| 摘要 |
PROBLEM TO BE SOLVED: To drive a load circuit, and to monitor the on/off states of the load circuit in a simple circuit constitution. SOLUTION: This load driving circuit is provided with an MOSFET 24 whose power supply terminal is connected to a lamp load 1 for supplying a power supply voltage to the lamp load 1 by performing on/off operations according to a load driving control signal, a strobe circuit part 22 for performing on/off operations according to the monitor control signal in a timing in which the state of a lamp switch 2 is monitored, a pull-up resistance 25 connected to the strobe circuit part 22, and a microcomputer 21 for supplying a load driving control signal to the MOSFET 24 in order to perform on/off control so that the lamp load 1 can be driven, and for supplying a monitor control signal to the strobe circuit part 22 in order to perform on/off control so that the state of the lamp switch 2 can be monitored based on a voltage value by the pull-up resistance 25. |
