A novel level-shift LDMOS （lateral double-diffused metal oxide semiconductor） structure with the HV （high voltage） -interconnection for a 600 V-HVIC （high voltage integrated circuit） on thick SOI （silicon on in...A novel level-shift LDMOS （lateral double-diffused metal oxide semiconductor） structure with the HV （high voltage） -interconnection for a 600 V-HVIC （high voltage integrated circuit） on thick SOI （silicon on insulator） is proposed. There are two original points in the proposed structure. One is the formation of the double floating p-layers under the HV-interconnection to prevent potential distribution in the drift from disturbing due to the HV-interconnection, and the other is a good combination between the LDMOS structure and multiple trench isolation to obtain the isolation performance over 600 V. From the proposed structure, the high blocking capability of the LDMOS, including both off- and on-breakdown voltages over 600 V and high hot carrier instability, and the isolation performance over 1,200 V can be obtained successfully. This paper will show numerical and experimental results in detail.展开更多
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....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.展开更多
A new structure of a lateral n-MOST and a new level-shifting structure with multiply metal rings （MMRs） by divided RESURF technique have been proposed. The device and electrical performances of the structure are ana...A new structure of a lateral n-MOST and a new level-shifting structure with multiply metal rings （MMRs） by divided RESURF technique have been proposed. The device and electrical performances of the structure are analyzed and simulated by MEDICI. In comparison to the level-shifting structure with multiply floating field plates （MFFPs） used before, the structure stated here improves the reliability and diminishes the voltage difference between the voltage of the power supply of the high-side gate driver and the voltage of the output terminal of the level-shifting structure, which is also that of the input terminal of the high-side gate driver. The maximal voltage difference of the level-shifting structure in this paper is 30% lower than that used before. Therefore, good voltage isolation and current isolation are obtained. The structure can be used in the level-shifting circuit of various applications.展开更多
A new quasi-three-dimensional （quasi-3D） numeric simulation method for a high-voltage level-shifting circuit structure is proposed. The performances of the 3D structure are analyzed by combining some 2D device struc...A new quasi-three-dimensional （quasi-3D） numeric simulation method for a high-voltage level-shifting circuit structure is proposed. The performances of the 3D structure are analyzed by combining some 2D device structures; the 2D devices are in two planes perpendicular to each other and to the surface of the semiconductor. In comparison with Davinci, the full 3D device simulation tool, the quasi-3D simulation method can give results for the potential and current distribution of the 3D high-voltage level-shifting circuit structure with appropriate accuracy and the total CPU time for simulation is significantly reduced. The quasi-3D simulation technique can be used in many cases with advantages such as saving computing time, making no demands on the high-end computer terminals, and being easy to operate.展开更多
针对扩展移相控制下混合三电平双有源桥直流电/直流电(Direct current direct current,DC-DC)变换器普遍存在回流功率大、动态响应慢、鲁棒性不强等问题,提出一种基于输出电压动态矩阵控制与卡罗需-库恩-塔克条件(Karush-Kuhn-Tucker,K...针对扩展移相控制下混合三电平双有源桥直流电/直流电(Direct current direct current,DC-DC)变换器普遍存在回流功率大、动态响应慢、鲁棒性不强等问题,提出一种基于输出电压动态矩阵控制与卡罗需-库恩-塔克条件(Karush-Kuhn-Tucker,KKT)实现回流功率优化的混合控制策略。建立了传输功率数学模型,对回流功率特性进行分析,并推导了在不同工作模式下实现最小回流功率的最优移相比组合;从预测模型、滚动优化和反馈校正三个步骤阐述了动态矩阵控制预测电压实现过程,提高系统的动态性能。最后,通过与传统扩展移相控制以及传输功率误差最小控制进行比较,仿真和试验结果表明,所提控制策略可以在全功率范围内实现回流功率的优化,同时也改善了变换器的动态响应性能,验证了该方法的正确性与有效性。展开更多
模块化多电平直流变压器(modular multilevel DC transformer, MMDCT)作为直流电网中的关键设备,承担了直流电压变换、功率传输和电气隔离的功能,而其稳定运行需要对众多级联的子模块采取电压均衡控制。针对现有方法无法简单可靠地实现...模块化多电平直流变压器(modular multilevel DC transformer, MMDCT)作为直流电网中的关键设备,承担了直流电压变换、功率传输和电气隔离的功能,而其稳定运行需要对众多级联的子模块采取电压均衡控制。针对现有方法无法简单可靠地实现宽电压增益范围和全功率运行工况时的子模块电容电压平衡问题,提出了一种桥臂内子模块电容均压的控制方法。该方法通过改变各子模块驱动脉冲占空比的方式实现类两电平调制,基于不同占空比的驱动脉冲向子模块电容进行电荷量不等的充电控制,并根据电容电压的排序来确定相应子模块驱动脉冲的占空比,进而实现子模块电压均衡。所提方法使得MMDCT能够运行在宽电压增益范围和全功率运行工况下,且具有无需实时检测桥臂电流、计算量少等优点。最后通过仿真和实验验证了理论分析的正确性和所提均压方法的可行性和有效性。展开更多
文摘A novel level-shift LDMOS （lateral double-diffused metal oxide semiconductor） structure with the HV （high voltage） -interconnection for a 600 V-HVIC （high voltage integrated circuit） on thick SOI （silicon on insulator） is proposed. There are two original points in the proposed structure. One is the formation of the double floating p-layers under the HV-interconnection to prevent potential distribution in the drift from disturbing due to the HV-interconnection, and the other is a good combination between the LDMOS structure and multiple trench isolation to obtain the isolation performance over 600 V. From the proposed structure, the high blocking capability of the LDMOS, including both off- and on-breakdown voltages over 600 V and high hot carrier instability, and the isolation performance over 1,200 V can be obtained successfully. This paper will show numerical and experimental results in detail.
基金supported by the 2011 PhD Programs Foundation of the Ministry of Education of China(No.20110185110003)
文摘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.
基金supported by the National Natural Science Foundation of China (No. 50777005)
文摘A new structure of a lateral n-MOST and a new level-shifting structure with multiply metal rings （MMRs） by divided RESURF technique have been proposed. The device and electrical performances of the structure are analyzed and simulated by MEDICI. In comparison to the level-shifting structure with multiply floating field plates （MFFPs） used before, the structure stated here improves the reliability and diminishes the voltage difference between the voltage of the power supply of the high-side gate driver and the voltage of the output terminal of the level-shifting structure, which is also that of the input terminal of the high-side gate driver. The maximal voltage difference of the level-shifting structure in this paper is 30% lower than that used before. Therefore, good voltage isolation and current isolation are obtained. The structure can be used in the level-shifting circuit of various applications.
基金supported by the National Natural Science Foundation of China(No.50777005)the Young Foundation of University of Electronic Science and Technology of China(No.JX0832)
文摘A new quasi-three-dimensional （quasi-3D） numeric simulation method for a high-voltage level-shifting circuit structure is proposed. The performances of the 3D structure are analyzed by combining some 2D device structures; the 2D devices are in two planes perpendicular to each other and to the surface of the semiconductor. In comparison with Davinci, the full 3D device simulation tool, the quasi-3D simulation method can give results for the potential and current distribution of the 3D high-voltage level-shifting circuit structure with appropriate accuracy and the total CPU time for simulation is significantly reduced. The quasi-3D simulation technique can be used in many cases with advantages such as saving computing time, making no demands on the high-end computer terminals, and being easy to operate.
文摘针对扩展移相控制下混合三电平双有源桥直流电/直流电(Direct current direct current,DC-DC)变换器普遍存在回流功率大、动态响应慢、鲁棒性不强等问题,提出一种基于输出电压动态矩阵控制与卡罗需-库恩-塔克条件(Karush-Kuhn-Tucker,KKT)实现回流功率优化的混合控制策略。建立了传输功率数学模型,对回流功率特性进行分析,并推导了在不同工作模式下实现最小回流功率的最优移相比组合;从预测模型、滚动优化和反馈校正三个步骤阐述了动态矩阵控制预测电压实现过程,提高系统的动态性能。最后,通过与传统扩展移相控制以及传输功率误差最小控制进行比较,仿真和试验结果表明,所提控制策略可以在全功率范围内实现回流功率的优化,同时也改善了变换器的动态响应性能,验证了该方法的正确性与有效性。
文摘模块化多电平直流变压器(modular multilevel DC transformer, MMDCT)作为直流电网中的关键设备,承担了直流电压变换、功率传输和电气隔离的功能,而其稳定运行需要对众多级联的子模块采取电压均衡控制。针对现有方法无法简单可靠地实现宽电压增益范围和全功率运行工况时的子模块电容电压平衡问题,提出了一种桥臂内子模块电容均压的控制方法。该方法通过改变各子模块驱动脉冲占空比的方式实现类两电平调制,基于不同占空比的驱动脉冲向子模块电容进行电荷量不等的充电控制,并根据电容电压的排序来确定相应子模块驱动脉冲的占空比,进而实现子模块电压均衡。所提方法使得MMDCT能够运行在宽电压增益范围和全功率运行工况下,且具有无需实时检测桥臂电流、计算量少等优点。最后通过仿真和实验验证了理论分析的正确性和所提均压方法的可行性和有效性。
