VEHICULAR LED LIGHTING CONTROL DEVICE AND METHOD FOR CONTROLLING VEHICULAR LED LIGHTING CONTROL DEVICE

摘要

This vehicular LED lighting control device is provided with: a short-circuit current limiting circuit which, between a first LED terminal and one end of a capacitor, is connected in series to an overcurrent limiting circuit and a detection resistor of a current detection circuit, and which increases in resistance and limits the current that flows between the first LED terminal and the one end of the capacitor when a short circuit detection circuit detects a short circuit between the first LED terminal and a second LED terminal; and a voltage detection circuit which detects the potential difference between the first LED terminal and the one end of the capacitor and which controls a power supply switch to forcibly turn off the power supply switch when the potential difference reaches a preset value.