Analog HVPS ASIC Integration for Compact Image Forming Control
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Solution Overview
Problem
Conventional high voltage power supplies for image forming apparatuses require numerous components, leading to increased assembly time, space requirements, and potential output voltage distortion due to component deviations, necessitating a more efficient and simplified configuration.
Innovation Solution
A one-chip analog control ASIC apparatus for high voltage power supplies that integrates key components such as a transformer, voltage doubler, low pass filter, PWM modulator, gate driver, and feedback unit to reduce component count and simplify assembly, while maintaining high voltage output control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional analog control units with multiple components (resistors, capacitors, transistors, ICs, diodes) are used, then the control function can be achieved, but the number of components increases assembly procedures and working time
Solution Approach 1:
The patent merges multiple discrete components (resistors, capacitors, transistors, ICs, diodes) into a single integrated control unit that combines all necessary control functions. This integration eliminates the need for separate assembly procedures for each component, directly reducing assembly time and simplifying the manufacturing process.
2Ease of manufacture
If conventional analog control units with multiple components are used, then the control function can be achieved, but PCB space should be prepared
Solution Approach 1:
The patent integrates multiple control components into a single compact control unit, significantly reducing the space required on the PCB. Instead of allocating separate areas for resistors, capacitors, transistors, ICs, and diodes, the integrated unit occupies a single, smaller footprint on the circuit board.
3Ease of manufacture
If conventional analog control units with multiple components are used, then the control function can be achieved, but output voltage may be distorted due to characteristic deviation between components
Solution Approach 1:
The patent combines multiple discrete components into a single integrated control unit, eliminating the characteristic deviations that occur between separate components. This integration ensures consistent electrical characteristics and stable output voltage, as the integrated unit maintains uniform manufacturing tolerances and electrical properties throughout the control circuit.
4Ease of manufacture
If conventional analog control units with multiple components are used, then the control function can be achieved, but a unit component may be rendered defective due to outside cause
Solution Approach 1:
The patent integrates multiple control components into a single control unit, reducing the total number of potential failure points. Instead of having multiple discrete components that could individually fail due to external causes, the integrated unit provides a more reliable system with fewer connection points and components that could be affected by environmental factors.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enhances space utilization, simplifies the assembly process, reduces costs through mass production, and maintains high voltage output quality by integrating multiple functions into a single ASIC chip, thereby improving efficiency and reducing the volume of the control unit.
Implementation Method 1
a transformer transforming an AC signal having a predetermined frequency to a high voltage signal
Implementation Method 2
a voltage doubler outputting a DC high voltage for the HVPS in the image forming apparatus by rectifying and doubling a secondary high voltage signal of the transformer
Data Source
AI summary
An analog control application specific integrated circuit (ASIC) apparatus for a high voltage power supply (HVPS) in an image for apparatus, and a method for controlling the HVPS are provided. The HVPS includes a transformer transforming an AC signal to a high voltage signal and a voltage doubler outputting a DC high voltage for the HVPS. The ASIC includes an analog control circuit configured as a one-chip ASIC that converts a predetermined DC level signal to a high frequency switching signal using a switching component and outputs the converted high frequency switching signal to a primary winding of the transformer. If the high voltage output signal output from the voltage doubler is not feedbacked, the switching component high frequency switches a received driving signal of a gate driver, and outputs the high frequency switched signal to the transformer.