The methods to calculate the inductance inputcapitance and output capitance for the Buck converter from 3. 3V to 2. oVare given in the end. Key Words: Burst Mode Pulse Skip Mode Force Continuous ModeLight Output Load Li前高频高效的Buck变换器的应用越来越 广泛。通常系统在满输出负载时,系统...
ApplicationNote王信雄AN009–Jul2014AN009©2014RichtekTechnologyCorporation1Buck转换器的电流纹波系数CurrentRippleFactorofaBuckConverter摘要电感和电容在Buck转换器中构成低通滤波器,此LC滤波器的转折频率总是设计得较低以便滤除开关纹波。常用的设计规则是,电感电流纹波被设计成电感平均电流的30%左右。本文引入表达电感...
In this application note, a theoretical derivation of ripple current to average current ratio, also called ripple factor, is introduced to get inductor size equation, which is helpful for capacitor design as well as the total converter design.
Buck转换器的电流纹波系数 Application Note 王信雄 AN009 – Jul 2014 AN009 © 2014 Richtek Technology Corporation 1 1. 介绍 (2)2. 纹波系数 (3)3. 电感的面积积 (4)4. 一个设计示例 (6)5. 总结 (7)
featuredforforcecontinuousmodewithpositiveandnegativecurrentthroughtheinductor.Theefficiencyandouputripplevoltageofpulseskipmodewithskippingsomeswithchingpulseisbetweenthatoftwomodesabove.ThemethodstocalculatetheinductanceinputcapitanceandoutputcapitancefortheBuckconverterfrom3.3Vto2.5Varegivenintheend.KeyWords:BurstMode...
The two different modes are discussed in greater detail later and design guidelines for the inductor value to maintain a chosen mode of operation as a function of rated load are given. It is very desirable for a converter to stay in one mode only over its expected operating conditions because...
Fig.1 SIDO Buck converterSIDO Buck变换器的开关管占空比存在Di>Db、Di=Db和Di<Db三种情况,对应有三种工作方式[12],由于三种工作方式的分析方法类似,限于篇幅,本文以Di<Db的工作方式为例对SIDO Buck变换器的供能模式和输出纹波电压进行讨论。1.1 CCM供能模式分析当SIDO Buck变换器工作在CCM时,根据最小电感电流IL...
Key words : buck converter;interleaved parallel;three-teminal switch-inductor network 0 引言 随着信息技术的迅速发展,电子随身产品如智能手机、笔记本电脑等对电源的性能要求也越来越高,总体趋势是低电压、大电流以及小纹波[1-3]。基于此,国内外针对对此类特殊电源进行了大量研究。 传统buck变换器受电路参数的影响...
For the design of the buck converter, the current ripple in the inductor L and the output voltage ripple in the capacitor C are used as the design criterion. The inductance and capacitance values can be calculated following the expressions of the current and voltage ripples defining the values ...
Fig.7 The input inductor current experimental waveforms of the converter proposed in this paper 图8 基本二次型Buck-Boost输入电感电流实验波形 Fig.8 Basic quadratic Buck-Boost input inductor current experimental waveforms 图9Vin=8V时输出电压对比实验波形 ...