一种市电供电白光LED驱动电路中控制芯片的设计
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摘要
白光LED以其高效、节能、环保、寿命长、易维护等优点,将逐渐取代传统的白炽灯、荧光灯成为新一代照明光源。由于它的电学参数离散性大,并且容易受温度影响,因而需要设计专门的驱动控制芯片来驱动它。
本文主要针对一种市电供电白光LED驱动电路中的控制芯片进行设计。该芯片内部集成耐高压功率管,采用峰值电流型PWM控制模式,通过输出电流和电压反馈信号,产生二次反馈电流信号,调节PWM控制器,实现恒流限压或恒压限流功能,从而实现对白光LED的驱动。文中首先根据实际应用设计芯片的整体电路框图,并结合驱动电路,分析它的工作原理。然后,基于Chrt0.35μm CMOS工艺,利用EDA工具Cadence对芯片内部的低压控制电路进行设计仿真,包括:参考电压源、基准电流源、振荡器、欠压锁定电路、过压保护电路、运算放大器、信号前沿隐匿电路、PWM逻辑电路等。接着利用Medici设计了一种耐高压700V的LDMOS功率管。最后简单介绍了一下电路的工艺实现和版图设计,并按照设计规则完成了部分模块版图的设计。
White LED is expected to become a new lighting source after the conventional incandescence lamp and fluorescence lamp with its merits including high efficiency、energy conservation、environment protection、long-life time、easy to be maintained and so on. Because its electrics parameters are unstable and sensitive to the temperature,white LED needs to be drived by special control IC.
A control IC which is applied in the white LED driver powered by 220V±20% is designed in this paper. There is a high voltage power transistor integrated inside. Peak value current PWM mode is adopted to deal with the current signal(secondary feedback)which is produced by the output current and voltage feedback signal to modulate PWM controller.Thereby,the functions constant current/restrained voltage and constant voltage/restrained current can be realized and then the function to drive LED can be realized too. In this paper,first,the whole frame plot of this IC was designed according to the practice application. In addition,the operation principle of this IC was analysed according to the driver circuit. Second,based on Chrt 0.35μm CMOS process,the low voltage control circuites were designed and simulated by Cadence which is a kind of EDA tools,including voltage and current references、OSC、undervoltage lockout circuit with hysteresis、overvoltage protect circuit、operational amplifier、leading-edge blanking circuit、PWM logic circuit and so on. Third,a 700V LDMOS device was designed by Medici. At the end,the realization of this control IC’s process and layout were introduced,and the layout of some cells were completed according to the design rule.
本文主要针对一种市电供电白光LED驱动电路中的控制芯片进行设计。该芯片内部集成耐高压功率管,采用峰值电流型PWM控制模式,通过输出电流和电压反馈信号,产生二次反馈电流信号,调节PWM控制器,实现恒流限压或恒压限流功能,从而实现对白光LED的驱动。文中首先根据实际应用设计芯片的整体电路框图,并结合驱动电路,分析它的工作原理。然后,基于Chrt0.35μm CMOS工艺,利用EDA工具Cadence对芯片内部的低压控制电路进行设计仿真,包括:参考电压源、基准电流源、振荡器、欠压锁定电路、过压保护电路、运算放大器、信号前沿隐匿电路、PWM逻辑电路等。接着利用Medici设计了一种耐高压700V的LDMOS功率管。最后简单介绍了一下电路的工艺实现和版图设计,并按照设计规则完成了部分模块版图的设计。
White LED is expected to become a new lighting source after the conventional incandescence lamp and fluorescence lamp with its merits including high efficiency、energy conservation、environment protection、long-life time、easy to be maintained and so on. Because its electrics parameters are unstable and sensitive to the temperature,white LED needs to be drived by special control IC.
A control IC which is applied in the white LED driver powered by 220V±20% is designed in this paper. There is a high voltage power transistor integrated inside. Peak value current PWM mode is adopted to deal with the current signal(secondary feedback)which is produced by the output current and voltage feedback signal to modulate PWM controller.Thereby,the functions constant current/restrained voltage and constant voltage/restrained current can be realized and then the function to drive LED can be realized too. In this paper,first,the whole frame plot of this IC was designed according to the practice application. In addition,the operation principle of this IC was analysed according to the driver circuit. Second,based on Chrt 0.35μm CMOS process,the low voltage control circuites were designed and simulated by Cadence which is a kind of EDA tools,including voltage and current references、OSC、undervoltage lockout circuit with hysteresis、overvoltage protect circuit、operational amplifier、leading-edge blanking circuit、PWM logic circuit and so on. Third,a 700V LDMOS device was designed by Medici. At the end,the realization of this control IC’s process and layout were introduced,and the layout of some cells were completed according to the design rule.
引文
[1] 王晓明、郭伟玲、高国等,LED—新一代照明光源,现代显示,2005.7(53),15-19;
[2] 蒋大鹏、赵成久、侯凤勤等,白光发光二极管的制备技术及主要特性,发光学报,2003.8.24(4),385-389;
[3] 杨安发,定电流对LED的重要性,照明功能学报,2003.9.(15),21-23;
[4] 方佩敏,白色LED驱动器的发展概况,今日电子,2005.9,54-59;
[5] 平立,白光LED驱动综述,现代显示,2006.6(64), 45-48;
[6] 周志敏、周纪海、纪爱华编著,LED驱动电路设计与应用第一版,北京,人民邮电出版社,2006年,148-152;
[7] HV9921、HV9922、HV9910的芯片资料;
[8] ST公司VIPER12A和TSM101的芯片资料;
[9] Abraham I.Pressman著,王志强等译,开关电源设计第二版,北京,电子工业出版社,2006年,1-95;
[10] 毕查德.拉扎维著,陈贵灿、程军、张瑞智等译,模拟CMOS电路设计,第一版,西安,西安交通大学出版社,2002年,309-327;
[11] Phillip E. Allen, Douglas R. Holberg 著,冯军、李智群等译,CMOS 模拟集成电路设计第二版,北京,电子工业出版社,2002 年,198-283;
[12] D.B.Ribner and M.A.Copeland,Design Techniques for Cascode CMOS Op Amps with Improved PSRR and Common-Mode Input Range,IEEE J.Solid-State Circuits,1984.12.6(19),919-925;
[13] 张志平、吴玉广,一种新型微秒级脉冲形成电路的分析和设计,电子科技,2006 年第四期,31-34;
[14] Herzel F、Behazavi B,A Study of Oscillator Jitter Due to Supply and Substrate Noise,IEEE Tran. Circuits and Systems-Ⅱ:Analog and Digital Signal Processing,1999.1.46(1),56-62;
[15] John P.Uyemura 著,周润德译,超大规模集成电路与系统导轮第一版,北京,电子工业出版社,2004 年,300-327;
[16] 刘其贵、李建中、郭振东等,CMOS 单片 LDO 线形稳压器的设计,电路与系统学报,2002.12.7(4),5-8;
[17] 邵丙铣、郑国祥编著,MOS 集成电路的分析与设计第一版,上海,复旦大学出版社,2002 年,42-45;
[18] 陈星弼,功率 MOSFET 与高压集成电路第一版,南京,东南大学出社,1990年;
[19] 陈利、李开航、郭东辉,一种使用于高低压电路单片集成的 LDMOS 器件,微电子学,2006.12.36(6),837-841;
[20] PARPLA. Optimization of RESURF LDMOS Transistors: an analytical approach. IEEE TRANS ED,1990.Vol 37,789-795;
[21] 嵇维贵、冉峰、徐美华,智能功率开关电源 IC 设计,半导体技术,2004.129(1),68-72;
[22] 陈志军、钟昌贤、张波,一种用于离线式开关电源的内部电源电路,中国集成电路,2006.8(87),18-21;
[23] 杨银堂、朱海刚,BCD 集成电路技术的研究与进展,微电子学,2006.6.36(3),315-319;
[24] Christopher Saint、Judy Saint著,周润德、金申美译,集成电路掩模设计—基础版图设计第一版,2006年,50-115。
[2] 蒋大鹏、赵成久、侯凤勤等,白光发光二极管的制备技术及主要特性,发光学报,2003.8.24(4),385-389;
[3] 杨安发,定电流对LED的重要性,照明功能学报,2003.9.(15),21-23;
[4] 方佩敏,白色LED驱动器的发展概况,今日电子,2005.9,54-59;
[5] 平立,白光LED驱动综述,现代显示,2006.6(64), 45-48;
[6] 周志敏、周纪海、纪爱华编著,LED驱动电路设计与应用第一版,北京,人民邮电出版社,2006年,148-152;
[7] HV9921、HV9922、HV9910的芯片资料;
[8] ST公司VIPER12A和TSM101的芯片资料;
[9] Abraham I.Pressman著,王志强等译,开关电源设计第二版,北京,电子工业出版社,2006年,1-95;
[10] 毕查德.拉扎维著,陈贵灿、程军、张瑞智等译,模拟CMOS电路设计,第一版,西安,西安交通大学出版社,2002年,309-327;
[11] Phillip E. Allen, Douglas R. Holberg 著,冯军、李智群等译,CMOS 模拟集成电路设计第二版,北京,电子工业出版社,2002 年,198-283;
[12] D.B.Ribner and M.A.Copeland,Design Techniques for Cascode CMOS Op Amps with Improved PSRR and Common-Mode Input Range,IEEE J.Solid-State Circuits,1984.12.6(19),919-925;
[13] 张志平、吴玉广,一种新型微秒级脉冲形成电路的分析和设计,电子科技,2006 年第四期,31-34;
[14] Herzel F、Behazavi B,A Study of Oscillator Jitter Due to Supply and Substrate Noise,IEEE Tran. Circuits and Systems-Ⅱ:Analog and Digital Signal Processing,1999.1.46(1),56-62;
[15] John P.Uyemura 著,周润德译,超大规模集成电路与系统导轮第一版,北京,电子工业出版社,2004 年,300-327;
[16] 刘其贵、李建中、郭振东等,CMOS 单片 LDO 线形稳压器的设计,电路与系统学报,2002.12.7(4),5-8;
[17] 邵丙铣、郑国祥编著,MOS 集成电路的分析与设计第一版,上海,复旦大学出版社,2002 年,42-45;
[18] 陈星弼,功率 MOSFET 与高压集成电路第一版,南京,东南大学出社,1990年;
[19] 陈利、李开航、郭东辉,一种使用于高低压电路单片集成的 LDMOS 器件,微电子学,2006.12.36(6),837-841;
[20] PARPLA. Optimization of RESURF LDMOS Transistors: an analytical approach. IEEE TRANS ED,1990.Vol 37,789-795;
[21] 嵇维贵、冉峰、徐美华,智能功率开关电源 IC 设计,半导体技术,2004.129(1),68-72;
[22] 陈志军、钟昌贤、张波,一种用于离线式开关电源的内部电源电路,中国集成电路,2006.8(87),18-21;
[23] 杨银堂、朱海刚,BCD 集成电路技术的研究与进展,微电子学,2006.6.36(3),315-319;
[24] Christopher Saint、Judy Saint著,周润德、金申美译,集成电路掩模设计—基础版图设计第一版,2006年,50-115。