| 摘要 |
A current load driving device includes a power supply terminal connected to a power supply line, an earth terminal connected to an earth line, one or more output terminals, a constant voltage source, a control unit, a current output unit, and a command unit. The constant voltage source supplies constant voltage to the control unit. The control unit outputs a control current to the current output unit so that a voltage between the power supply line and the earth line becomes a target voltage and stops the output of the control current if the voltage between the power supply line and the earth line does not reach the target voltage. The command unit provides a signal for switching ON and OFF the control current output to the current output unit. The current output unit increases or decreases a current to output to the output terminal.
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