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12–48 V power tools and cordless equipment

When heavy duty lithium battery packs and brushless DC motors were first combined, no one would have guessed the impact they would have on cordless power tools let alone drones, vacuum cleaners and gardening equipment. Yet today cordless devices continue to replacing a whole range of mains-powered consumer and industrial equipment. While 12-24 V systems are still common, more and more manufacturers are switching to more powerful 36 V or 48 V systems. Of course with more power comes the need for greater safety and Nexperia’s portfolio helps provide that safety without sacrificing efficiency.

Block diagram

设计考虑因素

  • 开始采用PWM驱动无刷直流电机控制
  • 电机驱动MOSFET必须以低RDSon和良好的热阻抗来满足峰值高电流需求
  • 如果过载情况会降低电池和栅极电压,则可能需要具有强线性模式性能的MOSFET来提供反向电池保护
  • MOSFET可能需要满足UL2595等的具体间距要求
  • 为小尺寸优化的电荷平衡MOSFET,通常装在可移动电池组中——每个电池一个

功率MOSFET应用手册

依据20多年的经验,功率MOSFET应用手册综合了一套关于在实际系统中使用功率MOSFET的学习和参考资料。

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