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SMNR4018-470MT是顺翔诺(SXN)推出的一款小型化磁胶屏蔽功率电感,专为低功耗、紧凑空间的电子设备设计,具备稳定的储能性能、低电磁干扰(EMI)和高可靠性,广泛应用于便携式消费电子、物联网(IoT)等领域。
该电感的参数针对低功耗场景优化,关键指标如下表所示:
参数项 规格值 核心说明 电感值 47uH ±20% 满足多数DC-DC转换的储能需求 额定电流(Irms) 570mA 连续工作不影响性能的最大电流 饱和电流(Isat) 570mA 电感值下降30%时的电流(与额定一致,稳定性佳) 直流电阻(DCR) 845mΩ(典型值) 降低铜损,减少功耗与发热 封装类型 SMD(4x4x2mm) 小型化表面贴装,适配紧凑PCB 屏蔽类型 磁胶屏蔽 抑制电磁辐射,减少周边干扰 工作温度范围 -40℃ ~ +85℃ 适应宽环境温度场景参数优势:额定电流与饱和电流一致,避免了常规电感“额定电流远低于饱和电流”导致的性能浪费;低DCR设计比同规格电感平均降低10%铜损,提升电源转换效率。
磁胶屏蔽技术
采用磁胶封装替代传统金属屏蔽,在抑制EMI的同时,降低了电感重量与成本。测试显示,其电磁辐射强度比非屏蔽电感低30%以上,适合蓝牙、传感器等对EMI敏感的设备。
小型化高密度设计
4x4x2mm的封装体积仅为常规功率电感的60%,可直接集成到TWS耳机、智能手环等设备的高密度PCB中,无需额外占用空间,解决了小型设备“空间紧张”的痛点。
低损耗工艺
通过优化磁芯材料(采用高饱和磁通密度的铁氧体)和线圈绕制(多股漆包线紧密绕制),实现了低DCR与高电感稳定性。在电池供电设备中,可有效延长续航时间10%左右。
高可靠性
顺翔诺采用标准化生产流程,电感的焊接可靠性(符合IPC标准)、振动稳定性(可承受5g/10-2000Hz振动)均满足工业级要求,适合长期稳定工作。
该电感的性能匹配以下常见场景:
便携式消费电子
物联网(IoT)传感器节点
小型电源模块
车载小型电子
电流匹配
电路最大连续工作电流需≤570mA,瞬时脉冲峰值需≤饱和电流(570mA),避免电感饱和导致输出电压波动。
电感值验证
若电路需精准电感值(如±10%),需谨慎选型;若为一般电源滤波,±20%精度可满足需求。
贴装工艺
EMI优化
高频(>1MHz)DC-DC电路中,可在电感两端并联100nF~1μF陶瓷电容,进一步降低电磁辐射。
SMNR4018-470MT凭借小型化、低损耗、高屏蔽性等优势,成为低功耗电子设备的可靠选择,可平衡性能与空间需求,适配多数便携式、物联网及小型电源场景。
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