Patent ID: 7986534

Claim:
An image forming apparatus, comprising: an image forming unit; a voltage outputting part having a primary coil and secondary coil to supply a voltage to the image forming part; and a single monolithic chip to receive control data from at least one of the image forming unit and the voltage outputting part, to interrupt a current supplied to the primary coil according to the control data, and to generate the voltage with the interrupted current in the secondary coil, the monolithic chip including: a digital interfacing part to receive the control data and to provide a reference voltage value according to the received control data; and at least one high voltage channel to output the voltage, the at least one high voltage channel comprising: a digital controlling part to receive the reference voltage value from the digital interfacing part and a feedback voltage from the voltage outputting part, and to output a driving signal according to a comparison between the received reference voltage value and the feedback voltage; and a switching part to receive the driving signal from the digital controlling part and to interrupt the current supplied to the primary coil according to the driving signal.