共查询到20条相似文献,搜索用时 46 毫秒
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基于ToPSWich的新型高压直流电源 总被引:1,自引:0,他引:1
TopSWitch器件及特性 TopSwitch是美国PowerIntegrations公司从1994年起推出的开关电源新器件,它把脉宽调制(PWM)控制器与耐压700V的功率开关管MOS-FET合二为一集成到一块芯片上,大多采用TO220三脚封装,通过漏极D、源极S和控制极C与外电路相连,如图1. 相似文献
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In order to reduce the chip area and improve the reliability of HVICs,a new high-voltage level-shifting circuit with an integrated low-voltage power supply,two PMOS active resistors and a current mirror is proposed.The integrated low-voltage power supply not only provides energy for the level-shifting circuit and the logic circuit,but also provides voltage signals for the gates and sources of the PMOS active resistors to ensure that they are normally-on.The normally-on PMOS transistors do not,therefore,need to be fabricated in the depletion process.The current mirror ensures that the level-shifting circuit has a constant current,which can reduce the process error of the high-voltage devices of the circuit.Moreover,an improved RS trigger is also proposed to improve the reliability of the circuit.The proposed level-shifting circuit is analyzed and confirmed by simulation with MEDICI,and the simulation results show that the function is achieved well. 相似文献
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《Electron Device Letters, IEEE》1986,7(5):311-313
A new channel-doping technique for high-voltage depletion-mode double-diffused MOSFET (DMOSFET) is demonstrated. The technique that is used is channel doping performed at the surface of the laterally diffused body region in a self-aligned manner. Decrease of the breakdown voltage due to decrease of the threshold voltage is successfully prevented by using the new technique. A 1050-V DMOSFET was experimentally fabricated with a negative threshold voltage of -2 V. 相似文献
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随着电子产品功能的日益复杂和性能的提高,印刷电路板的密度和其相关器件的频率都不断攀升,工程师面临的高速高密度PCB设计所带来的各种挑战也不断增加.除大家熟知的信号完整性(SI)问题,Cadence公司高速系统技术中心高级经理陈兰兵认为,高速PCB技术的下一个热点应该是电源完整性(PI)、EMC/EMI以及热分析. 相似文献
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Gang-Long Chang Ming-Jang Lin Liaw C.W. Huang-Chung Cheng 《Electron Device Letters, IEEE》2004,25(8):547-549
A new low-temperature polysilicon high-voltage LDMOS (LTPS HVLDMOS) using excimer laser crystallization has been proposed for the first time. However, in order to enhance LTPS HVLDMOS characteristics, there are two starting points: 1) integrate the thin-film technology with the power device, and 2) clarify the requirement of excimer laser treatment for low-temperature power devices. As the result, the on/off current ratio after laser treatment is improved over 106 times than that before laser treatment at L/sub drift/ = 15 /spl mu/m and V/sub ds/ = 25 V. The LTPS HVLDMOS after laser treatment also demonstrates the better tradeoff between the specific on resistance and breakdown voltage against the previous high-voltage thin-film transistors (HVTFTs) by solid-phase crystallization - such as semi-insulating (SI), metal field-plated, and offset-drain HVTFTs. 相似文献
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A novel planar accumulation channel SiC MOSFET structure is reported in this paper. The problems of gate oxide rupture and poor channel conductance previously reported in SiC UMOSFETs are solved by using a buried P+ layer to shield the channel region. The fabricated 6H-SiC unterminated devices had a blocking voltage of 350 V with a specific on-resistance of 18 mΩ.cm2 at room temperature for a gate bias of only 5 V. This measured specific on-resistance is within 2.5× of the value calculated for the epitaxial drift region (1016 cm-3, 10 μm), which is capable of supporting 1500 V 相似文献
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随着移动电话、笔记本电脑、数码相机、摄录像机、MP3播放机等便携装置的迅速发展,对电源和电源管理提出了更高的要求。电源系统面对: 相似文献
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Elizabeth K. Adams 《International Journal of Network Management》1994,4(2):99-103
OMNIPoint is the industry's way of reducing customer and vendor risk in integrated management by fostering cross-sector agreements, by testing those agreements against user requirements and by encouraging the development of critical enabling technologies. 相似文献