a rear side of the voltage drop prevention unit and includes a diode(20).