A Simo Power Management Chip Based On Computer-aided Software Design

In recent years,as the fast development of power electronics technology,semi-conductor technology,IC design technology and IC manufacture technology develops rapidly, electronic products have continued to emerge. At the same time a variety of technical issues oncoming. As an example of electronic display products, from the earliest of the cathode-ray tube technology to liquid crystal display technology, there is a fundamental difference on the principle. However, the pace of the times did not stop; light-emitting diode display technology as well as organic light-emitting diode display technology comes one after another. Different technologies will inevitably lead to the basic parameters of their very different, therefore the heart of electronic products - power supply design direction toward professional. The future power chips must be specially designed for a product because it can integrate some specific features of the product features, product features can be a perfect interpretation.This paper is designed for active-matrix OLED displays that require positive and negative supply rails.With its wide input voltage range, the device is ideally suited for single-inductor multiple-output (SIMO) technology. Not only the chip area down to the smallest, but also to ensure good linearity and loop regulation. Data transmission on mobile devices when the input voltage will be constantly changing, which would interfere with AMOLED display images, but good linear transient characteristics can effectively avoid the interference of the input voltage changes.In this paper, the trend of portable power management chips to start. Firstly the paper introduced the switching power supply topology, control implementation, achievement and power control loop controls the power rectifier, and then refine the implementation of this circuit, followed by detailed analysis of sub-circuit of working principle.The simulation is based on the use of HSPICE simulation software in a variety of pairs under tolerance circuit functional verification and performance parameters of the simulation. The circuit designed in this paper uses BCD0.6um process. At last, this paper fixed on the overall circuit function of the simulation analysis. The final simulation waveforms and data meet the design requirements, to verify the theoretical analysis is correct.