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Sunlord SPH4018H470MT
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- Sunlord SPH4018H470MT
- Type
- SUNLORD
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- SUNLORD
- Electronic Component
- SPH4018H470MT
- Electronic Component
- 1
- Package
- SMD
- Electronic Component
- Power Inductor
- Electronic Component
- ±20%
- Electronic Component
- 0.008g
- Inductor
- 47uH
- Electronic Component
- 1
- Electronic Component
- BM0258491069
- Current
- 500mA
- Resistor(DCR)
- 744mΩ
- Electronic Component
- Electronic Component
- Electronic Component
- 3000
- and Current(Isat)
- 570mA
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
SPH4018H470MT 产品概述
一、产品简介
SPH4018H470MT 是顺络（Sunlord）推出的一款功率型贴片电感，封装为 SMD，物理尺寸约 4×4 mm，标称电感值 47 μH，公差 ±20%。该型号面向中低电流的开关电源和滤波应用，具有较高的饱和电流特性，适合空间受限的电源设计。
二、主要参数一览
- 电感值：47 μH（±20%）
- 额定电流：500 mA（工作电流参考值）
- 饱和电流（Isat）：570 mA（超过此值电感急剧下降）
- 直流电阻（DCR）：744 mΩ
- 封装：SMD，4×4 mm
- 品牌：Sunlord / 顺络
三、电气性能说明
- 电感与直流偏置：在有直流偏置电流时，电感值会随电流增加而下降，应在实际工作条件下测试以确认有效电感。
- DCR 与功耗：直流电阻 744 mΩ 在额定电流 500 mA 时的直流损耗约为 P = I^2·R = 0.5^2×0.744 ≈ 0.186 W，设计时需考虑该部分发热对周围元件及 PCB 的影响。
- 饱和特性：Isat = 570 mA 表示当电流接近或超过此值时磁芯趋于饱和，电感值会快速下降，可能导致输出纹波增大或控制环路不稳定。
四、典型应用场景
- 降压（Buck）/升压（Boost）转换器的小功率储能元件
- 电源输入或输出滤波（LC 滤波）抑制纹波和干扰
- 电池供电设备、便携式仪器、物联网节点的电能管理模块
五、选型与使用建议
- 额定电流留有裕量：为避免磁饱和与过热，实际工作电流建议低于额定电流，尽量保持在额定值的 70%–80% 范围内。
- 注意热管理：DCR 较高时在高占空比或持续大电流工况会产生明显热量，应通过加大铜箔面积或采用散热措施降低温升。
- 考虑电感容差与频率响应：±20% 容差在要求精确电感值的滤波或谐振电路需谨慎使用，必要时在电路中留可调元件或筛选样品。
六、封装与焊接建议
- 推荐按照厂家给出的 PCB 焊盘尺寸布局，并采用符合电子制造标准的回流焊工艺。
- 焊接后避免机械应力集中，贴片区域应有均匀铜皮以利散热；对于高频开关电源，可在附近配置热铜通孔以改善热流向下层铜箔。
七、典型电路兼容性提示
- 与电感配套的电容、开关器件应满足相应电压和电流能力，滤波环路需评估谐振频率与阻尼，避免在工作频率附近发生不利共振。
- 在做电路仿真或样机测试时，应使用实际电感在 DC 偏置下的曲线而非静态标称值，以获得更精确的纹波与稳定性预估。
总结：SPH4018H470MT 是一款适合中低功率电源与滤波场景的 47 μH 功率贴片电感，特点是体积小、工作电流适中。选型时关注直流电阻导致的功耗与饱和电流限制，合理布线与热管理可显著提高可靠性与效率。
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