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一种高频单片GaN DC-DC降压转换器设计
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作者 何凡 沈红伟 +1 位作者 来龙坤 罗卫军 《微电子学》 CAS 北大核心 2024年第3期417-423,共7页
基于全耗尽型(D-mode)0.25μm硅基氮化镓(GaN-on-Si)工艺,设计了一款高频单片GaN DC-DC降压转换器芯片。该芯片集成了驱动电路和半桥功率级电路,驱动电路中电平放大功能通过有源上拉结构实现,在100~200 MHz频率范围内,单片GaN DC-DC降... 基于全耗尽型(D-mode)0.25μm硅基氮化镓(GaN-on-Si)工艺,设计了一款高频单片GaN DC-DC降压转换器芯片。该芯片集成了驱动电路和半桥功率级电路,驱动电路中电平放大功能通过有源上拉结构实现,在100~200 MHz频率范围内,单片GaN DC-DC降压转换器可直接被0.7 V的高速脉冲信号控制,无需片外模块,其峰值功率级效率达到92.2%,峰值总效率达到84.24%,峰值功率为7.7 W。相较于前期工作,芯片工作范围从100 MHz提升至200 MHz,在保证芯片效率性能的情况下,实现了对工作频率的大幅提升。 展开更多
关键词 gan dc-dc降压转换器 单片电路 驱动电路 有源上拉结构
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Design of Second Order Sliding Mode and Sliding Mode Algorithms:A Practical Insight to DC-DC Buck Converter 被引量:2
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作者 Seyed Mehdi RakhtAla Monazzahalsadat Yasoubi Hassan HosseinNia 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2017年第3期483-497,共15页
This paper presents a simple and systematic approach to design second order sliding mode controller for buck converters.The second order sliding mode control(SOSMC)based on twisting algorithm has been implemented to c... This paper presents a simple and systematic approach to design second order sliding mode controller for buck converters.The second order sliding mode control(SOSMC)based on twisting algorithm has been implemented to control buck switch mode converter.The idea behind this strategy is to suppress chattering and maintain robustness and finite time convergence properties of the output voltage error to the equilibrium point under the load variations and parametric uncertainties.In addition,the influence of the twisting algorithm on the performance of closed-loop system is investigated and compared with other algorithms of first order sliding mode control such as adaptive sliding mode control(ASMC),nonsingular terminal sliding mode control(NTSMC).In comparative evaluation,the transient response of the output voltage with the step change in the load and the start-up response of the output voltage with the step change in the input voltage of buck converter were compared.Experimental results were obtained from a hardware setup constructed in laboratory.Finally,for all of the surveyed control methods,the theoretical considerations,numerical simulations,and experimental measurements from a laboratory prototype are compared for different operating points.It is shown that the proposed twisting method presents an improvement in steady state error and settling time of output voltage during load changes. 展开更多
关键词 dc-dc buck converter non-singular-terminal sliding mode second order sliding mode twisting algorithm
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Study of Sliding Mode Control of DC-DC Buck Converter 被引量:2
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作者 Hanifi Guldemir 《Energy and Power Engineering》 2011年第4期401-406,共6页
In this paper, a robust sliding mode controller for the control of dc-dc buck converter is designed and analyzed. Dynamic equations describing the buck converter are derived and sliding mode controller is designed. A ... In this paper, a robust sliding mode controller for the control of dc-dc buck converter is designed and analyzed. Dynamic equations describing the buck converter are derived and sliding mode controller is designed. A two-loop control is employed for a buck converter. The robustness of the sliding mode controlled buck converter system is tested for step load changes and input voltage variations. The theoretical predictions are validated by means of simulations. Matlab/Simulink is used for the simulations. The simulation results are presented. The buck converter is tested with operating point changes and parameter uncertainties. Fast dynamic response of the output voltage and robustness to load and input voltage variations are obtained. 展开更多
关键词 Switched-Mode Power Supplies buck converter dc-dc converter SLIDING MODE Control
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Design and Simulation of a Solar Regulator Based on DC-DC Converters Using a Robust Sliding ModeController
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作者 Gaga Ahmed Errahimi Fatima ES-Sbai Najia 《Journal of Energy and Power Engineering》 2015年第9期805-812,共8页
The MPPT (maximum power point tracking) is one of the most important features of a regulator system that processes the energy produced by a photovoltaic generator. It is necessary, in fact, to design a controller th... The MPPT (maximum power point tracking) is one of the most important features of a regulator system that processes the energy produced by a photovoltaic generator. It is necessary, in fact, to design a controller that is able to set the output value of the voltage and ensure the working within the maximum power point. In this paper, we propose the application of the robust sliding mode control technique to a DC-DC buck converter which is combined with a classical P & O (perturbation and observation) algorithm to enhance the solar system efficiency. Dynamic equations describing the boost converter are derived and a sliding mode controller for a buck converter is designed. It is shown that, this control approach gives good results in terms of robustness toward load and input voltage variations. The effectiveness of the proposed work is verified by the simulation results under PowerSim environment. 展开更多
关键词 Photovoltaic generator MPPT dc-dc converter buck converter sliding mode controller P O PowerSim.
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Fundamental Study of High Step-down Non-isolated Multicellular DC-DC Converter for Future DC Distribution Systems
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作者 Yusuke Hayashi Yoshikatsu Matsugaki Tamotsu Ninomiya 《Journal of Energy and Power Engineering》 2017年第9期605-613,共9页
A novel high step-down non-isolated DC-DC converter has been proposed. The proposed converter consists of highly efficient non-isolated cell converters using bidirectional semiconductor power devices, and these cell c... A novel high step-down non-isolated DC-DC converter has been proposed. The proposed converter consists of highly efficient non-isolated cell converters using bidirectional semiconductor power devices, and these cell converters are connected in ISOP (input series and output parallel). The non-isolated ISOP converter achieves high step-down ratio of D/N, operating N cell converters under the duty ratio olD. Availability of the proposed converter has been shown by developing the 48 V-12 V laboratory prototype using two 24 V-12 V cell converters. Design consideration for the 48 V-3 V multicellular converter using four 12 V-3 V cell converters has been also conducted, and the potential to approach the efficiency of 97% has been discussed. The proposed topology is suitable for the POL (point of load) converters in the highly efficient next generation DC distribution system for data centers. 展开更多
关键词 dc-dc converter high step-down ratio ISOP gan (gallium nitride).
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基于GaN器件Buck电路死区功耗分析与优化 被引量:2
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作者 胡官昊 陈万军 +2 位作者 施宜军 周琦 张波 《电源学报》 CSCD 2016年第4期90-95,127,共7页
氮化镓功率器件以其优异的高速、高效特性而有望在电源转换领域取得广泛应用。在Buck开关电源应用中,系统采用GaN HEMT替换传统Si功率器件后,系统死区损耗成为阻碍系统效率提升的一个重要因素。针对GaN器件的电源转换系统死区功耗展开... 氮化镓功率器件以其优异的高速、高效特性而有望在电源转换领域取得广泛应用。在Buck开关电源应用中,系统采用GaN HEMT替换传统Si功率器件后,系统死区损耗成为阻碍系统效率提升的一个重要因素。针对GaN器件的电源转换系统死区功耗展开理论及仿真讨论,详细分析Si功率器件与GaN HEMT在buck型开关电源系统中不同的工作机制以及死区时间对系统功耗的影响。优化结果表明,输入电压为12 V、输出电压为1.2 V、开关频率为700 k Hz的GaN基电源转换系统,在死区时间Td1=20 ns、Td2=0 ns、负载电流为20 A的情况下系统转换效率可达到92%。 展开更多
关键词 死区时间 氮化镓器件 同步buck型开关电源
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用于关断耗尽型GaN器件的Buck-Boost负压电路
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作者 许齐飞 毛帅 +2 位作者 冯旭东 明鑫 张波 《微电子学》 CAS 北大核心 2021年第4期487-493,共7页
设计了一种Buck-Boost负压关断电平产生电路。通过引入动态调整关断时间的计时模块、分段电流限模块和纹波高速检测模块,实现了在耗尽型GaN器件快速开关时稳定栅极负压的供给,有效消除了耗尽型GaN器件在高压应用时密勒误开启现象的发生... 设计了一种Buck-Boost负压关断电平产生电路。通过引入动态调整关断时间的计时模块、分段电流限模块和纹波高速检测模块,实现了在耗尽型GaN器件快速开关时稳定栅极负压的供给,有效消除了耗尽型GaN器件在高压应用时密勒误开启现象的发生。电路基于0.35μm BCD工艺进行设计与仿真验证。结果表明,该电路在宽输入范围内稳定输出-14 V的负压,在20~130 mA恒定负载电流下工作效率达80~87%,在0.5~1 MHz的工作频率下GaN器件栅极开关切换期间输出电压依然稳定。该电路满足高压应用需求。 展开更多
关键词 耗尽型gan buck-BOOST变换器 恒定导通时间 高速比较器
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一种GaN半桥驱动器电平移位电路设计 被引量:5
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作者 成松林 向乾尹 冯全源 《微电子学》 CAS 北大核心 2021年第1期28-32,共5页
GaN半桥输出点电压在死区时间为负值,给GaN功率器件栅极驱动电路信号通信带来了挑战。通过研究驱动器电平移位锁存电路工作状态与半桥功率级输出节点电压跳变、死区时间负压之间的相互影响,设计了一种新型的零静态功耗电平移位电路及其... GaN半桥输出点电压在死区时间为负值,给GaN功率器件栅极驱动电路信号通信带来了挑战。通过研究驱动器电平移位锁存电路工作状态与半桥功率级输出节点电压跳变、死区时间负压之间的相互影响,设计了一种新型的零静态功耗电平移位电路及其误触发消除电路。电路采用100 V BCD 0.18μm工艺设计,在输入电压100 V、开关频率5 MHz的GaN半桥变换器中对版图进行了后仿真。仿真结果表明,当半桥功率级输出节点分别为-3 V和100 V时,延时为4.5 ns和1.5 ns。 展开更多
关键词 gan驱动 电平移位电路 开关电源 dc-dc降压变换器
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一种基于氮化镓晶体管的BUCK变换器 被引量:2
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作者 谭超 王鑫 李博 《现代信息科技》 2021年第5期73-75,共3页
氮化镓(GaN)材料具有宽禁带宽度、高击穿场强等综合优势,通过对比氮化镓晶体管和硅功率器件参数,说明了氮化镓器件在工作频率和电路效率方面的优势。使用氮化镓晶体管替代硅基功率器件,设计了一款带有同步整流的BUCK变换器。测试结果显... 氮化镓(GaN)材料具有宽禁带宽度、高击穿场强等综合优势,通过对比氮化镓晶体管和硅功率器件参数,说明了氮化镓器件在工作频率和电路效率方面的优势。使用氮化镓晶体管替代硅基功率器件,设计了一款带有同步整流的BUCK变换器。测试结果显示:电路可以在较高的频率下工作,缩小了滤波电路的体积,在轻载时电路进入脉冲跳跃模式,结合氮化镓晶体管在效率方面的优势,电路整体效率均保持在较高水平。 展开更多
关键词 氮化镓 buck 电源变换器
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A low noise high efficiency buck DC-DC converter with sigma-delta modulation
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作者 蔡曙江 皮常明 +1 位作者 严伟 李文宏 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2011年第7期81-88,共8页
Some research efforts to improve the efficiency and noise performance of buck DC-DC converters are explored.A carefully designed power MOSFET driver,including a dead time controller,discontinuous current mode(DCM) c... Some research efforts to improve the efficiency and noise performance of buck DC-DC converters are explored.A carefully designed power MOSFET driver,including a dead time controller,discontinuous current mode(DCM) controller and gate width controller,is proposed to improve efficiency.Instead of PWM modulation, sigma-delta modulation is introduced into the feedback loop of the converter to move out the clock-referred harmonic spike.The proposed converter has been designed and fabricated by a 0.35μm CMOS process.Measured results show that the peak efficiency of the converter can reach 93%and sigma-delta modulation suppresses the harmonic spike by 30 dB over PWM modulation. 展开更多
关键词 buck dc-dc converter PWM modulation sigma-delta modulation DCM dead time control width control current sensing
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DCM,FSM,dead time and width controllers for a high frequency high efficiency buck DC-DC converter over a wide load range
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作者 皮常明 严伟 +1 位作者 张科 李文宏 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2010年第8期114-120,共7页
This paper presents a width controller,a dead time controller,a discontinuous current mode(DCM) controller and a frequency skipping modulation(FSM) controller for a high frequency high efficiency buck DC-DC conver... This paper presents a width controller,a dead time controller,a discontinuous current mode(DCM) controller and a frequency skipping modulation(FSM) controller for a high frequency high efficiency buck DC-DC converter. To improve the efficiency over a wide load range,especially at high switching frequency,the dead time controller and width controller are applied to enhance the high load efficiency,while the DCM controller and FSM controller are proposed to increase the light load efficiency.The proposed DC-DC converter controllers have been designed and fabricated in the Chartered 0.35μm CMOS process,and the measured results show that the efficiency of the buck DC-DC converter is above 80%over a wide load current range from 8 to 570 mA,and the peak efficiency is 86%at 10 MHz switching frequency. 展开更多
关键词 buck dc-dc converter dead time controller discontinuous current mode width controller frequency skipping modulation
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A voltage-mode DC–DC buck converter with fast output voltage-tracking speed and wide output voltage range 被引量:1
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作者 杨淼 张白雪 +2 位作者 曹允 孙锋锋 孙伟锋 《Journal of Semiconductors》 EI CAS CSCD 2014年第5期93-97,共5页
A high switching frequency voltage-mode buck converter with fast voltage-tracking speed and wide output voltage range has been proposed. A novel error amplifier (EA) is presented to achieve a high DC gain and get hi... A high switching frequency voltage-mode buck converter with fast voltage-tracking speed and wide output voltage range has been proposed. A novel error amplifier (EA) is presented to achieve a high DC gain and get high phase margin, including a resistor and capacitor net, a unit gain block and a high gain block. The investigated converter has been fabricated with GF 0.35 μm CMOS process and can operate at 6 MHz with the output voltage range from 0.6 to 3.4 V. The experimental results show that the voltage-tracking speed can achieve 8.8 μs/V for up-tracking and 6 μs/V for down-tracking. Besides, the recovery time is less than 8 μs while the load current suddenly changes 400 mA. 展开更多
关键词 dc-dc buck converter VOLTAGE-MODE voltage-tracking speed
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50 MHz dual-mode buck DC–DC converter
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作者 张章 王星 +3 位作者 余文成 谭烨 杨依忠 解光军 《Journal of Semiconductors》 EI CAS CSCD 2016年第8期85-89,共5页
A 50 MHz 1.8/0.9 V dual-mode buck DC-DC converter is proposed in this paper. A dual-mode control for high-frequency DC-DC converter is presented to enhance the conversion efficiency of light-load in this paper. A nove... A 50 MHz 1.8/0.9 V dual-mode buck DC-DC converter is proposed in this paper. A dual-mode control for high-frequency DC-DC converter is presented to enhance the conversion efficiency of light-load in this paper. A novel zero-crossing detector is proposed to shut down synchronous rectification transistor NMOS when the inductor crosses zero, which can decrease the power loss caused by reverse current and the trip point is adjusted by regulating IBIAS (BIAS current). A new logic control for pulse-skipping modulation loop is also presented in this paper, which has advantages of simple structure and low power loss. The proposed converter is realized in SMIC 0.18μm 1-poly 6-metal mixed signal CMOS process. With switching loss, conduction loss and reverse current related loss optimized, an efficiency of 57% is maintained at 10 mA, and a peak efficiency of 71% is measured at nominal operating conditions with a voltage conversion of 1.8 to 0.9 V. 展开更多
关键词 dual-mode buck dc-dc converter zero-cross detection
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