1. An input voltage stabilization circuit for a rear combination lamp, comprising:an optical output unit comprising a plurality of Organic Light Emitting Diodes (OLEDs);
a voltage converter configured to supply an output voltage for driving the plurality of OLEDs by converting a first voltage supplied by a vehicle battery to the output voltage, the output voltage being different from the first voltage;
a feedback unit configured to provide, as feedback to the voltage converter, information regarding a maximum voltage value for the plurality of OLEDs; and
a converter protector configured to, upon occurrence of a failure in at least one of the plurality of OLEDs, protect the voltage converter,
wherein the voltage converter is further configured to adjust the output voltage based on the information provided as feedback by the feedback unit regarding the maximum voltage value for the plurality of OLEDs,
wherein the converter protector comprises a first output voltage unit configured to provide, as feedback to the voltage converter, information regarding a first limit voltage value based on a plurality of temperatures sensed at a plurality of points of a circuit board, and
wherein the first output voltage unit further comprises a diode AND gate configured to determine a maximum voltage among a plurality of voltages applied to a plurality of Negative Temperature Coefficient (NTC) thermistors.