片上开关电容DC-DC变换器的性能建模与效率提升设计技术

Wirel. Pers. Commun. Pub Date : 2022-01-03 DOI:10.21203/rs.3.rs-1219358/v1

Sunita Saini, D. Saini

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引用次数: 0

摘要

基本电荷矢量法分析是一种单参数优化技术，只考虑导通损耗，假设所有频率相关的开关(寄生)损耗可以忽略不计。本文研究了一种基于导通和开关损耗设计DC-DC SC变换器的通用结构。提出了一种寻找开关频率和开关尺寸的最佳值的新方法，从而计算出效率最大化的目标负载电流和输出电压。分析确定了在22nm技术节点上实现的目标负载电流为2.67mA的两相2:1串并联SC变换器的开关频率和开关尺寸。结果表明，要达到90%以上的目标效率和0.85V以上的输出电压，至少需要250MHz的开关频率，其中单位电池的开关尺寸对应于10Ω导通电阻。使用MATLAB和PSpice仿真工具进行结果验证。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Performance Modelling and Design Techniques for Efficiency Improvement in On-chip Switched-Capacitor DC-DC Converter

Fundamental charge vector method analysis is a single parameter optimization technique limited to conduction loss assuming all frequency-dependent switching (parasitic) loss negligible. This paper investigates a generalized structure to design DC-DC SC converters based on conduction and switching loss. A new technique is proposed to find the optimum value of switching frequency and switch size to calculate target load current and output voltage that maximize the efficiency. The analysis is done to identify switching frequency and switch size for two-phase 2:1 series-parallel SC converter for a target load current of 2.67mA implemented on a 22nm technology node. Results show that a minimum of 250MHz switching frequency is required for target efficiency more than 90% and the output voltage greater than 0.85V where the switch size of a unit cell corresponds to 10Ω on-resistance. MATLAB and PSpice simulation tools are used for results and validation.

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Wirel. Pers. Commun.

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