| 摘要 |
PURPOSE: A power circuit for reducing electromagnetic interference noise is provided to reduce EMI(Electromagnetic Interference) noise from a power circuit of a driver IC by adding an LC filter composed of an inductor and a capacitor inside a circuit. CONSTITUTION: A power circuit for reducing EMI(Electromagnetic Interference) noise includes a power supply unit(10) and an LC(Inductor Capacitor) filter(20). The LC filter includes an inductor and an electrolytic capacitor The inductor is serially connected to an output terminal of a power supply unit supplying the power to a drive IC(integrated circuit)(30). The electrolytic capacitor is connected in parallel with the inductor and the power supply unit at the output terminal of the inductor. The inductor is preferably 470mH. The electrolytic capacitor is preferably 220μF. A ripple component which is input/output through the power supply unit can be removed. |
