电子镇流器中部分低压电路的分析与设计

【作者】 韦光萍；

【导师】 陈星弼；

【作者基本信息】 电子科技大学 ， 微电子学与固体电子学， 2005， 硕士

【摘要】 高频电子镇流器作为一种重要的节能产品,已经越来越受到广泛重视。国际上出现了用智能功率集成电路(Smart Power Integrated Circuit,缩写SPIC)作荧光灯镇流器的产品,例如IR 公司的IR215X 系列等。本课题的主要研究工作是根据陈星弼教授所提出的优化横向变掺杂技术[US-PATENT 5,726,469],设计耐压大于450V,电流大于0.5A 的新型的与CMOS 兼容的、具有浮动盆和高低侧功率器件的SPIC,以实现高低压集成,降低SPIC 的成本。本文主要工作是完成电子镇流器中低压控制电路的电路设计、版图设计和部分器件的设计,并根据几次流片的结果,对原电路进行分析和改进。其中主要介绍以下几个部分:一、介绍了一个两管能隙基准源和一个三管能隙基准源电路,首先分析了其工作原理,然后运用cadence 进行计算机模拟,最后经过流片发现问题,并作了进一步改进;二、给出该课题中所需要的低压电源电路的实现方法和分析结果并介绍了一种基本的迟滞比较器;三、为了防止误触发和降低系统功耗,进行了欠压封锁电路的设计;四、提出了SPIC 中一种新的过流保护的方法。更多还原

【Abstract】 As an important energy-saving product, the high-frequency electronic ballast is more and more attracted in many countries. Many International states have made fluorescent lamp ballast using Smart Power Integrated Circuit (SPIC), such as IR corp.’s IR215X series products. The advantage of SPIC is high-reliability, but the high-cost will be a bottleneck to progress. In our project, we use the patent of Xingbi Chen instead of the method of medium insulation or pn junction insulation (that is not using international BCD technology). We use the method to make high-voltage (power) device and low-voltage CMOS or BiCMOS circuit in the same chip, which makes the cost of SPIC falling. The primary work of this paper is to analyze and design low voltage control circuits, part of devices and layout of electronic ballast. The low voltage control circuits include bandgap reference, low voltage supply, under voltage lockout, over current protection. All these circuits were simulated with Cadence. After taped out, the mistakes of circuits were analyzed again and corrected.更多还原