OPERATING ERROR CONTROL SYSTEM OF LOW VOLTAGE DC-DC CONVERTER AND DRIVING METHOD

摘要

PURPOSE: An LDC error controlling system and a driving method thereof are provided to improve the reliability of an LDC by blocking a reverse current through a buck diode and a boost relay in a buck mode. CONSTITUTION: An LDC(Low-Voltage DC-DC Converter) error controlling system(10) is installed between a main battery(1) of a high voltage and a sub battery(2) of a low voltage. A buck diode is electrically connected between a first electrode of a sub battery and a first electrode of an LDC(3) and transmits currents from the LDC to the sub battery. A boost relay is connected in parallel to the buck diode and transmits currents between the LDC and the sub battery when the current is applied from a cathode to an anode of the buck diode.