| 主权项 |
1. An igniter comprising:
a switch device connected to a primary coil of an ignition coil; and a switch controller configured to control the switch device in response to an ignition signal from an ECU (Engine Control Unit), wherein the switch controller includes: an input line to which the ignition signal is input; a determination stage in which a voltage of the input line is compared with a predetermined reference voltage to generate a determination signal based on a result of the comparison; a drive stage in which ON/OFF of the switch device is controlled in response to the determination signal; a current comparison circuit, the current comparison circuit receiving a first power supply voltage, comparing a coil current flowing through the switch device with at least one reference current, and generating a feedback signal having a logical level based on a result of the comparison; an output transistor having one end grounded and the other end connected to a terminal for outputting an ignition check signal, the output transistor having a threshold voltage higher than the first power supply voltage; and a level shifter to receive a second power supply voltage higher than the threshold voltage of the output transistor, to level-shift the feedback signal, and to output the level-shifted feedback signal to a control terminal of the output transistor. |
