Patent ID: 8089790
Filing Date: 2012-01-03
Classification: H02M

Abstract:
1. A power supply input device including an AC (alternating current) power supply unit, a bridge diode, a DC (direct current) condenser, and a discharge resistance unit, comprising: a first resistance connected to the discharge resistance unit in parallel; and a switching unit connected to the first resistance and performing a switching operation according to an externally received control signal, the control signal selectively corresponding to a normal operation mode of a power supply system of the power supply input device and a standby mode of the power supply system, the control signal functioning as a ground signal in the normal operation mode to prevent current from flowing through a portion of the switching unit and functioning as a high impedance signal in the standby mode to allow current to flow through the portion of the switching unit, wherein when the control signal functions as the high impedance signal in the standby mode, a power consumed in the standby mode is less than a power consumed in the normal operation mode, and the switching unit includes