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BLUE ROCKET TIP122D
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- BLUE ROCKET TIP122D
- Type
- BLUE ROCKET
- Minimum package
- 2500 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- BLUE ROCKET
- Electronic Component
- TIP122D
- Electronic Component
- 1
- Package
- TO-252
- Type
- NPN
- Electronic Component
- Darlington Transistor
- Electronic Component
- 0.448g
- Electronic Component
- 1
- Electronic Component
- BM0257582403
- Power Dissipation(Pd)
- 40W
- Electronic Component
- Electronic Component
- Electronic Component
- 2500
- Collector Current(Ic)
- 5A
- Current (h FE)
- 1000
- Voltage(Vebo)
- 5V
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
TIP122D 产品概述
一、产品简介
TIP122D 为 NPN 达林顿功率晶体管（品牌：BLUE ROCKET），采用表面贴装 TO-252（DPAK）封装，专为中大功率开关与放大场合设计。器件具有高电流放大能力和较高集电极-发射极击穿电压，适用于需要微弱驱动信号控制较大负载的场合。
二、主要电气参数
- 类型：NPN（达林顿结构）
- 集-射极击穿电压 Vceo：100 V
- 集电极电流 Ic：5 A（连续）
- 最大耗散功率 Pd：40 W（在规定散热条件下）
- 集电极截止电流 Icbo：200 μA
- 集-射极饱和电压 VCE(sat)：典型 2 V，最大可达 4 V（视工作电流与驱动情况而定）
- 直流电流增益 hFE：约 1000（达林顿结构，满足高增益需求）
- 发-基极击穿电压 Vebo：5 V
三、优势与局限
优势：
- 极高的电流增益（hFE≈1000），可用较小的基极/驱动电流控制较大集电极电流，简化驱动级设计。
- 100V 的耐压能力，使其可胜任中高电压开关场合；5A 的连续电流能力适合多数中功率负载。
局限：
- 达林顿结构固有的较高饱和压（VCE(sat) 典型 2 V，最大 4 V）会带来较大的开关损耗和发热，不利于低压大电流高效率系统。
- 基极-发射极击穿电压较低（Vebo=5V），需注意反向基极电压保护。
- 高增益易引起热失控，需要良好热管理与限流保护。
四、典型应用
- 直流电机驱动、步进电机驱动（作为高侧或低侧开关需注意饱和压影响）
- 继电器、阀门、电磁铁等功率负载驱动
- 开关电源辅助开关、功率放大级（非高效率主开关）
- 工业自动化控制与电源管理模块
五、设计与应用注意事项
- 散热：TO-252 封装需通过大面积铜箔散热或在PCB下方设置散热垫，保证在额定 Pd 下温升可控。
- 驱动：尽管 hFE 高，仍建议设计合理的基极限流与保护，避免基极反向击穿（Vebo=5V）。
- 保护电路：建议在感性负载上并联反向二极管或肖特基二极管以抑制反向高压尖峰；添加过流保护与热关断设计以防热失控。
- 并联使用应谨慎：若需并联以分担大电流，须在每只晶体管的发射极上并联小阻值平衡电阻，并保证良好热均衡。
- 开关损耗：在低压大电流场合，VCE(sat) 带来的功耗不可忽视，必要时考虑使用低饱和压或 MOSFET 替代。
六、封装与安装建议
TO-252（DPAK）适合表面贴装自动化生产，安装时注意：
- 在 PCB 放置大铜箔和过孔以提高散热能力；
- 焊接工艺控制好回流曲线，避免过热导致封装应力；
- 在布局上留出热阻传导路径并避免热源聚集。
七、采购与替代
TIP122D 以其高增益特性适用于特定驱动场合。采购时确认参数（尤其是 VCE(sat)、Pd 与散热条件）与实际使用场景匹配。若系统对开关效率与压降要求更高，可考虑功率 MOSFET 或低饱和压的双极晶体管替代。
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