摘要
研究了LDMOS器件内部的最高温度与开关频率之间的关系.结果表明:在较高频率工作时,器件内部的最高温度与器件的热容、功耗、占空比和连续工作时间有关,而与器件的热阻和信号周期无关,器件会一直处于升温状态;在较低频率工作时,器件内部的最高温度还与器件的热阻和周期有关.所得结果可作为功率器件在各种频率下工作时热安全工作的参考.
The relation between the maximum temperature and the switching condition of an LDMOST under different fre-quencies is studied. The results show that the maximum temperature in the device depends on the thermal capacitance, the power dissipation,the duty cycle, and the duration of continuous operation under a high switching frequency. Under a low switching frequency, the maximum temperature depends not only on those four parameters, but also on the thermal resistance and the period of the cycle. The results given here can be used as a reference for designing the thermal safe operation condi-tions of power devices.
基金
国家自然科学基金资助项目(批准号:60476036)~~
关键词
热安全工作
最高温度
开关频率
thermal safety
the maximum temperature
switching frequencies
