Patent ID: 8755198

Claim:
A control and driving device of a high voltage power supply (HVPS) of an image forming apparatus, the control and driving device, which controls and drives a transformer and a rectifying and multiplying unit, comprising: a control and driving circuit unit connected to a first side of the transformer and comprising: a low-pass filter (LPF) that low-pass filters a pulse width modulation (PWM) signal, and a switching control unit that amplifies the low-pass filtered signal, generates a high frequency switching signal by receiving the amplified signal as a driving voltage, outputs the high frequency switching signal to a coil connected to the first side of the transformer, and controls a high voltage output by receiving the high voltage output that is fed back; an input connecting unit to connect an external input of the HVPS with the control and driving circuit unit connected to the first side of the transformer; and an output connecting unit to connect an output of the control and driving circuit unit connected to the first side of the transformer with an input of the coil connected to the first side of the transformer, wherein components including the control and driving circuit unit, the input connecting unit, and the output connecting unit are integrated into one module board which is separate from the transformer, the module board being standardized for the components to be connected to the first side of the transformer to operate with different types of circuits to be connected to a second side of the transformer.