基于目标阻抗匹配的电源分配网络设计优化

针对可靠保证电源分配网络的时域瞬态响应、全频域稳态响应、极低目标阻抗、电源及信号完整性设计目标的问题,提出了一种基于目标阻抗匹配的电源分配网络设计优化的方法。以低功耗Zigbee遥控器为例,从目标阻抗分配、寄生参数预估、蒙特卡罗分析、回流路径规划、结果对比分析及工程实施探讨这6个方面阐述低功耗大动态电流电路PDN的设计与优化。基于2级共模电感(双T型网络)搭建目标PDN,实现VRM输出端与PDN输入端及PDN输入端与输出端的阻抗匹配。结果表明,该方法能够成功指导PDN的设计优化,可以提高实际的PCB设计质量,降低设计风险,减少设计修改和制作的次数,从而缩短市场开发周期、减少开发成本。对于实际工作中的设计观念、设计流程及设计手段的改进与完善具有现实指导意义,是工程可行的,并具有良好的应用推广价值。

Design and Optimization Method of Power Distribution Net Which Is Based On Matching Target Impedance

Aiming at the problem of the time domain transient response, steady state response of full frequency domain, low target impedance, power and signal integrity design of the power distribution network, this paper brought forward one kind of the method that design and optimization of power distribution net which is based on matching target impedance. Taking a low-power consumption Zigbee remote as example, this paper discussed the method from 6 aspect which were distribution of target impedance, estimate parasitism parameter, Monte Carlo analysis, back-flow route plan, comparative analysis of simulation result and the project implement. This paper had build the target PDN based on common mode transformer of 2-stair (pair of T types network), realized matching output impedance of VRM to input impedance of PDN, and matching input impedance to output impedance of PDN. Result is indicated, this method is able to guide the design and optimization of PDN successfully, can rise quality of actual PCB design, lessening design risk, cut down the number of times of designing modification and fabrication, shorten the marketplace construction cycle, and cut down cost of development thereby. This method had huge practical guiding significance for improving and perfecting of designing concept, designs technological process and designing means in actual engineer works, the method is result to be project feasible, it had fine application extension value also.