【成功案例】如何对车载仪表DC-DC开关电源电路的输出电容进行选型?
DC-DC电源转换器因其较高的电源效率获得了非常广泛的应用,很多设计者都将分离器件式的LDO电源换成DC-DC开关电源进行设计,而DC-DC转换器的输出电容,对实现电压转换器的输出电压稳定性起着重大作用,需要仔细进行选型。笔者将以一款车载仪表产品中DC-DC降压转换器为例,分享如何经过一系列的设计分析后从Nippon Chemi-Con(黑金刚)推出的一系列电容里选择正确合适的型号。
Buck拓扑结构
DC-DC降压转换器又称Buck电路,Buck电路的拓扑结构如图1所示,输入电压为Vin,输出电压Vout=D*Vin,其中D为开关频率的占空比:
图1 Buck电路拓扑结构
它的特点是:
· 把输入降至一个较低的电压
· 电感/电容滤波器滤平开关后的方波
· 输出总是小于或等于输入
· 输入电流不连续 (斩波)、输出电流平滑
· 输入输出同相
电容选型
图2为Buck电路示意图,C为输出电容(可表示为Cout),ic(t)为输出电容Cout上流过的电流,iL(t)为电感L上的电流,VIN、 Vout分别是输入电压、输出电压,iR(t)为负载电流,RLOAD为负载。
图2 Buck电路示意图
图3是Buck电路输出电容上的电压电流变化图:
图3 Buck电路输出电容的电压电流图
笔者设计的车载仪表DC-DC降压转换器电路见图4,使用的电源IC为LMR14030DQDPRRQ1,电容Cout从厂商黑金刚里一系列的电容型号里选择(详见图5),电路的输入电压Vin=14V,输出电压Vout=5V; Iout 为后续负载需求电流的最大值,其值为1.5A;ΔIL是电感里纹波电流的变化量,一般取Iout的20%~30%,因此可取ΔIL的范围为0.3A~0.45A ;另外,它的开关电源频率为fsw,可知由公式 fsw=1/T ;电感L为4.7uH 。
图4 车载仪表5V 开关电源电路
从电源芯片 LMR14030DQDPRRQ1的使用手册上获知其开关频率fsw为200KHz~2.5MHz,为避免fsw干扰车上收音机(收音机FM频率最高1.8MHz),因此fsw大于1.8MHz,取值2.2MHz。
输出电压波动由下面3个部分组成:
1.输出电容的ESR引起的纹波VORIPPLE
本项目VORIPPLE控制在5%*5V=0.25V以内, 根据电荷公式Q=CV=it,由图3可知,三角形阴影部分的面积就是半个周期内输出电容上的电荷增量,时间b=1/(2fsw),高为h=ΔIL/2,这里的ΔIL为电流纹波IRIPPLE,本文前半部分已说明本项目的ΔIL为0.3A~0.45A,因此有Cout*ΔV > b*h,即:
把各参数值代入上式得:
Cout > 0.1uF
2.输出电流变化ΔI引起的电压变动ΔV
这种情况属于电流跳涨时,输出电压会下降幅,但降幅一般需要控制在正常电压的5%以内,本项目ΔV为5V*5%=0.25V,但开关电源的输出电压会根据输出反馈进行调整,本项目规定的是2个周期内电源会根据输出反馈把输出电压从低压调整会正常值,意味着2周期(2T)内输出电压的下降值不得超过0.25V,考虑临界值,根据公式CV=it,有
Cout > (ΔIout * 2T)/ ΔVout
而2T=2/fsw,且设最严苛情况电流从0跳升到最大1.5A则ΔIout=1.5A,把以上各参数代入上式得:
Cout > 5.4545uF
3.负载由重载变化到轻载,引起的输出电压过冲
重载变化到轻载,电感中的能量释放引起输出电压升高,此时电压最大值设为Vf(本案例Vf为正常值的110%即5.5V),Vi为输出电压正常值5V,则有公式:
最严苛时,可假设IOH为1.5A,IOL为IOH的一半(即0.75A),而Lo为电感值4.7uH,把以上各参数代入上式可得:
Cout >1.51uF
电容需取以上3种情况下的最大值,因此Cout > 5.4545uF,因此图5中4.7uF的KTS250B475M32N0T00不符合要求。
除了以上3种因素考虑外,输出电容的成本、尺寸(关系占板空间)、额定直流电压、ESR也跟选型有关系。输出电容器的有效串联电阻(ESR)会直接影响输出纹波电压。利用电感器纹波电流和输出电容器的ESR可以简单地估测输出纹波电压,而设计时应当选用ESR尽可能低的电容器,因此有:
IRIPPLE取上限值0.45A,VORIPPLE为0.25V,可得:
输出电容必须RESR < 0.555ohm
可知图5中所有型号的电容其ESR值均符合要求,温度特性方面也均符合汽车电子的要求;
成本方面,容值越大价格也更高,因此10uF 可以不予考虑。
黑金刚备选电容:KTS250B685M32N0T00,KTS250B475M32N0T00,KTF500B685M43NHT00,KTS250B106M43N0T00
图5 黑金刚电容型号图
综上所述,经过上面几方面选型对比后,只有6.8uF的KTS250B685M32N0T00、KTF500B685M43NHT00满足要求,它们的尺寸不一样,考虑到尺寸越大价格会贵些,且尺寸越大,布线上的回流环路会越大,会导致EMC恶化,因此笔者最终选择了黑金刚的KTS250B685M32N0T00作为本项目DC-DC降压电路的输出电容。
从上述选型过程可知,KTS250B685M32N0T00能被选中,是因为它具有以下几个非常明显的优势:
(a)小尺寸。它的尺寸在几种型号中最小,可以大幅度改善EMC性能,迎合了本项目的EMC关切;
(b)容值符合性能和价格的需求。众所周知,容值越大价格一般也越贵,它的容值既切合性能要求,又在几个型号中属于比较小的容值;
(c)低ESR。它的ESR值只有0.02ohm,远远小于别的供应商同类产品,能大幅度减小输出电压波动,降低发热量;
(d)它的温度特性满足汽车电子的需要。
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描述- NIPPON CHEMI-CON (贵弥功株式会社公司, 或称:CHEMI-CON、NCC、贵弥功,俗称黑金刚)创立于1931年,总部位于日本,是铝电解电容器的顶级制造商,全球市场占有率位列首位,同时,在铝电极箔的生产方面,其产量也位居世界第一。
型号- ELXV500E□□221MJ25S,ESMQ451VSN331MR40S,APXA6R3ARA101MF61G,APXD6R3ARA560ME61G,EKY-630E□□122ML40S,EMLA350ARA330MF80G,EKY-101E□□470MJC5S,EKXN401E□□151ML35S,EKZN6R3E□□272MK16S,EKXJ401E□□560MJ50S,EKYB160E□□562ML25S,EKXJ351E□□270MJ30S,EMVY100□RA472MLN0S,ELXY630E□□330MF15D,EKZH160E□□472ML25S,EMZA160□RA331MHA0G,ESMQ451VSN271MQ40S,ELXY160E□□821MJ25S,EGXF250E□□511MJC5S,ELXY350E□□272ML40S,EKZN100E□□222MJ25S,EGPA500E□□102MK35S,ELXV160E□□562ML40S,EMVL250ARA330MF60G,EKMQ101E□□2R2ME11D,APXJ2R5ARA122MH70G,EKYA100E□□122MH20D,EMHS160□RA622MMN0S,EKWB451E□□820MM20S,EKXJ251E□□330MJ20S,EKXL401E□□680MK35S,APSW250E□□471MHB5S,EKXN401E□□680MK30S,EMZA630□RA301MKG5S,EMVY6R3□RA682MLN0S,ELXZ630E□□331MJ30S,EKZN500E□□181MH20D,HHXJ250□RA681MJC5G,EKZE101E□□391MK40S,EGPA800E□□471MM20S,EMVH250□RA681MMH0S,ESRG350E□□471MK13S,EKMQ100E□□331MF11D,EMZA350□RA331MJA0G,EKYB6R3E□□682MK30S,EGXF500E□□241MJ16S,APSG200E□□331MH08S,EKYB250E□□151MF11D,EGXF250E□□751MJ16S,ELXZ250E□□821MJ25S,EKY-100E□□392ML20S,ELXV350E□□272MM35S,ELXV160E□□272MK35S,EKRG160E□□222ML15S,EMVY100□RA681MJA0G,EKXN451E□□820MK45S,KYB系列,EKY-160E□□682ML40S,ELZA250E□□272ML20S,EKHE451E□□101ML35S,EKZM350E□□222ML25S,ELXY500E□□331MJ30S,EGVD250E□□822MMP1H,EKZE100E□□222MK20S,APXE6R3ARA122MJA0G,EMLA□□□ARA□□□M□□□G,EKMQ201VSN471MP30S,EKYC350E□□512MM30S,EMVE100□RA222MKG5S,ELXZ6R3E□□682MM20S,EGPA500E□□122ML30S,EKZE500E□□331MJ25S,EKZN800E□□181MJ20S,EKY-350E□□222MLN3S,ELBG250E□□662ALP1S,EKYB250E□□562MLP1S,EKYB800E□□122ML40S,EMLE6R3ARA101MF73G,EPAG401E□□101MU40S,ELXV500E□□561MK30S,EKZE630E□□182MM40S,EKWA421E□□560MJ50S,APXT100ARA121ME61G,EKXQ421E□□510ML20S,EGXF350E□□512MM35S,ESMQ161VSN122MR25S,EKY-800E□□121MJ20S,EKXL401E□□121MM30S,APXE4R0ARA561MH70G,SRG系列,EKYB100E□□123ML40S,EKXL421E□□680ML25S,EGXF350E□□242MM20S,EMVL160ARA471MJA0G,EKRG160E□□332MM15S,ELXV800E□□102MM40S,EKZN630E□□182ML40S,APXH160ARA390MF61G,EKMQ101ELL101MJ16S,EKZH100E□□682ML25S,EKYB100E□□562MK35S,ELXZ630E□□101MJC5S,EMHS250□RA102MKE0S,EKXJ421E□□560MK40S,EMLA250ARA100ME61G,APXJ2R5ARA821MF61G,EKHF451E□□101MK45S,EGPA500E□□821MU25S,EGPA800E□□681ML35S,ESMQ421VSN151MQ25S,HHXD630□RA220MF80G,EKY-350E□□122MK30S,EPAG201E□□151MK30S,EKMQ100E□□472MK25S,EKZE250E□□331MJC5S,EMVJ500ARA3R3MD60G,EKZN800E□□471MK30S,ELXV500E□□180MEB5D,ELXV160E□□222MK30S,EKXJ221E□□121MU25S,ELXZ6R3E□□122MJ16S,EKMQ100E□□332MK20S,EMVE100□RA331MHA0G,ESRG500E□□102MM20S,EMLE350ARA221MJA0G,ELE-160E□□470ME11D,EKXN351E□□680MJ40S,APSC□□□E□□□□□M□□□□,ELXV100E□□331MH12D,ELXV500E□□181MJ20S,ELXV800E□□560MH20D,EKYA350E□□392MLP1S,EKXN421E□□560MM16S,EKZN350E□□182MK35S,EKXJ221E□□181MK40S,EKXJ421E□□330MK30S,EKZE800E□□331ML20S,EKY-160E□□103MM40S,ELE-250E□□101MF11D,EMHS630□RA680MHA0G,ESMQ351VSN331MQ35S,EMVH500□RA101MKE0S,EKYC250E□□561MJC5S,EKY-350E□□471MJ20S,EKZE6R3E□□561MHB5D,EKY-500E□□681MK30S,ESMQ451VSN221MQ40S,EGPA250E□□332MK40S,APXG250ARA100ME46G,EMZF250ARA331MJA0G,EKZE800E□□102ML40S,APSC100E□□391MHB5S,EKYC250E□□622MM25S,EKXJ221E□□331ML45S,ELXZ500E□□122ML30S,EKZN800E□□221MJ25S,EMHB630□TR331MKN0S,ELXZ350E□□271MH20D,HHXD630□RA330MJA0G,EKXN351E□□101MK40S,EMVY250□RA101MF80G,EKXJ421E□□820MMN3S,EMVL500ARA3R3MD60G,EKXL421E□□820MU35S,ESMQ251VSN821MR30S,EKZM160E□□182MJ25S,EKXJ401E□□270MK20S,EKXN421E□□680ML20S,EKXN451E□□820MM20S,ELXV101E□□101MK20S,EKZE160E□□332MK35S,ELXZ100E□□471MH12D,EKXJ421E□□270MJ35S,EMZL500□RA221MJA0G,ELXV800E□□681ML40S,EGXF500E□□122MK35S,EMHL160□RA221MF80G,EKY-100E□□122MJ20S,ESMQ451VSN471MR45S,ELXZ350E□□272MM30S,EGPA350E□□222MM25S,ELXV630E□□560MJC5S,EMZF100ARA330ME73G,ELXZ500E□□470MFB5D,EKWB401E□□680MK30S,ELE-101E□□220MHB5D,GVA系列,MZJ系列,EGPD500E□□102ML20H,EKHE451VSN601MR40Z,EMZE250ARA470MF73G,EMZE350ARA220MF73G,EKYC350E□□222ML20S,EKYB350E□□182MK30S,ELXZ250E□□331MH15D,EMVE160ADA100MD55G,EKZH160E□□332ML20S,EKYB100E□□222MJ25S,EKY-6R3E□□392MM15S,EKWB451E□□221MM45S,KZN系列,EKMQ201E□□331MM40S,EMLF350ARA1R0MD73G,EKZN800E□□271MJ25S,EKY-350E□□331MJ16S,ELXZ500E□□471MK20S,EKZN100E□□123MMP1S,EMVE250ARA220MF55G,SME,EKZM6R3E□□272MJ25S,EKYA250E□□471MJC5S,SMG,EKZN800E□□122ML40S,EKXJ251E□□470MJ25S,EKHE421VSN351MR25Z,APSF6R3E□□821MF08S,SMH,EKHE401VSN751MQ60Z,ESMQ201VSN122MA30S,SMM,EKYC160E□□562MK30S,SMQ,EKLJ201E□□181MM25S,EKZH250E□□152MK20S,EKZE6R3E□□682ML25S,EKYA630E□□820MH15D,SMR,APXD2R5ARA221MF61G,APSG250E□□561MJB5S,EMLA350ARA221MJA0G,EGPD250E□□332ML20H,EKZN250E□□681MJ16S,EMVY800□RA331MMH0S,EKY-630E□□681ML25S,EKZE630E□□820MH15D,EGXF350E□□332MM25S,APSG250E□□121MF08S,HHXC500□RA151MJC5G,EKXL451E□□390ML20S,EKHF421E□□221ML50S,HHXC630□RA820MJA0G,EKZE630E□□821MM25S,EGXF161E□□181MK35S,APXH2R5ARA221MF61G,EMVH500ARA100MF60G,ESMR401VSN221MP35S,EKXL451E□□820MM25S,EKHF451E□□101MM25S,EKLJ451E□□820ML40S,EMVY250ARA100ME55G,ELBG250E□□642AU40S,SNX,APXE4R0ARA471MH70G,EKZH250E□□151MF11D,EGVD□□□E□□□□□M□□□H,ELXZ160E□□272MK30S,EGXF630E□□681MU25S,APXG160ARA271MH70G,EKMQ100E□□153MLP1S,APXH160ARA181MJ80G,HHXJ250□RA331MHA0G,APXH6R3ARA151MH70G,EMLE160ARA100MD73G,EMVJ250ARA330MF60G,EKZH6R3E□□682MK35S,ELXV800E□□271ML20S,APXG250ARA221MJA0G,EGPA800E□□561MM25S,EMHB250□RA821MKE0S,EKXL421E□□470MK30S,APSC2R5E□□152MHB5S,EKYA160E□□681MJC5S,AP
Nippon Chemi-Con(黑金刚)多层陶瓷电容器选型指南(中文)
描述- 日本贵弥功株式会社,自1931年创业以来,以开发铝电解电容器为出发点,并在这此基础上展开了各种电子元器件的开发工作。
型号- KTS500B155 □ 31N0T00,KTS350B685 □ 43N0T00,KTS101B225 □ 31N0T00,KTJ250B336M55BFT00,KTS101B685 □ 76N0T00,KTF101B334 □ 31NLT00,KVF101L154 □ 32NLT00,KTS501B105 □ 76N0T00,KTF101B475 □ 32NHT00,KTF25OB335 □ 32NHT00,KTD101B226M90A0B00,NTS系列,KTS101B335 □ 55N0T00,KVD101L684 □ 43A0T00,KTS350B226 □ 55N0T00,KTS350B476 □ 76N0T00,KTF251B105 □ 55NLT00,KVD500L474 □ 32A0T00,KTD250B107M80A0B00,KTS101B155 □ 32N0T00,KTF251B224 □ 32NLT00,KTD500B686M90A0B00,KTF101B155 □ 43NHT00,KVF500L154 □ 31NLT00,KVJ500L106M55BRT00,KTF250B685 □ 32NHT00,THCS系列,THD系列,KVF500L685M55HT00,KTD501B105 □ 76A0T00,KTS101B225M320T00,KTF250S335 □ 31NLT00,KVF500L475 □ 55NHT00,KTS500B106 □ 55N0T00,KTF250B106 □ 43NHT00,KTD350B476 □ 76A0T00,KTD101B476M99A0B00,KTJ101B685M55BFT00,KTD350B226 □ 55A0T00,KTD101B685 □ 76A0T00,KTD251B155 □ 55A0T00,KTD101B225 □ 43A0T00,KVD系列,KVJ101L155M55BRT00,KTS251B224 □ 32N0T00,KTD350B685 □ 43A0T00,KTD101B106M80A0B00,KTS250S335 □ 31N0T00,KTD250B227M90A0B00,KTD101B335 □ 55A0T00,KVD500L155 □ 43A0T00,KTS101B335 □ 43J0T00,KVD,KTJ350B686M76BFT00,KTD500B336M80A0B00,KTJ101B685M76AFT00,KVF,KTF101B475 □ 43EHT00,KTF101B225 □ 31NLT00,KVJ,TCD系列,KVF250L106 □ 55NHT00,NTJ系列,KTD250B336 □ 55A0T00,KTD101B335 □ 43A0T00,KTD350B335 □ 32A0T00,KTF101B105 □ 32NHT00,KVF500L685 □ 55NHT00,KTS250B475 □ 32N0T00,KTD101B685 □ 55A0T00,KTS101B334 □ 31N0T00,KTS350B225 □ 31N0T00,KTS251B103 □ 31N0T00,KTF251B104 □ 31NLT00,KTS250S226 □ 43N0T00,KTF500B155 □ 31NLT00,KVJ101L105M55ART00,KTF101B684 □ 31NLT00,KVJ250L106M55ART00,KTS101B685 □ 43N0T00,KTD500B225 □ 32A0T00,KTD500B106M550T00,KTS500B475 □ 32N0T00,KTJ500B156M55BFT00,KTS251B155 □ 76N0T00,KVJ500L335M55ART00,KTD500B156 □ 55A0T00,KTS500B105 □ 31N0T00,KTS101B224 □ 31N0T00,KTS251B105 □ 55N0T00,KTJ250B107M76BFT00,KTJ350B476M55BFT00,KTD251B106M99A0B00,KTF501B474 □ 55NLT00,KTF101B225 □ 32NHT00,KTD251B225M80A0B00,KTJ101B226M55BFT00,KVD500L685M550T00,KTF250B475 □ 32NHT00,KTD250B477M99A0B00,KTD501B564 □ 55A0T00,KTJ500B336M76BFT00,KTF251B473 □ 31NLT00,KVF101L683 □ 31NLT00,KTF250B155 □ 31NLT00,KTS250B156 □ 43N0T00,KTJ350B476M76AFT00,KTS251B474 □ 43N0T00,KVD250L155 □ 32A0T00,KTF250B156 □ 43NHT00,KTD501B474 □ 55A0T00,KVF250L334 □ 31NLT00,KTD251B156M99A0B00,KTF101B685 □ 55FHT00,KTS101B475 □ 43E0T00,KTS101B474 □ 31N0T00,KTD101B107M99A0B00,KTS250B155 □ 31N0T00,KTS251B473 □ 31N0T00,KTD500B476M90A0B00,KTD101B475 □ 43A0T00,KTS501B564 □ 55N0T00,KTD251B474 □ 43A0T00,KTJ500B336M55BFT00,KTD250B156 □ 43A0T00,KTS500B474 □ 31N0T00,KTD251B334 □ 32A0T00,KTS501B684 □ 76N0T00,KTS350B106 □ 43N0T00,KVF250L684 □ 31NLT00,KTJ250B686M76BFT00,KTD101B334 □ 32A0T00,KVJ系列,KVD250L105 □ 32A0T00,KTJ251B105M55AFT00,KVF101L474 □ 43NLT00,KVF500L334 □ 31NLT00,KVD101L105 □ 55A0T00,KTJ251B225M55BFT00,KVD101L474 □ 43A0T00,KTF350B685 □ 43NHT00,KTF101B106 □ 55NHT00,KVD250L685 □ 43A0T00,KTD500B475 □ 43A0T00,NTD系列,KVF250L475 □ 43NHT00,KTS251B155 □ 55N0T00,KTJ500B476M76BFT00,KTF350B475 □ 32NHT00,KTF251B334 □ 32NLT00,KTF350B156 □ 55NHT00,KTD251B105 □ 55A0T00,KTS101B475 □ 32N0T00,KTF250B105 □ 31NLT00,KTD500B226 □ 76A0T00,KVD101L154 □ 32A0T00,KTD500B106 □ 55A0T00,KTD251B224 □ 32A0T00,KTF350B106 □ 43NHT00,KVF250L155 □ 32NHT00,KTD101B225 □ 32A0T00,KTD350B336 □ 76A0T00,KVD101L224 □ 32A0T00,KTD250B686M80A0B00,KVF250L225 □ 32NHT00,KVJ250L226M55RT00,KTF500B474 □ 31NLT00,KTS501B474 □ 55N0T00,KTS500B106M55N0T00,KTS500B156 □ 55N0T00,KTF101B154 □ 31NLT00,KTF500B685 □ 43NHT00,THCR系列,KTS501B125 □ 76N0T00,KTF500B106 □ 43NHT00,KVF101L333 □ 31NLT00,KTJ500B226M76AFT00,KTD500B227M99A0B00,TCCS系列,KVF101L334 □ 32NLT00,KTF101B224 □ 31NLT00,KTD500B106M55A0T00,KTS500B685 □ 43N0T00,KVF101L224 □ 32NLT00,KVF250L335 □ 32NHT00,KTF250S106 □ 32NHT00,KTJ101B156M55BFT00,KTD101B155 □ 32A0T00,KVD101L334 □ 32A0T00,KTF350B225 □ 31NLT00,KTF251B474 □ 43NLT00,KTS250S106 □ 32N0T00,KTS350B156 □ 55N0T00,KTS500B106 □ 43N0T00,KTF350B155 □ 31NLT00,KVF250L105 □ 31NLT00,KVF500L224 □ 31NLT00,KTJ250B476M55FT00,KTF35OB226 □ 55NHT00,KTF250S226 □ 43NHT00,KVD500L685 □ 55A0T00,KTS250B335 □ 32N0T00,THP系列,KTD250B106 □ 43A0T00,KTF250B336 □ 55NHT00,KTF101B104 □ 31NLT00,KVF500L105 □ 32NHT00,KVD250L225 □ 32A0T00,KTS500B225 □ 31N0T00,KTS101B155 □ 31N0T00,KTS251B154 □ 32N0T00,KTF500B334 □ 31NLT00,KTD250B335 □ 32A0T00,KTF500B156 □ 55NHT00,KVF250L685 □ 43NHT00,KTF500B475 □ 32NHT00,KVD250L106 □ 55A0T00,KTD350B475 □ 32A0T00,KTD101B684 □ 32A0T00,KTF101B685 □ 43NHT00,KTJ500B156M55AFT00,KTD350B156 □ 55A0T00,KTS251B223 □ 31N0T00,KTD250B337M99A0B00,KTF500B225 □ 31NLT00,KVF250L474 □ 31NLT00,TMCS系列,KTS251B683 □ 31N0T00,KTS500B155 □ 32N0T00,KTS250B106 □ 43N0T00,TCCR系列,KTF251B154 □ 32NLT00,KTD500B685 □ 43A0T00,KTD251B685M99A0B00,KTS101B685 □ 55F0T00,TCP系列,KTS251B333 □ 31N0T00,KVF101L105 □ 55NLT00,KTJ251B155M55BFT00,KTD251B335M90A0B00,KTF101B155 □ 31NLT00,KTD251B154 □ 32A0T00,KTS350B155 □ 31N0T00,NTF系列,KTS250B105 □ 31N0T00,KTS350B475 □ 32N0T00,KTS251B225 □ 76N0T00,KTS101B106 □ 55N0T00,KTF251B333 □ 31NLT00,NTD,NTF,KVD500L225 □ 43A0T00,KTD500B157M99A0B00,NTJ,KTF501B564 □ 55NLT00,KTD501B125 □ 76A0T00,KTJ250B476M55BFT00,NTS,KTS500B226 □ 76N0T00,KTD500B15
【产品】NCC推出25V内低背小尺寸固态电容完美优化MLCC和钽电容方案 | 视频
Nipponchemi-con黑金刚推出固态电容替代钽电容,MLCC等方案,固态电容拥有超低ESR,小尺寸设计,相对MLCC或钽电容安全系数更高。一替多,可以减少板子空间设计,节约成本,优化性能等。
产品 发布时间 : 2023-11-17
升压型DC-DC转换器中高频噪声的产生原因
本文介绍“升压型DC-DC转换器中高频噪声的产生原因”。关于升压电源的输出中产生远高于开关频率的高频噪声的原因,将从“升压型DC-DC转换器的工作”、“输出电容器和布线中的电感分量”、“低边开关的输出容量和振铃”和“低边开关导通时的工作”几个角度进行说明。
设计经验 发布时间 : 2024-04-12
黑金刚铝电解电容&超级电容选型表
提供黑金刚(Nippon Chemi-Con)铝电解电容以及超级电容产品选型。安装方式分为贴片型(SMD),引线型(Radial lead),基板自立型(牛角电容),螺丝端子型(Screw);常规品范围在-40℃~150℃,1000小时~20000小时寿命保证,额定电压范围在2.5V~700V;尺寸范围最小规格:贴片型电容5mm*5.2mm,容量范围从1uF~3150000000uF。
产品型号
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品类
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系列
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直径(mm)
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长度(mm)
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引脚类型
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电压(V)
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容值(uF)
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电容容差
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最小工作温度(℃)
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最大工作温度(℃)
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MOQ/SPQ(pcs)
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EGVD250ELL622MM30H
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高温品引线型铝电解电容器
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GVD Series
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18mm
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30mm
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Radial lead
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25V
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6200uF
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±20%(M)
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-40℃
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135℃
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200
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选型表 - Nippon Chemi-Con 立即选型
Nippon Chemi-Con(黑金刚)DLCAP™超级电容器选型指南(中文)
描述- 超级电容器(Electric Double Layer Capacitor)和一般的二次电池比较,可以承受大电流的充放电,是充放电周期寿命优良的蓄电器件。近年,能源问题(石油减少·消费电力减少·CO2减少·新能源的有效利用)受到了重视,作为新的用途而搭载超级电容器的探讨研究正在进行之中。此外,伴随着移动手段的电动化,混合动力汽车和燃料电池车中,以能源的有效利用为目的的超级电容器搭载的研讨也在加速进行。日本贵弥功在积极的推进以节能·低环境负荷为目的的商品化,其中,超级电容器就是环境保护型的代表性产品。日本贵弥功可提供从数十F~数千F容量范围的产品,来满足客户广泛的需求。
型号- DDXE2R5LGL401KB65S,DLCAP™DKG,DDXE2R5LGN801KBA5S,DLCAP™DXE系列,DLCAP™DKA,DDXE2R5LGN401KB65S,DLCAP™DXG系列,DDXE2R5LGN142KBF0S,DLCAP™DXF系列,DLCAP™DXG,DLCAP™DXF,DLCAP™DXE,DLCAP™DKG系列,DDKA2R5ELL500KM50T,DDKG□□□E□□□□□K□□□□,DXF系列,DDXE□□□LG□□□□K□□□□,DXG系列,DDXF2R8LGM3B2EDH2S,DXE系列,DKA,DDKA2R5ELL500KM50S,MDKA2R5T500PN1111A,DDXF□□□L□M□□□E□□□□,DKG,DKA系列,DDXG2R5LGN911EBF0S,DDKG2R7ELL500KM40T,DLCAP™DKA系列,DDXG2R5LGN301EB65S,DKG系列,DDXG□□□LGN□□□E□□□□,DXE,DXG,DXF,DDXE2R5LGN122KBF0S,MDXE7R5S131PB3111B,DDXG2R5LGN591EBA5S,DDXE2R5LGL142KBF0S,DDKA□□□E□□□□□K□□□□,MDKA150S8R3PE6111A,MDXE7R5S461PB3111B
Nippon Chemi-Con(黑金刚)电子电路用薄膜电容器选型指南(中文)
目录- 电子电路用薄膜电容器产品指南 电子电路用薄膜电容器产品标准
型号- FHACB102V684J2LEZ0,HACB3C682J,FTACD801V474JELHZ0,FTACD3B1V156JTLJZ0,HACB3G822J,HACB3A394J,HACD3E104J,FHACD252V223JRLQZ0,TACB2G154J,TACD3A224J,TACD3A684J,TACD3A333J,FTACB801V473JDLCZ0,FTACD401V225JELHZ0,FTACD501V225JELHZ0,TACD2G824J,FHACD1C2V183J0LGZ0,FHACD202V332JKLDZ0,HACD3D123J,TACD 系列,TACD2G185J,HACB3C223J,FTACD801V275JTLJZ0,FTACB401V224JDLCZ0,FTACB801V105JFLEZ0,FTACD102V564JFLEZ0,HACD3A823J,FTACB401V185JFLEZ0,TACB2G155J,TACD3A334J,FHACB3B2V682JLLQZ0,HACB3G183J,FTACD102V683JDLCZ0,FTACB801V104JHLGZ0,HACD3D473J,FHACB102V473J0LGZ0,FTACB801V394JELHZ0,HACB3A154J,FHACB202V183J1LHZ0,HACD3C274J,FHACE631N684J1A1S0,TACD2J104J,TACD2J564J,HACB2J824J,TACC2K275J,TACB2F394J,HACD3B184J,HACD3D472J,FHACD631V563J0LGZ0,HACB3C334J,FHACD631V124J0LGZ0,FHACD402V153JRLQZ0,HACB3C683J,FHACB631V124J0LGZ0,FTACD401V274JDLCZ0,FHACD1C2V394J2LEZ0,HACD3C273J,FHACB162V273J1LHZ0,FHACB102V274J2LEZ0,TACD2J105J,TACD2J565J,TACD3A683J,TACB2F395J,HACD3B824J,FTACD801V155JFLEZ0,TACC2J825J,HACB3C333J,HACB3C224J,FTACB3B1V395JFLEZ0,FHACD3B2V393JRLQZ0,FHACB162V394J4LJZ0,FHACD252V823JRLQZ0,FTACC801V685JULWZ0,FHACB1C2V183J0LGZ0,HACB3F822J,FTACD102V274JELHZ0,FHACD162V334J2LEZ0,HACD3B823J,FTACC451V106JRLFZ0,FTACD801V184JHLGZ0,HACB2J184J,HACB3F183J,FTACD401V224JDLCZ0,FTACD251V125JDLCZ0,FHACD202V823J2LEZ0,HACB3B223J,HACB2J823J,HACB3G272J,FHACD102V473J0LGZ0,FTACD102V125JFLEZ0,FTACD102V124JHLGZ0,FHACD202V274JTLJZ0,HACD3B183J,FTACD102V823JDLCZ0,FTACD801V105JFLEZ0,FTACD801V185JFLEZ0,FTACC451V126JTLJZ0,FHACB162V683J1LHZ0,TACB2F155J,HACB3B684J,FHACB1C2V154J2LEZ0,HACB3B333J,HACB3B224J,HACB3B683J,FHACD162V224J2LEZ0,FHACB1C2V823J1LHZ0,HACD3D274J,FHACD102V333J0LGZ0,HACD3C184J,FTACD3B1V275JELHZ0,FTACB631V185JFLEZ0,FHACD102V394J1LHZ0,HACB3B334J,FHACD3B2V473JRLQZ0,HACD3D273J,FTACC801V395JRLFZ0,HACD3C183J,TACB2K823J,HACB2J474J,FHACD102V824J2LEZ0,FTACD3B1V186JTLJZ0,HACD3C823J,FTACB3B1V565JFLEZ0,FHACD252V683JRLQZ0,TACD2E225J,FTACB631V105JFLEZ0,FHACB3B2V103JLLQZ0,FTACB3B1V274JDLCZ0,FTACE102N684JHAHS0,TACD2E685J,FTACD801V335JTLJZ0,TACB2G224J,TACB2K824J,FHACD202V683J2LEZ0,FHACB202V222JKLDZ0,HACB2J124J,HACD3C822J,TACB2G684J,FTACD401V334JDLCZ0,TACB2K184J,TACD2E335J,FHACB102V824J4LJZ0,HACD2J154J,FHACD162V683J1LHZ0,FHACD402V123JRLQZ0,HACB3A223J,HACB3A683J,FHACD1C2V474J2LEZ0,FHACD402V183JRLQZ0,FTACD801V394JELHZ0,TACB2G334J,TACB2G225J,FHACB631V184J1LHZ0,FHACB202V822JKLDZ0,FTACC631V565JRLFZ0,FTACB631V563JDLCZ0,FHACD102V823J0LGZ0,TACC3A155J,FHACB1C2V564J4LJZ0,HACD2J155J,FHACB631V474J2LEZ0,FHACB631V563J0LGZ0,HACB3A333J,HACB3A224J,HACB3A684J,FTACD102V334JELHZ0,FHACD102V154J1LHZ0,FTACC631V685JTLJZ0,FHACB202V224J4LJZ0,FTACB401V155JFLEZ0,TACB2G335J,HACB2J473J,FHACB102V154J1LHZ0,TACB2E106J,HACD3G392J,FTACD631V475JTLJZ0,FTACB251V156JTLJZ0,HACD3D184J,TACC2W685J,TACD3A154J,HACB3A334J,HACD3D823J,TACD2F225J,FTACD3B1V684JDLCZ0,FTACD102V224JELHZ0,FHACB402V472JLLQZ0,FHACB202V392JKLDZ0,FTACB631V474JELHZ0,TACB2E105J,TACD2F334J,TACD2F685J,HACD3G153J,FHACD162V333JKLDZ0,TACB2E565J,HACD3D183J,FTACD251V685JFLEZ0,TACB2J823J,FHACB3B2V273JLLQZ0,FHACD1C2V104J1LHZ0,FHACD252V473JRLQZ0,TACD2F226J,TACD2F335J,FTACD801V125JFLEZ0,HACD3D822J,FTACD631V155JFLEZ0,FTACD801V823JDLCZ0,TACB2E564J,FHACB202V332JKLDZ0,FHACB202V683J2LEZ0,FHACB162V333J1LHZ0,TACB2F224J,TACB2F684J,FTACD401V565JFLEZ0,TACB2J824J,HACB3G123J,FTACD501V564JHLGZ0,FHACD102V105J2LEZ0,FHACD162V273JKLDZ0,HACB2J274J,FHACD202V682JKLDZ0,HACB3D183J,FTACC631V395JRLFZ0,HACB3D823J,HACB3F273J,TACB2F225J,FHACB3B2V822JLLQZ0,FHACD162V223JKLDZ0,FTACB801V334JELHZ0,FHACD1C2V823J1LHZ0,FHACB162V224J2LEZ0,TACB2F334J,TACB2F685J,TACB2J184J,HACB3D182J,HACB3D822J,FTACB631V274JHLGZ0,TACB2E126J,TACD2F684J,FHACD402V682JRLQZ0,FHACD202V183JKLDZ0,HACD3F393J,HACD2J394J,FTACD401V395JFLEZ0,TACB2F335J,FTACB801V824JFLEZ0,HACB3G472J,FTACD3B1V824JDLCZ0,FHACD202V103JKLDZ0,FTACD3B1V125JHLGZ0,FTACE631N105JDADS0,FHACB402V272JLLQZ0,FTACD801V824JELHZ0,HACD3G472J,FTACB801V224JELHZ0,FHACB1C2V104J1LHZ0,FTACB251V685JFLEZ0,FHACD162V124J2LEZ0,FHACD202V392JKLDZ0,TACD2G335J,FTACD102V474JELHZ0,TACD2E156J,TACC2J335J,FHACB402V682JLLQZ0,HACD3F273J,HACB3G562J,TACB2J394J,FHACB3B2V153JLLQZ0,FTACD3B1V335JELHZ0,FTACB801V125JFLEZ0,FTACB401V475JTLJZ0,FTACD631V395JTLJZ0,FTACD3B1V225JELHZ0,TACD3A823J,HACB3D184J,HACB3F123J,FTACD401V105JHLGZ0,HACD3A104J,HACD3A564J,FHACB1C2V184J2LEZ0,HACD3A563J,TACC2J685J,FTACB251V275JELHZ0,HACD2J683J,FTACB801V823JDLCZ0,TACD2G225J,HACB3G103J,TACD2G334J,TACD3A184J,TACD2G685J,FTACE401N685JEAES0,TACB2J395J,FHACB102V683J0LGZ0,FTACD3B1V564JDLCZ0,HACD3B105J,HACD3G123J,FHACD102V683J0LGZ0,HACB3C183J,HACB3D272J,FTACC631V335JRLFZ0,HACD3A125J,TACB2K154J,HACD2J224J,HACD2J684J,FHACB102V104J1LHZ0,FHACB202V274J4LJZ0,FHACD252V393JRLQZ0,HACB3C823J,TACD2G224J,TACD2G684J,FTACC451V186JULWZ0,HACD3B564J,FTACE631N225JEAES0,FTACD631V275JFLEZ0,FHACD202V334JTLJZ0,FTACE631N335JEAES0,FTACB401V394JHLGZ0,FHACD1C2V125JTLJZ0,FTACC451V565JRLFZ0,FTACB801V563JDLCZ0,HACB3F472J,TACC3A225J,FTACB3B1V185JELHZ0,HACD2J334J,TACC2W156J,TACD2K394J,HACB3C822J,FTACD3B1V126JFLEZ0,FTACC102V225JULWZ0,FTACD102V154JHLGZ0,TACD2E155J,HACD3
黑金刚MLCC多层陶瓷电容选型表
提供黑金刚(Nippon chemi-con)多层片式陶瓷电容(MLCC)产品选型。安装方式分为贴片型(SMD),引线型(Radial Lead),金属盖型(Metal Cap),常规品范围在-55℃~150℃(X7R-X8L),额定电压范围从25V~500V,容量范围从0.01uF~470uF
产品型号
|
品类
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系列
|
直径(mm)
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长度(mm)
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高度(mm)
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引脚类型
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电压(V)
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容值(uF)
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电容容差
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最小工作温度(℃)
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最大工作温度(℃)
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KTS250B105K31N0T00
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贴片型MLCC
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NTS Series
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3.2mm
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1.6mm
|
1.8mm
|
Chip
|
25V
|
1uF
|
±10%(K)
|
-55℃
|
125℃
|
选型表 - Nippon Chemi-Con 立即选型
电子商城
品牌:Nippon Chemi-Con
品类:Aluminum Electrolytic Capacitors
价格:
现货: 200,000
品牌:Nippon Chemi-Con
品类:Aluminum Electrolytic Capacitor
价格:
现货: 200,000
现货市场
服务
满足150W内适配器、PD快充、氮化镓快充等主流产品测试需要;并可查看被测开关电源支持协议,诱导多种充电协议输出,结合电子负载和示波器进行高精度测试。测试浪涌电流最大40A。支持到场/视频直播测试,资深专家全程指导。
实验室地址: 深圳 提交需求>
可定制平板变压器、主变压器的开关频率2MHz以内、输入电压1400V以内、输出电压1400V以内,50%以上的产品采用自动化生产,最快3天提供样品、7天交货。
最小起订量: 3000 提交需求>
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