Modular control and driving device and high voltage power supply having the same for image forming apparatus

摘要

A control and driving device of a high voltage power supply (HVPS) of an electronic apparatus, such as an image forming apparatus, including an input to receive a signal supplied to the HVPS, a control and driving circuit to control and drive the signal received at the input, and an output to output the controlled and driven signal to a transformer of the HVPS, wherein the input, control and driving circuit, and output are integrated into one physical module.

主权项

1. 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, anda 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.