如何为降压应用选择合适的Buck转换器和控制器？

时间： 2024-06-29 来源：SCT芯洲科技公众号

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技术文章 | 如何为降压应用选择合适的Buck转换器和控制器？

01 DCDC降压稳压器是什么

DC-DC电源中常用的降压稳压器，依靠两个功率开关管来执行开关功能。开关管在控制器的驱动作用下，以一定的占空比交替在电感里存储能量并释放给负载。一般从芯片是否集成了开关管来区分DCDC降压稳压器：降压转换器（集成功率开关管）和降压控制器（外置功率开关管）。

图1 SCT2A23降压电路

降压转换器如图1由一颗SCT2A23芯片、一个功率电感L1及输入输出电容，构成了100V输入转换成12V输出的降压电路，功率开关管集成在了芯片内部，如图2所示HS、LS。

图2 SCT2A23 芯片内部框图

降压控制器如图3所示，芯片内部无功率开关管。

图3 SCT82A30 降压控制器内部框图

如图4所示，降压控制器内部只有控制电路，故而叫控制器。需外加功率开关管才能构成一个完整的降压电路：由SCT82A30、两个功率开关管Q1和Q2、功率电感L1及输入输出电容，构成了100V输入转换成5V输出的降压电路。

图4 SCT82A30 降压电路

02 转换器与控制器的应用特点

同步Buck转换器与控制器到底孰优孰劣涉及诸多考量，如功率需求、空间约束、成本控制等。

实际应用中，转换器主要用于较高电压转换至较低压的输出，比如12/24/48V转5V,5V转1.2V/1.8V等。这类应用下，下管会有更长的导通时间，因此下管比上管更低的Rdson设计，有利于均衡上下管所产生的导通损耗和覆盖大部分应用需求。如图5 SCT2A23，上管Rdson是530mΩ，下管Rdson是220mΩ。

图5 SCT2A23部分参数

因此对于某些大占空比输出特殊应用场合时，由于内部MOS固定，转换器可能不能实现标称的最大电流能力输出。控制器则可根据应用需求灵活选择不同的外置MOSFET，调整上下管的功率损耗分配。

03 如何正确选择Buck控制器的功率MOS

功率MOS作为Buck系统功率路径的阀门与功率损耗的承载者，选好功率开关管对电源系统的高效稳定运作十分重要。这需要系统效率/温升情况/空间尺寸/成本等多维度综合考虑。

1、功率MOS的耐压

MOS管的漏源耐压需要大于开关节点的最大关断震荡尖峰电压，这需要考虑最大输入DC电压下的SW节点尖峰电压V_SW_{_}_PEAK=V_IN_{_MAX}+V_NOISE如图6仿真值

在初步选项时，通常耐压可以先以V_DS>120%×V_{IN_}_MAX的安全裕量进行考虑。噪声电压V_NOISE是由功率环路寄生杂感在快速的di/dt开关变化下产生，调试时可以通过减缓开通关断速率或增加RC吸收的方式降低，确保V_SW_{_}_PEAK在MOSFET安全耐压内。

图6 开关节点电压尖峰

2、控制器驱动MOS的损耗分析

为确定MOSFET是否适合某一应用，需要先计算其功率损耗和温升情况，再去考虑哪些关联参数可以优化。首先，MOSFET上产生的总损耗P_Total=导通P_CON+开关损耗P_SW如图7两部分能量损耗：

图7 MOSFET功率损耗构成

导通损耗P_CON通过欧姆定律即可得出，D为导通占空比：（1）

上管开关损耗依据如下公式，开通与关断分别是在电感电流的谷值和峰值进行动作（2）

开关MOS管的开启关断过程如下图8所示，开关过程的损耗发生在电流电压的极速变化区间，从栅极电压升至V_GS_{_th}阈值电压到米勒平台结束的时间，记作tf，从米勒平台开始到栅极降至V_{GS_th}阈值电压的时间，记作tr。

图8 MOSFET开通关断过程

tr和tf是与控制器的内部驱动参数和外置MOS的特性参数相关，如图9所示的驱动环路，其计算可根据电荷量公式Q=I×t近似得出（3）

图9 控制器驱动MOSFET的驱动环路

式中RG为控制器驱动端外部串联到MOSFET栅极的驱动电阻。RON_H和RON_L分别是控制器驱动端内部的导通漏源阻抗，如下图截取控制器SCT82A30电气性能表格中列出的Gate Driver值。

因此，MOS管的总栅极电荷量Qg、开通阈值电压VGS_th、驱动器内部的漏源阻抗R_ON以及驱动电压VDD，对MOS管在高速开关过程中的开关损耗有较大的影响。

下管的开关瞬态过程损耗，主要是死区时间内体二极管的续流损耗，损耗值

P_{SW_L}可由（4）

其中t_{LGD_DT}和t_{HGD_D}_T分别是上管导通时的死区时间和下管导通时的死区时间。在规格书中分别是25ns和22ns。

确认极限应用时的内部结温（热阻）

除了损耗，需要对器件进行热评估，初步判断所选MOS管的结温情况能否满足所需，确保结温限制在一定安全裕量。不同的热特性参数（热阻）描述的是因损耗产生的热在不同传播路径的阻抗(如图10)。

图10 封装器件热传递路径

两节点之间的温度差（ΔT）=两点之间的热阻值Rθ×在器件上的总损耗PTotal；

初步评估通常使用热阻值RθJA（结温到环境温度的热传递路径）和RθJC（结温到器件壳表面中心热传递路）（5）

SCT82A30是一颗5.5V-100V输入的同步降压控制器，可以提供驱动端2.3A和3.5A栅极拉罐电流能力，有效降低对外置MOSFET结电容等参数的要求，实现大功率大电流场景应用。内部提供7.5V稳压源，用于驱动外部MOSFET开通于合理的线性区；

图11 外部供电VCC图示

芯片可选两种外部电源供电为VCC供电，降低了芯片在高输入电压时内部LDO耗散的功率, 降低发热，提高系统整体效率。当EXTVCC超过4.7V时关闭内部LDO、接通到VCC。如图12在48V/72V应用时，使用外部EXTVCC带来13%效率提升。

图12 SCT82A30外部供电效率差异

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华冠半导体（HGSEMi）半导体器件选型指南

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目录- 耐高压LDO IC和LDO IC 带使能LDO IC 可调输出LDO IC 三端稳压IC DC-DC 升压/反压IC DC-DC降压/变换IC 低电压检测IC(复位IC) 看门狗电源监测IC 单节锂电线性充电IC/太阳能供电的单节充电IC 电池充电IC 锂电保护IC 电压基准源IC 运放/比较器IC 恒压恒流控制IC 逻辑电路IC 模拟开关IC PWM控制IC I2C实时时钟/日历IC RS232接口IC LED驱动IC 单通道直流有刷马达正反转驱动IC 7/8路达林顿驱动IC 全极性/单极性低功耗霍尔IC

型号- HM7533HMR,HM5450BPR,HM5054B,HM1509HV-3.3,HM5208系列,HM5633BPR,HM7818M5,HM74HC 系列,HM117系列,HM4115MR,HM5501,TL494,HM6216A25PR,HM6234B09M5,HM7345HBPR,HM61N11MR,HM6226P50MR,HM1084T50/TO-252,HM7850PR,HM7818MR,DW03系列,HM2676系列,HM7328HBM5,HM74HC,HM5501DR,HM61C50MR,HM5501系列,HM1156B28DR,HM61N22MR,HM61N45MR,HM5054B系列,HM116A,HM6214系列,HM7328HBMR,HM56XXB系列,HM4057系列,HM432系列,HM7345HBMR,HM73XXN,HM7530HBMR,HM1156B15DR,HM5055DR,HM2940T50,HM4310,HM118系列,HM4115B/ESOP8,HM4313,HM6382P50PR,HM5056R,HM7533MR,HM1235B33PR,HM6235P28MR,HM61N33MR,HM4057D8,HM7336HBM5,HM61N10MR,HM4051A,HM61C09MR,LM393系列,HM6226系列,HM6214P18MR,HM8563S,HM6214P50PR,HM6234B09MR,HM5450BMR,LM2596HVT-12V,HM7828M5,HM6206P18PR,HM7330HBPR,HM6206P28MR,HM1156,HM5511,HM61N44MR,HM61N21MR,HM73XXHB系列,HM6226P30PR,HM4057DR,HM8563M,HM7336HBMR,HM1084T50/TO-220,HM431系列,HM4056系列,HM75XXH,HM62783A,LMV321,HM6234B09PR,HM1558系列,HM61C40MR,HM7850M5,HM1234B28MR,HM5511系列,HM6226P18MR,HM2676HV-12V,HM7542HPR,HM61N36MR,HM75XXHB,HM1235B30DR,HM78LXX,HM117D,HM6206系列,HM317K/1.5A/TO-252,HM7328HBPR,HM4275系列,LM358,HM7530HBPR,HM5430BM5,HM5056ES,HM7518HPR,HM5055系列,HM3232,LM358-18V,HM7840PR,HM6226P50PR,HM7850MR,HM62784A,HM4054E,HM8805,HM61N24MR,LM321,HM6216系列,LM324,HM6214P28MR,HM6214P18PR,HM6234B18MR,HM7660系列,HM7530HPR,HM5418BMR,HM9921,HM1084,HM5633BMR,HM9922,HM9923,HM7550T,LM2596HVS-12V,HM4115,HM6206P18MR,HM5208,HM61N12MR,HM4055H,HM61N35MR,HM78MXX,HM465系列,HM6206P50PR,HM992X系列,HM1235B33M5,HM1156B25DR,HM6234B18M5,HM7333N,HM61C30MR,LM339,HM73XX系列,HM6382B36M5,HM1156B18MR,HM5056系列,AMS1117,HM5431,HM9910,HM5418BM5,HM5430,HM5633BM5,HM6216A25MR,HM5056D8,HM74HC595D,AMS1117T18PR,HM4056E,ULN2004A系列,HM1235B25M5,HM7315HBMR,HM4054系列,HM6219系列,HM6219B28MR,HM809,HM2676HV-5.0,HM2675HV,HM6235P30PR,HM75XX系列,HM5056R系列,HM7320HBPR,LMV358,HM61C42MR,HM4056HA,HM78MXX系列,HM4056HA系列,HM74HC245T,HM1232系列,HM61N30MR,JRC4558,HM5155系列,HM317D/1.0A,HM7315HBM5,HM7340HBPR,HM6208系列,HM6214P15MR,HM6214P28PR,HM7350NPR,HM6206P15PR,HM6206P25MR,HM5056RD8,HM2940系列,HM7840M5,HM6226P28MR,HM6382P27PR,HM6226P18PR,LM393,LM2576HVS-12V,HM61C20MR,L9110系列,HM6206P25PR,HM6206P12MR,HM5501MR,HM74HC138D,HM1156系列,HM1156B30MR,HM7830PR,AMS1117T18B,HM7840MR,LM2596系列,LM2576系列,HM61N40MR,HM1235B12M5,LM258,HM6234B10PR,HM5636BPR,HM6245P30PR,HM6216A30MR,HM1509HV-12V,HM1084TA/TO-263,HM1558,HM6382P28PR,LM339系列,HM7340HBMR,HM809R,HM809S,HM6234B30MR,HM78LXX系列,HM2676HV-3.3,HM4057D系列,HM61C21MR,HM5450BM5,HM6214P25MR,HM809T,HM6214P15PR,HM4051AD,HM2675HV系列,HM61N系列,HM6206P15MR,HM7820MR,HM6206P28PR,HM7833PR,HM1156B18DR,HM6216A33MR,HM7350N,HM61C44MR,HM2676,HM6382P27MR,HM6234B30M5,HM7340HBM5,HM1235B15M5,HM7315HBPR,HM61C33MR,HM61C10MR,HM7320HBMR,HM78L05,HM4115B系列,HM7320HBM5,HM6245P33PR,HM5431系列,HM317D/1.5A,HM61N20MR,HM4056HA/SOT-,HM3232系列,HM61C22MR,L9110,HM6382系列,HM6216A33PR,HM1509E-5.0,HM1509-ADJ,HM5636BMR,HM5636BM5,HM116系列,HM61N,LM2576HVT-12V,HM7830M5,HM6234B30PR,HM61C45MR,HM61C,HM6226P15MR,HM6226P28PR,HM7336HBPR,HM6382P28MR,LM2596S-12V,DW03/SOT-25,JRC4558系列,HM61C11MR,HM78M05,HM6214P12MR,HM1235B33DR,HM6235P30MR,HM4056HA（单灯闪烁）,HM7533HPR,HM75XXH系列,HM7830MR,HM1232,HM5430系列,HM1234,DW03,JRC4580,MC34063系列,HM809系列,HM1235,HM61N42MR,HM1509E-ADJ,HM7820PR,HM29151,HM29152,LM2596S-ADJ,HM4115B,HM5430D4,HM1235B25DR,HM6234B36MR,HM7822MR,HM7845MR,HM7833M5,HM7333HBMR,AMS1117T12B,HM7330PR,LMV321系列,LM258系列,HM7325HBMR,HM6226P12MR,HM6234B15PR,LM2576HVS-3.3,HM61C35MR,HM61C12MR,HM4313系列,HM54XXB系列,HM6234B36M5,HM4056HA/SOT-25,HM29151系列,HM6234B25MR,HM7333HBM5,HM5055,HM5056,AMS1117T25B,HM56XXB,HM7833MR,HM6382P33MR,HM61C系列,LM2596S-5.0,HM3232T,HM1509-5.0,ULN2803A系列,HM6234B12MR,HM5433BM5,HM1156B30DR,HM6234B25PR,HM317/1.5A/SOT-223,HM1084T33/TO-263,HM61C24MR,HM7318HBPR,HM7550HMR,HM1234B30MR,HM1235B28M5,HM8541系列,HM6235P33PR,AMS1117TAB,HM6214P12PR,HM6214P33MR,HM73XX,HM61N18MR,DW03/SOT23-3L,HM1235系列,ULN2804A系列,HM9910系列,HM1084T33/TO-252,HM61C36MR,HM5433BMR,HM1156B12MR,HM5650BPR,HM6206P33PR,HM1235B12DR,HM317,HM6206P20MR,HM7822PR,ULN2803A,HM432,HM7845PR,HM6382B30M5,HM7820M5,HM431,HM6219B40MR,LM321系列,HM6226P25MR,HM7325HBM5,HM6226P15PR,HM6226P33MR,HM1509,HM61C25MR,LM358系列,HM7550HBPR,LM2596HVT-5.0,HM4051AD系列,HM6216A30PR,HM8563系列,HM5650BMR,HM7350NMR,ULN2804A,HM1084TA/TO-252,HM6382P36PR,HM1234系列,HM78XX系列,AMS1117系列,HM5052MR,HM6226P12PR,HM6234B36PR,HM1084系列,LM324系列,HM7350PR,HM7350HBMR,HM1235B15DR,HM7825PR,HM29152S,HM29151S-5.0V,HM6235P25PR,LM2576HVT-3.3,HM5511B,HM61N09MR,HM116MR,HM2940,LM2596S-3.3,HM1509-3.3,HM4070D8,HM74HC04D,HM6234B33MR,HM6234B10MR,HM3171.0A/SOT-223,HM61N50MR,HM5433BPR,HM29151T-3.3V,DW03D,HM2675HVT,HM4070系列,HM2675HVS,HM7350HBPR,JRC4580系列,HM4115系列,HM1084TA/TO-220,HM6206P33MR,HM7333HBPR,HM462,HM7333HMR,HM29151S-3.3V,HM465,HM7836PR,HM2676HV-ADJ,HM8805系列,HM7533HBMR,HM6234B10M5,HM7550HBMR,HM5650BM5,HM61C15MR,HM6234B12PR,LM2596HVS-ADJ,HM4070DR,HM1156B33MR,HM117,HM118,HM6206P15VR,HM6206P45MR,HM317系列,HM116,HM1235B18M5,HM1509系列,LMV358系列,HM6206P12PR,HM6234B33M5,HM7845M5,HM7822M5,HM232,HM7350MR,HM4057HDR,AMS1117T15B,HM4057H系列,HM6382P36MR,HM7533HBPR,HM1156B28MR,HM61C27MR,HM4275S,HM6234B28M5,HM7518HMR,HM5630BPR,HM6214P30MR,HM11

选型指南 - 虹茂半导体 - 2023/1/13 PDF 中文下载

哈弗酷狗前装50W车载无线充电模块采用南芯科技SC8701Q同步升降压控制器，支持宽范围输入和输出电压

本文主要介绍了南芯科技有关于其芯片在前装50W车载无线充电模块的应用，并介绍了多方案产品应用的优势

产品发布时间 : 2024-10-25

芯洲科技针对POE交换机应用提供非常丰富的电源管理产品，一站式设计完成POE交换机的电源架构

芯洲科技可为适用于任何前端适配器的PoE交换机提供广泛的电源解决方案，包括升压控制器（Boost Controller）、降压控制器(Buck Controller)、中高压降压转换器(Buck Converter)。芯洲科技针对POE交换机应用，具有非常丰富的电源产品，尤其是60V和18V降压转换器不同电流的覆盖范围非常广，同时也在提升性能、保护功能等上做了优化。

应用方案发布时间 : 2023-07-30

【应用】芯洲科技为智能座舱/ADAS/OBC提供车规级电源管理芯片，轻松解决EMI及过流保护等痛点问题

芯洲科技近期上线10多款车规电源芯片产品：LDO、降压变换器、升压/升降压/反激控制器、MOS管驱动、功率保护器件、集成PMIC产品等。为智能座舱/ADAS域应用、车载动力域、车身域等各类车载应用提供全方位的电源解决方案。

应用方案发布时间 : 2023-08-04

【IC】低压大电流Buck | 力芯微推出用于核心电源系统供电的同步降压电路ET8330A

无锡力芯微电子股份有限公司ET8330A是一款专门为便携式设备的核心电源系统供电的高效率低压大电流同步降压转换芯片，其可以为处理器、存储器、硬盘、SDD、LPDDR4/5等模块供电，持续带载能力可以达到3A以上。

产品发布时间 : 2024-10-19

虹茂半导体(HONGMAO SEMICON)IC产品参数选型指南（中文）

目录- 公司简介 LDO IC 充电IC 电子烟咪头IC 保护/监测IC 升/降/反压IC RS232接口IC DC-DC降压型LED驱动IC LED日光灯/球泡灯/台灯驱动IC 非隔离降压稳压IC(小家电电源IC) 运放IC 比较器IC 逻辑电路IC 模拟开关IC 实时时钟日历IC 驱动IC 全极性/单极性低功耗霍尔IC 三端稳压IC 通用DC-DC变换IC 控制IC 电压基准源IC 同步整流IC 达林顿驱动IC

型号- HM8805-ADJ,HM29151,HM4115A,HM29152,HM61CXX2,HM5054B,HM4115B,HM809,HM54XXBM5,HM74HC595T,HM5430D4,HM74HC245D,HM8100,HM8101,DW01A,HM2675HV,HM8008DR,HM4115ES,HM5068,HM4115MR,HM5501,HM9708A,LMV358,TL494,HM78XX,HM4056HA,HM74HC245T,HM7805,HM4051AD2,HM4057E,HM2101K,HM4057H,JRC4558,LM2596HV,HM1509B,HM1509E,HM6033,HM6032,HM6030,HM74HC164,HM5056RD,HM5501DR,HM5056RD8,HM8008MR,HM3157,HM2101,HM61NXX2,JRC4560,HM56XXB,HM5056RE,HM2741,HM2740,LM393,HM116A,HM73XXH,HM73XXN,HM5055DR,HM5501MR,HM3140E,HM74HC138D,HM8005DR,HM4310,HM73XX,HM4275,HM4313,HM6216,HM6214,HM4057D6,HM4057D8,HM4051A,LM258,ULN2003A,HM7660,LMV393,MC34063,HM56XXBM5,HM3141E,HM317,HM4024,HM9715,HM1509HV,ULN2803A,HM6206,HM432,HM1156,HM54XXB,HM431,HM8005MR,HM4051ADR,HM6208,HM4057DR,HM73XXHB,HM1558,HM5460ANZ,HM75XXH,HM78XXM5,HM5415ARA,HM1509,HM62783A,ULN2004A,LMV321,HM5430D,HM8541,HM5056DR,HM8006DR,HM6235,HM4056,HM6234,HM4057,HM4054,HM3122,ULN2804A,HM5415ABA,HM3121,HM3005,HM75XXHB,HM5052MR,AMS1117B,HM117D,LM2596,LM358,LMV331,HM78L05,HM6230,HM5056ES,HM4054K,HM3232,HM5511B,LMV324,HM6226,HM8006MR,HM62784A,HM4054E,HM4070D8,LM2576HV,HM74HC04D,LM321,HM4056A,LM324,HM2675HVT,L9110E,HM2675HVS,L9110,HM8563,HM6382,HM75XX,HM1084,HM9921,HM9922,HM462,HM9923,HM465,HM53XXB,HM2103K,HM4055H,UC3842,HM4070DR,UC3843,HM4070,HM118,LM339,HM116,HM78M05,HM5415ASA,HM5208FM,AMS1117,HM5431,HM9910,HM6245,HM5155,HM5430,HM5831,HM1232,HM1234,DW03,HM232,HM5056D8,JRC4580,HM74HC595D,HM3139,HM1235,HM809系列,HM4056E

选型指南 - 虹茂半导体 - 2023/7/15 PDF 中文下载

【应用】拓尔微同步升降压控制器助力66W快充车载充电器，支持34V输入电压，输出电压可通过编程配置

市面上出现了很多快充车载充电器，如华为、摩米士等推出了66W、100W等不同功率的车充。拓尔微TMI5700推出的同步升降压DCDC控制器可根据高于、低于或等于输出电压的输入电压进行操作。宽3.9V至28V输入。

应用方案发布时间 : 2023-02-11

【IC】南芯科技推出集成降压控制器的双端口快充SoC：SC9712A，支持双芯片协同工作，实现双C口快速充电

南芯科技推出全新集成36V高效同步降压控制器的双端口快充SoC：SC9712A，选用SC9712A可节省3颗芯片，大大精简多口快充充电器的电路设计，易于产品开发，实现双USB口（1C1A，Type C + USB A）快速充电。能为电脑、平板电脑、手机等便携式设备提供高达140W（28V 5A）的充电功率，不仅提升了用户使用体验，同时产品体积和生产成本也得到降低。

产品发布时间 : 2024-10-15

ROHM（罗姆）电源管理IC选型指南（英文）

目录- Linear Regulators Switching Regulators System Power Supply ICs Non-isolated type ACDC Controller ICs Isolated and Non-isolated Type ACDC Converter Isolated Type ACDC Converter ICs Gate Drivers Temperature Monitor Power Management Switch Wireless Power Battery Management IC Voltage Detectors (Reset ICs)

型号- BD7673AG,BU90006GWZ,BAJ0CC0FP,BD81026MUV,BA18JC5T,BD52XXFVE SERIES,BD18KA5W,BD1CIC0WHFV,BD1CIC0W,BU43XXG SERIES,BH25RB1WGUT,BD18HA3WEFJ,BD7602GUL,BU27TA2WHFV,BD82001FVJ-LB,BAJ2CC0WT,BD12IC0MEFJ-LB,BD50FA1MG-M,BD9109FVM-LB,BD15HA5WEFJ,BD50HC5MEFJ-C,BA70BC0FP,BD50FD0WHFP,BD70GA5MEFJ-LB,BD50HC5MEFJ-M,BM61M41RFV-C,BD9C301FJ,BU48XXF SERIES,BD15KA5WFP,BU1BTD2,BD30GA5MEFJ-M,BD15GC0MEFJ-LB,BD00GA5MEFJ-LB,BM2SC123FP2-LBZ,BD80C0AWFP2-C,BD50GA3WNUX,BD9P135MUF-C,BD18HC0MEFJ-M,BD46EXX1G-M,BU30TA2WNVX,BD71L4LG-1,BD30IC0W,BD95821MUV,BA50JC5T,BD70HC0WEFJ,BD00GC0MEFJ-M,BD8158FVM,BD49XXFVE SERIES,BA25BC0WFP,BD12IC0WEFJ,BD18HA3MEFJ-LB,BD53XXG-2M SERIES,BU32TD3WG,BM6112FV-C,BD87A34FVM,BM2P26CK-Z,BD30GA3W,BD90FD0W,BD52XXG-2C,BD6046GUL,BD47XXG SERIES,BD82006FVJ-M,BD10KA5WFP,BA03CC0FP,BUS1DJC0GWZ,BD433M5FP-C,BD18HC5MEFJ-M,BD90C0AFPS-LB,BU15JA2VG-C,BM2P0361K-Z,BM2P063EK-LBZ,BU30TD2,BD2066FJ-LB,BU30TD3,BAXXDD0T,BAXXDD0W,BA17805FP,BD8313HFN,BD22621G-M,BD80GA3WNUX,BDJ2FC0WFP,BH31NB1WHFV,BD2201GUL,BD6529GUL,BD750L5FP-C,BD82039FVJ,BD9D322QWZ,BD18IA5MEFJ-M,BM2P151S-Z,BD60HA5MEFJ-LB,BH29M0AWHFV,BD95514MUV,BA70BC0,BD70522GUL,BD25KA5WF,BU18JA2DG-C,BD9S200MUF-C,BD33HA5MEFJ-LB,BD3573YFP-M,BD80FD0WHFP,BD9E303EFJ-LB,BD25HA3MEFJ-M,BUXXSD2MG-M,BU29TD2,BD4271HFP-C,BD37210AMUV,BU29TD3,BD45XX1G,BD00HA5MEFJ-M,BD52XXG-2M,BD30GA3MEFJ-LB,BD9701FP,BD25GA5MEFJ-LB,BD8311NUV,BH28RB1WGUT,BU2ATD2WNVX,BU18SA4WGWL,BU32TD2WNVX,BD3539FVM,BD10IC0WHFV,BU12JA2MNVX-C,BAXXBC0,BU48XXFVE SERIES,BH18M0AWHFV,BD33C0AWFP2-C,BD9161FVM,BD18KA5WF,BD9355MWV,BD45EXX2G-M,BA17810FP,BD90C0AWFP-C,BM2P0361-Z,BD82040FVJ,BA90BC0,BD15IC0WEFJ,BD9B100MUV,BA178M07,BA178M06,BA178M09,BA178M08,BM2P241W-Z,BU34DV7NUX,BU1JTD2WNVX,BD42530EFJ-C,BD9104FVM,BD50GC0MEFJ-LB,BDJ6FD0WHFP,BA178M10,BA178M12,BA178M15,BH33RB1WGUT,BA178M10FP,BA178M18,BU46KXX2G SERIES,BD9S000NUX-C,BD90GA3MEFJ-LB,BD70FC0W,BM2P0363F,BD2069FJ-M,BU25TD3,BU25TD2,BD450M5WFP2-C,BD7F100HFN-LB,BD48XXFVE,BA178M20,BD8317GWL,BD9035AEFV-C,BA178M24,BD9P255EFV-C,BM2P051F,BD60GC0MEFJ-LB,BD3508MUV,BU46KXX2G,BD33GC0MEFJ-M,BU10TD2WNVX,BA178M10CP,BD00FC0W,BM2P101EK-LBZ,BDJ2GC0WEFJ,BU30SA4WGWL,BD81870MUF-M,BD42500G-C,BD15FD0W,BA05CC0WT,BA17810CP,BA9743AFV,BA25JC5T,BD9C401EFJ,BU25TA2WNVX,BA33DD0WT,BD30IC0MEFJ-LB,BD22641G-M,BD9B600MUV,BM2P052F,BM2P159PF,BD37A41FVM,BD50HC5WEFJ,BD87A29FVM,BD42540FJ-C,BU2JTD3WG,BD33C0AFP2-C,BM2P053F,BD33GC0MEFJ-LB,BD9874CP-V5,BU46KXX4G,BD49EXXG SERIES,BU21TD2WNVX,BD45EXX5G-M SERIES,BD25IC0W,BDJ2FC0W,BD00C0AWFP2-C,BA3259HFP,BM2P101X-Z,BA08CC0WFP,BD00FA1WEFJ,BD46EXX5G-M SERIES,BM2P054F,BDJ0GA3WNUX,BD7691FJ,BD82004FVJ-M,BD50FC0FP,BM2P060MF-Z,BD15HA5MEFJ-LB,BD50FC0W,BD60FC0WFP,BD48LXXG,BD25GA3W,BA50BC0WFP,BD18HA5WEFJ,BD9060F-C,BA15DD0WT,BA33BC0,BD2051AFJ,BU18TD2BD00HC5WEFJ,BA17809CP,BD6042GUL,BD35395FJ-M,BD80C0A,BD00FC0WFP,BD70GA3WEFJ,BHXXRB1WGUT,BD80FC0WEFJ,BD2266G-M,BM6101FV-C,BD15FD0WHFP,BD80C0AFP-C,BD82020FVJ,BD7690FJ,BD50C0AHFP-C,BDJ0GA3MEFJ-M,BD7684FJ-LB,BAJ0BC0,BA70BC0WT,BA08CC0FP,BDXXIA5,BD50C0AFP-C,BU25TD3WG,BD99950MUV,BM2P0151-Z,BD48EXXG 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选型指南 - ROHM - Edition 2022 - 2022/8/3 PDF 英文下载查看更多版本

ROHM（罗姆）电源管理IC选型指南（英文）

型号- BD60FC0W,BU90006GWZ,BAJ0CC0FP,BA18JC5T,BD1CIC0WHFV,BD18KA5W,BD9106FVM,BD3506F,BD1CIC0W,BH25RB1WGUT,BD18HA3WEFJ,BD7602GUL,BU27TA2WHFV,BAJ2CC0WT,BU18TD2/BU18TD3,BD15GA3W,BD12IC0MEFJ-LB,BD50FA1MG-M,BD9109FVM-LB,BD15HA5WEFJ,BU12SD2MG-M,BD90GC0MEFJ-LB,BD433M2WFP3-C,BA178M08CP,BAJ0BC0WFP,BD50HC5MEFJ-C,BA70BC0FP,BA90BC0T,BA90BC0W,BD50FD0WHFP,BD00FC0WEFJ,BD70GA5MEFJ-LB,BD50HC5MEFJ-M,BD9C301FJ,BD15KA5WFP,BDJ2GA5MEFJ-M,BU1BTD2,BD30GA5MEFJ-M,BD15GC0MEFJ-LB,BA80BC0,BD00GA5MEFJ-LB,BD820F50EFJ-C,BD90C0AFPS,BD80C0AWFP2-C,BD50GA3WNUX,BU26TD2WNVX,BD18HC0MEFJ-M,BU30TA2WNVX,BD80GA3MEFJ-M,BD30IC0W,BD95821MUV,BA50JC5T,BD33FC0FP,BD70HC0WEFJ,BD00GC0MEFJ-M,BD8158FVM,BA25BC0WFP,BD3574YFP-M,BD50C0A,BD12IC0WEFJ,BD750L2,BD18HA3MEFJ-LB,BD70HA3WEFJ,BD15IC0W,BU32TD3WG,BD750L5,BD30GA3W,BD90FD0W,BD9111NV,BAXXCC0W,BD15FD0WFP2,BD433M5WFP2-C,BA30BC0WT,BD50HA3MEFJ-LB,BD10KA5WFP,BA03CC0FP,BD9A100MUV,BD750L2FP3-C,BH28NB1WHFV,BD3507HFV,BH25NB1WHFV,BU27TA2WNVX,BD433M5FP-C,BD15HC0WEFJ,BD18HC5MEFJ-M,BD33KA5W,BD90C0AFPS-LB,BDJ5FC0W,BD25IA5MEFJ-M,BU15JA2VG-C,BD90GA3WEFJ,BD60FC0WEFJ,BAJ0BC0FP,BAXXDD0T,BD450M2FP3-C,BD10IA5MEFJ-LB,BH32M0AWHFV,BAXXDD0W,BA17805FP,BD18HC0WEFJ,BD90FC0WEFJ,BD8313HFN,BD9E302EFJ,BD15KA5FP,BD80GA3WNUX,BDJ2FC0WFP,BH31NB1WHFV,BD10KA5WF,BU30TA2WHFV,BD750L5FP-C,BD9D322QWZ,BD18IA5MEFJ-M,BD30FC0WEFJ,BD60HA5MEFJ-LB,BH29M0AWHFV,BD95514MUV,BA70BC0,BD25KA5WF,BD70522GUL,BD25FD0WHFP,BU15TD3WG,BU1CJA2DG-C,BU18JA2DG-C,BD800M5WFP2-C,BAJ2DD0WHFP,BD33HA5MEFJ-LB,BD3573YFP-M,BD80FD0WHFP,BU10JA2DG-C,BD9D320EFJ,BD9E303EFJ-LB,BA33BC0WFP,BDXXKA5W,BD25HA3MEFJ-M,BUXXSD2MG-M,BD37210AMUV,BD4271HFP-C,BD9327EFJ-LB,BD00HA5MEFJ-M,BA50DD0WT,BD60GA3WEFJ,BU90090GWZ,BD30GA3MEFJ-LB,BD9701FP,BAJ5CC0T,BD50HC5MEFJ-LB,BD30FD0W,BU20TD2/BU20TD3,BD15HC5MEFJ-M,BD25GA5MEFJ-LB,BD8311NUV,BH28RB1WGUT,BU2ATD2WNVX,BU18SA4WGWL,BU32TD2WNVX,BA09CC0FP,BA60JC5T,BD3539FVM,BD10IC0WHFV,BU12JA2MNVX-C,BD9B301MUV-LB,BAXXBC0,BDJ2FC0WEFJ,BD33GA3W,BH18M0AWHFV,BD33C0AWFP2-C,BAJ6DD0T,BD9161FVM,BAJ6DD0W,BD18KA5WF,BA17810FP,BD90C0AWFP-C,BDJ0GC0MEFJ-M,BA90BC0,BD15IC0WEFJ,BD9B100MUV,BA178M07,BA178M06,BA178M09,BA178M08,BH33NB1WHFV,BU34DV7NUX,BU1JTD2WNVX,BD42530EFJ-C,BA09CC0,BD9104FVM,BD33C0AW,BD50GC0MEFJ-LB,BD33KA5WF,BH27M0AWHFV,BDJ6FD0WHFP,BD33HC5WEFJ,BA178M10,BA178M12,BU25TD2/BU25TD3,BD12IA5WEFJ,BU2JTA2WNVX,BU33DV7NUX,BA178M15,BH33RB1WGUT,BU15JA2MNVX-C,BA178M18,BA178M10FP,BD90GA3MEFJ-LB,BU15SD2MG-M,BD70FC0W,BD00GA3WEFJ,BA33JC5T,BD60HA3MEFJ-M,BD750L2FP-C,BD450M5WFP2-C,BA178M20,BD9703FP,BD8317GWL,BA178M24,BD60GC0MEFJ-LB,BD3508MUV,BD33GC0MEFJ-M,BU10TD2WNVX,BA178M10CP,BD00FC0W,BD18GA5WEFJ,BU15TD2WNVX,BA60BC0FP,BD70GC0WEFJ,BDJ2GC0WEFJ,BD450M5FP-C,BA07CC0WFP,BU30SA4WGWL,BA05CC0WT,BD42500G-C,BD15FD0W,BA17810CP,BA25JC5T,BU10TD2/BU10TD3,BD9C401EFJ,BU10JA2VG-C,BU25TA2WNVX,BD18IA5MEFJ-LB,BA33DD0WT,BD30IC0MEFJ-LB,BD9B600MUV,BD60GA3MEFJ-LB,BD18GC0MEFJ-LB,BU1CTD3WG,BD3021HFP,BU28TD2/BU28TD3,BD50HC5WEFJ,BD42540FJ-C,BU2JTD3WG,BD15IC0MEFJ-LB,BA17812FP,BD33C0AFP2-C,BA90DD0WHFP,BA178MXX,BD33GC0MEFJ-LB,BD9874CP-V5,BU90008GWZ,BU21TD2WNVX,BDXXFC0W,BD25IC0W,BDJ2FC0W,BD00C0AWFP2-C,BA80BC0FP,BA3259HFP,BA08CC0WFP,BD00FA1WEFJ,BA30DD0WHFP,BDJ0GA3WNUX,BD9703CP-V5,BD50FC0FP,BD95500MUV,BA00DD0WCP-V5,BA178M12FP,BD15HA5MEFJ-LB,BA17812CP,BD30HA5MEFJ-LB,BD50FC0W,BD60FC0WFP,BD26IC0WHFV,BA00CC0WCP-V5,BD25GA3W,BD90GA5WEFJ,BA50BC0WFP,BD33GA3MEFJ-LB,BD18HA5WEFJ,BU1JTD3WG,BA15DD0WT,BA33BC0,BA09CC0WFP,BD25IC0WEFJ,BD9152MUV,BA17809CP,BD30GC0MEFJ-M,BU25TA2WHFV,BD90GA3W,BD33IC0MEFJ-M,BD35395FJ-M,BD80C0A,BD00FC0WFP,BA178M12CP,BU19TD2/BU19TD3,BD9701CP-V5,BD50C0AWHFP-C,BD70GA3WEFJ,BD8967FVM,BHXXRB1WGUT,BD80FC0WEFJ,BU31TD2WNVX,BD00IA5MEFJ-LB,BD80C0AFP-C,BD15FD0WHFP,BD33IC0MEFJ-C,BD50C0AHFP-C,BDJ0GA3MEFJ-M,BAJ0BC0,BA70BC0WT,BU18SD2MG-M,78 SERIES,BA08CC0FP,BA00BC0WFP,BDXXIA5,BD50C0AFP-C,BU25TD3WG,BU23TD2,BA06CC0,BD70GA3MEFJ-LB,BD00GA5MEFJ-M,BD90GA3MEFJ-M,BU30SA5WGWZ,BD9E100FJ-LB,BD33HA3MEFJ-LB,BU32TA2WHFV,BH30NB1WHFV,BD50GC0MEFJ-M,BH26M0AWHFV,BD9E151ANUX,BD50FC0WEFJ,BD80FD0WFP2,BU2FSA4WGWL,BD15HC5WEFJ,BD15HA3MEFJ-M,BU6652NUX,BDXXIC0,BD00HC0MEFJ-LB,BD00GC0WEFJ,BA17807,BA17808,BA17805,BA17806,BD80FC0WFP,BA17809,BH15M0AWHFV,BU30JA2DG-C,BD91361MUV,BD9E104FJ,BD00GA5WEFJ,BD33GC0WEFJ,BDJ0GA3WEFJ,BD33C0A,BDJ0GA3MEFJ-LB,BUXXSA5WGWZ,BD33GA3WEFJ,BA33DD0T,BD9325FJ,BA33DD0W,BA17810,BD50FD0WFP2,BA17815,BD90C0A,BA17812,BD00GA3MEFJ-M,BD00IA5WEFJ,BA17818,BA78M24,BA00DD0W,BD00IC0MEFJ-LB,BA78M20,BD733L2FP-C,BD70GA3MEFJ-M,BU12TD2WNVX,BD30KA5FP,BD33GA3MEFJ-M,BD30FD0WHFP,BDJ2GA3W,BA33D15HFP,BA30BC0,BU33JA2MNVX-C,BD9A101MUV-LB,BD90C0AFP2-C,BU34TD3WG,BDXXGA3,BD90C0AW,BH30M0AWHFV,BA17820,BUXXTA2W,BD50C0AWFP-C,BA17824,BA78M12,BA00CC0W,BD30GC0WEFJ,BA78M10,BA00BC0WT,BDJ2GA3MEFJ-LB,BDXXGA5,BD9102FVM,BD9A302QWZ,BD9A300MUV,BA78M18,BH2JNB1WHFV,BUXXJA2DG-C,BD9G341AEFJ-LB,BD30HC0MEFJ-LB,BA78M15,BD00HC5MEFJ-LB,BD15KA5WF,BAJ0BC0W,BD30IA5MEFJ-M,BA30JC5T,BD18IC0WEFJ,BD10KA5FP,BAJ0BC0T,BU20TD2WNVX,BA80BC0T,BA80BC0W,BA178M05FP,BD3572YFP-M,BU15TD2/BU15TD3,BD800M5WFPJ-C,BD33IC0W,BD50GA3W,BD25HC5MEFJ-M,BA78M09,BA78M08,BA17820FP,BA78M07,BD12KA5WFP,BA78M06,BU28TD2WNVX,BA78M05,BD30HC5WEFJ,BD

选型指南 - ROHM - 2022/3/28 收起

【经验】基于SGM6132降压稳压器设计的非隔离、非同步整流型降压DCDC电源转换电路，效率可达91%

基于SGM6132降压稳压器设计的非隔离、非同步整流型降压DCDC电源转换电路，效率可达91%，SGM6132是一款带内部功率MOSFET的电流模式降压稳压器。该器件可在4.5V至28.5V的宽输入电源范围内实现3A连续输出电流，并具有出色的负载动态调整率。 SGM6132的开关频率为1.4MHz，可极大的提高电源的转换效率，电流模式操作可提供快速瞬态响应并简化环路，提高稳定性。

设计经验发布时间 : 2018-07-24