An automobile LED driving device formed on an integrated circuit chip comprising: a current setting portion configured to set multiple reference currents (IL, IH) independently from one another by using multiple respective current setting resistors (RL, RH) connected externally of the integrated circuit chip , a current controller configured to select one of the multiple reference currents (IL, IH) based on a control signal (MODE (STOP)) provided from outside, an output transistor configured to control an output current (IOUT) to an automobile LED (LED1) connected externally based on the reference current selected by the current controller , characterised in that the automobile LED driving device further comprises a LED open circuit detector configured to detect an open circuit of the automobile LED (LED1), wherein the LED open circuit detector comprises: a first comparator configured to generate an LED open circuit detection signal (DET2) based on a comparison between a terminal voltage (VOUT) of an external terminal (T7) to which the automobile LED (LED1) is connectable externally and a first threshold voltage (VTH2), and an amplifier configured to generate a current restriction signal (ICLAMP) by amplifying a difference between the terminal voltage (VOUT) and a clamp voltage (VCLAMP) lower than the first threshold voltage (VTH2), wherein the current controller is adapted to control the output current (IOUT) to the automobile LED (LED1) based on the current restriction signal (ICLAMP) so the terminal voltage (VOUT) does not exceed the clamp voltage (VCLAMP). a current setting portion configured to set multiple reference currents (IL, IH) independently from one another by using multiple respective current setting resistors (RL, RH) connected externally of the integrated circuit chip , a current controller configured to select one of the multiple reference currents (IL, IH) based on a control signal (MODE (STOP)) provided from outside, an output transistor configured to control an output current (IOUT) to an automobile LED (LED1) connected externally based on the reference current selected by the current controller , characterised in that the automobile LED driving device further comprises a LED open circuit detector configured to detect an open circuit of the automobile LED (LED1), wherein the LED open circuit detector comprises: a first comparator configured to generate an LED open circuit detection signal (DET2) based on a comparison between a terminal voltage (VOUT) of an external terminal (T7) to which the automobile LED (LED1) is connectable externally and a first threshold voltage (VTH2), and an amplifier configured to generate a current restriction signal (ICLAMP) by amplifying a difference between the terminal voltage (VOUT) and a clamp voltage (VCLAMP) lower than the first threshold voltage (VTH2), wherein the current controller is adapted to control the output current (IOUT) to the automobile LED (LED1) based on the current restriction signal (ICLAMP) so the terminal voltage (VOUT) does not exceed the clamp voltage (VCLAMP). a first comparator configured to generate an LED open circuit detection signal (DET2) based on a comparison between a terminal voltage (VOUT) of an external terminal (T7) to which the automobile LED (LED1) is connectable externally and a first threshold voltage (VTH2), and an amplifier configured to generate a current restriction signal (ICLAMP) by amplifying a difference between the terminal voltage (VOUT) and a clamp voltage (VCLAMP) lower than the first threshold voltage (VTH2), wherein the current controller is adapted to control the output current (IOUT) to the automobile LED (LED1) based on the current restriction signal (ICLAMP) so the terminal voltage (VOUT) does not exceed the clamp voltage (VCLAMP). <EOS>