An automobile LED driving device comprising: a current setting portion to generate multiple reference currents (IL, IH) independently from one another for multiple respective current setting resistors (RL, RH) connected externally to the automobile LED driving device, a current controller to select one of the multiple reference currents (IL, IH) based on a control signal provided from outside the automobile LED driving device, wherein the current controller controls a current supply to an automobile LED connected externally to the automobile LED driving device based on a protect bus signal (PBUS), and an output transistor to control an output current (IOUT) to the automobile LED based on the reference current selected by the current controller, a protect bus controller to generate the protect bus signal according to a detection of an abnormality and to perform an external input/output process for the protect bus signal (PBUS), a protect bus terminal which is an input/output terminal for the protect bus signal, wherein, in case that an abnormality is detected in the automobile LED driving device, the protect bus controller sets the protect bus signal (PBUS) at the protect bus terminal to a first logic level when detecting an abnormality, and to a second logic level when not detecting an abnormality; and in case that the protect bus signal (PBUS) applied to the protect bus terminal is at the first logic level, the protect bus controller generates a signal to cause the current controller to forcibly turn OFF the supply of the output current (IOUT), characterized in that the automobile LED driving device further comprises a LED ground short detector to detect the ground short of the automobile LED, wherein the current controller turns OFF a supply of the output current forcibly when the ground short of the automobile LED occurs, and wherein the LED ground short detector comprises: a first comparator to generate a LED ground short detection signal based on a comparison between a forward drop voltage of the automobile LED or a monitor voltage according to the forward drop voltage and a first threshold voltage, and a ground short recovery circuit to generate the forward drop voltage by flowing current to the automobile LED when recovering the ground short of the automobile LED. a current setting portion to generate multiple reference currents (IL, IH) independently from one another for multiple respective current setting resistors (RL, RH) connected externally to the automobile LED driving device, a current controller to select one of the multiple reference currents (IL, IH) based on a control signal provided from outside the automobile LED driving device, wherein the current controller controls a current supply to an automobile LED connected externally to the automobile LED driving device based on a protect bus signal (PBUS), and an output transistor to control an output current (IOUT) to the automobile LED based on the reference current selected by the current controller, a protect bus controller to generate the protect bus signal according to a detection of an abnormality and to perform an external input/output process for the protect bus signal (PBUS), a protect bus terminal which is an input/output terminal for the protect bus signal, wherein, in case that an abnormality is detected in the automobile LED driving device, the protect bus controller sets the protect bus signal (PBUS) at the protect bus terminal to a first logic level when detecting an abnormality, and to a second logic level when not detecting an abnormality; and in case that the protect bus signal (PBUS) applied to the protect bus terminal is at the first logic level, the protect bus controller generates a signal to cause the current controller to forcibly turn OFF the supply of the output current (IOUT), characterized in that the automobile LED driving device further comprises a LED ground short detector to detect the ground short of the automobile LED, a first comparator to generate a LED ground short detection signal based on a comparison between a forward drop voltage of the automobile LED or a monitor voltage according to the forward drop voltage and a first threshold voltage, and a ground short recovery circuit to generate the forward drop voltage by flowing current to the automobile LED when recovering the ground short of the automobile LED.