【产品】采用低开关速率设计的40V系列DC-DC降压转换器，外围精简，转换效率可达94.5％

时间： 2022-05-05 来源：必易微

技术问答

随着消费者生活品质的提升，联网远程操控让带着“科技感”光环的智能家电产品成为新一代“网红”。与此同时，在“碳达峰”、“碳中和”理念引领下，伴随着物联网科技的升级，对智能家居家电产品的能效提出了更高的要求。传统低压差线性稳压器（LDO）供电方案逐渐满足不了市场需求。高效率、高可靠性、低EMI的简单易用型开关电源转换器（Buck）逐渐走进智能家居家电市场。

得益于比LDO更高的转换效率和负载能力，DC-DC降压转换器广泛应用于冰箱，洗衣机和空调等大家电产品中。必易微深耕于电源管理芯片，愿与广大工程师一起助力科技升级。必易微最新推出超精简40V系列降压转换器用于智能家居家电等领域。该系列是简单易用的同步降压直流/直流转换器，具有6V至40V的宽输入范围，能够驱动高达1A/1.8A的负载电流。

产品特点：

产品封装：

亮点1–超精简外围：

通过集成P型高侧MOSFET和N型低侧MOSFET，省掉了外部自举电容和肖特基二极管。在内部实现了软启动和补偿电路减少了外围元器件的数量，固定5V或3.3V的输出方式可进一步减少外围元器件数量，从而轻松实现单层PCB布局。

亮点2–高转换效率：

在采用DCR为230mΩ的电感下，整机仍然有优异的效率表现。常温下测试，12V输入转5V输出，最高效率达到94.5%，满载输出时产品壳温仅48.1℃。

亮点3-输入过压保护：

当输入电压瞬时超过安全阈值时将触发输入过压保护，使得产品抗电压尖峰能力更强，可靠性更高。

亮点4-优秀的EMI特性：

低开关速率设计让EMI更轻松。Demo板辐射通过EN55032 Class B标准且裕量充足。

总结：

必易微最新40V系列产品输入电压宽、外围精简，EMI性能好，可单面板布线；支持电流大，转换效率高，稳定性强，低开关速率设计尤其适用于有EMI要求的应用场合。

系列产品选型表：

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本文由天星转载自必易微，原文标题为:必易微最新推出 | 超精简 40V 系列降压转换器用于智能家居家电等领域，本站所有转载文章系出于传递更多信息之目的，且明确注明来源，不希望被转载的媒体或个人可与我们联系，我们将立即进行删除处理。

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产品型号	品类	输入电压(V)	输出电压(V)	工作频率(KHZ)	输出电流(A)	参考电压(V)	控制模式	工作模式	Features
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数据手册 - 必易微 - REV1.0 - 2023/3/31 PDF 中文下载

BD9ExxxFP4-Z、BD9E304FP4-LBZ、BD9A201FP4-LBZ 采用小型SOT23封装的节能降压型DC-DC转换器IC

型号- BD9E105FP4-Z,BD9E304FP4-LBZ,BD9A201FP4-LBZ,BD9EXXXFP4-Z

商品及供应商介绍 - ROHM - 03.2024 PDF 中文下载

必易微为电动自行车厂商提供一站式芯片解决方案，覆盖AC-DC、BMS和电机驱动IC等类别（上）

必易微可为电动自行车厂商提供一站式芯片解决方案，覆盖AC-DC、BMS、电机驱动IC、高压Buck 、LED驱动和信号链等类别，帮助客户提高产品性能和价格优势。

应用方案发布时间 : 2023-11-28

家用电器电源整体解决方案

型号- KP3282,KP21825C,KP3281,KP52X218,KP311A,KP2264H,KP311B,KP522211,KP3116,KP525208,KP525201,KP86202,KP86201,KP36572,KP36374,KP82201,KP36373,KP521405,KP522218,KP521403,KP3114,KP3112,KP3311,KP3210B,KP521403A,KP522201,KP526208,KP523211,KP81103,KP81102,KP85302,KP81101,KP85301,KP3221,KP522208,KP522405,KP3224,KP523218,KP3222,KP85309,KP2161M,KP3211B,KP2262H,KP526201,KP2126,KP321AB,KP36675,KP36674,KP36673,KP85211,KP523201,KP52X201,KP523208,KP3212B,KP52X208,KP2161,KP521405A,KP3206,KP3205,KP524201,KP85321,KP52X211,KP3284,KP524208,KP21824M

应用及方案 - 必易微 - REV1.0 - 2023/6/12 PDF 中文下载

BD9ExxxFP4-Z, BD9E304FP4-LBZ, BD9A201FP4-LBZ Compact SOT23 Package Energy-Saving Buck DC-DC Converter ICs

型号- BD9A400MUV,BD9E201FP4-Z,BD9A100MUV,BD9A301MUV-LB,BD9E105FP4-EVK-001,BD9E304FP4-LBZ,BD9A201FP4-LBZ,BD9E203FP4-Z,BD9E200FP4-Z,BD9A201FP4-EVK-001,BD9A101MUV-LB,BD9E202FP4-EVK-001,BD9E105FP4-Z,BD9EXXX,BD9E300UEFJ-LB,BD9E301UEFJ-LB,BD9AXXX,BD9E303UEFJ-LB,BD9E101FJ-LB,BD9A300MUV,BD9E302EFJ,BD9E104FJ,BD9A600MUV,BD9E304FP4-EVK-002,BD9E304FP4-EVK-001,BD9EXXXFP4-Z,BD9E202FP4-Z,BD9E100FJ-LB,BD9E304FP4-EVK-003

商品及供应商介绍 - ROHM - 03.2024 PDF 英文下载