WMSIC Electronic Components

BOURNS SRP1770TA-101M

ModelSRP1770TA-101M
PackageSMD,17.8x16.9mm
BrandBOURNS
Price Price on request Electronic component prices change quickly with market supply and demand. Please refer to the latest WMSIC quotation for current pricing.
Configuration
1 options
Configuration Option 61328

Availability on request

Technical data

Product details

19 specifications

Core information

Product name
BOURNS SRP1770TA-101M
Type
BOURNS
Minimum package
200 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
BOURNS
Electronic Component
SRP1770TA-101M
Electronic Component
1
Package
SMD,17.8x16.9mm
Electronic Component
Power Inductor
Electronic Component
±20%
Electronic Component
11.983g
Inductor
100uH
Electronic Component
1
Electronic Component
BM0265158213
Electronic Component
AEC-Q200
Current
5.3A
Resistor(DCR)
118mΩ
Electronic Component
Electronic Component
Electronic Component
200

For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.

SRP1770TA-101M 产品概述

一、主要参数与型号信息

SRP1770TA-101M 是 BOURNS 推出的表面贴装功率电感器,型号后缀“101”表示电感值为 100 µH,标称精度 ±20%。主要电气参数包括:额定电流 5.3 A、饱和电流(Isat)12 A、直流电阻(DCR)118 mΩ;封装为 SMD,外形尺寸约 17.8 × 16.9 mm,符合 AEC‑Q200 车规等级,适合汽车与高可靠性工业应用。

二、结构与封装特性

该器件采用功率级磁芯与较粗铜绕线设计,以支持较大的直流通流能力和能量存储。SMD 形式便于自动贴装(SMT)与回流焊工艺,体积在同类高感量功率电感中属中等尺寸,适合对占板面积与散热有一定要求的电源模块设计。

三、电气性能解析

  • 电感值:100 µH(±20%),适用于较低开关频率或需要大储能的降压拓扑。
  • 额定电流 5.3 A:这是在规定温升和散热条件下的连续允许电流,应以此进行长期热可靠性评估。
  • 饱和电流 12 A:当电流接近或超过 Isat 时,电感量会显著下降,器件进入饱和,因而 Isat 提供了瞬态或过载裕量 —— 约为额定电流的 2.2 倍。
  • 直流电阻 118 mΩ:用于估算直流铜损,近似功耗 P ≈ I_rms^2 × DCR。举例:若连续通过 5.3 A(假设为近似 RMS),直流损耗约为 3.3 W(仅作为估算),因此散热和热阻设计必须考虑此功耗。

四、损耗与热管理要点

高 DCR 意味着在高直流电流下会产生较大热量。设计时应:

  • 评估实际电流的 RMS 值(包含纹波),而非仅用直流平均值;
  • 预留温升裕度,必要时采用散热铜箔、加厚焊盘或外壳散热路径;
  • 在并联或选型上权衡感值、DCR 与 Isat,必要时选择低 DCR 或更大尺寸的替代件。

五、可靠性与车规等级

产品满足 AEC‑Q200 车规等级,表明器件通过了汽车级环境应力与热循环测试,适用于车载电源、车身控制单元及对可靠性要求高的工业控制场景。但在实际车规应用中,仍建议参考厂商完整数据手册进行高温老化、耐振动和冲击验证。

六、典型应用场景

  • 汽车电子:车载点烟器/USB 电源、车载点火控制及车身电子模块的降压滤波与储能;
  • 工业电源:中低频开关电源(尤其需要大储能的降压电路)、电源滤波与噪声抑制;
  • 电池供电系统:作为能量存储元件用于稳压与限流场合。

七、选型与布局建议

  • 确保连续工作电流低于额定电流,并为瞬态峰值电流留足 Isat 余量;
  • 若系统纹波电流大,应计算 RMS 损耗并评估热管理;
  • PCB 布局:增大焊盘与铜厚,优化散热路径,靠近散热面或热沉布置;避免在热源附近叠放敏感元件;
  • 制造工艺:遵循厂商推荐回流焊温度曲线与焊盘设计,避免过冲回流导致磁性质损失或机械应力。

八、结论

SRP1770TA-101M 为一款面向汽车级与高可靠性电源应用的 100 µH 功率电感器,具有较高的饱和电流裕量(12 A)与中等额定电流(5.3 A)。其较高的 DCR 要求设计者在使用时重视功耗与散热。适合需大储能且对尺寸、车规可靠性有要求的降压与滤波场合。最终设计请以 BOURNS 官方数据手册为准,并在目标系统环境下做全面电热验证。

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