CONTROLLNG CURCUIT FOR DC CHARGING

摘要

PURPOSE: A DC charging control circuit is provided to minimize a standby power before the charging by supplying a charging voltage in response to the connection between an external battery and an external battery connection unit. CONSTITUTION: A PWM(Pulse Width Modulation) controller(120) outputs a PWM signal in response to a voltage control signal of a microprocessor. An inner battery stores the DC power outputted from a DC smoothing unit(130). A switching device switches the electric connection between the connection node of the inner battery and the external battery connection unit. A photocoupler(150) performs the optical switching in response to a current control signal of the microprocessor. A switching controller(140) controls the charged or discharged current amount of the battery according to the current control signal or voltage control signal of the microprocessor.