TL镇流器电子驱动器VK06TL的应用

VK06TL是ST公司生产的带有控制电路和复合功率开关的TL电子镇流器驱动器。用该器件设计电子镇流器时，其灯预热频率、稳态工作频率及灯寿终定时保护等一些参数均可通过外部元件来设定。文中介绍了VK06TL的结构与特点，给出了其工作原理和典型应用电路。     

有源高功率因数电子镇流器

为了提高电子整流器的功率因数,讨论了高性能电子镇流器系统必须具备的电路结构和功率因数校正电路(PFC)的基本原理。介绍了一种以L6561为功率因数校正控制器的有源高功率因数电子镇流器,说明该镇流器的电路组成及L6561的主要特点,并给出详细的电路原理图及主要元器件的选型。     

新型电子镇流器控制芯片IR2156

文中介绍了一款低成本、高效电子镇流器控制芯片IR2156的主要特点和功能模式 ,给出了由IR2156组成的紧凑型节能灯和普通荧光灯电子镇流器的应用电路     

电子镇流器专用模块IR2157及应用

IR2175是IR公司推出的一种电子镇流器专用模块。该模块功能齐全，可完成电子镇流器的控制、驱动及多重保护。本文介绍了IR2157的功能特点、引脚功能和电气参数，最后给出了IR2157的典型应用电路及运行程序图。     

基于KA7526功率因数校正控制的电子镇流器设计

文中给出了一种采用高效功率因数校正控制器KA7526设计的低功耗、高功率密度的电子镇流器的新型电路 ,并给出了电路中各元器件的具体参数 ,同时介绍了KA7526控制器的主要特点、引出端功能和内部结构     

新型专利电子镇流器控制器BL8301及其应用

上海贝岭生产的专利电子镇流器控制器BL8301可为电子镇流器半桥LC谐振逆变器提供所有必需的控制和保护功能,可用于设计80W以下中高端荧光灯交流电子镇流器。文中介绍了BL8301的基本结构特点和功能原理,给出了BL8301的应用电路。     

基于IR51H420厚膜集成电路的超紧凑型荧光灯电子镇流器

IR51H420是IR公司在IR2151基础上推出的结构更加紧凑的荧光灯电子镇流器集成电路，它可和荧光灯一起直接插在60－100W的白炽灯座上。文中给出了一个基于IR51H420的电子镇流器实际电路及设计方法。同时给出了不同输出功率时各元器件参数的设计列表。     

电子镇流器优化设计要点

本基于电子镇流器的工作原理。结合对高功率因数．低谐波电路的研究。异常工作状态保护电路的研究，灯丝预热启动电路的研究及EMI滤波器电路等一系列的研究分析。提出电子镇流器优化设计要点。有利于电子镇流器生产厂家的规范化设计。     

简单可靠的两片式电子镇流器设计

FAN7527和KA7541分别是FairchildSemiconductor公司生产的高效低功耗PFC控制器和电子镇流器控制器。文中介绍了它们的主要特点和引脚功能 ,给出了用FAN7527进行功率因数校正 ,并选用KA7541作为荧光灯电子镇流器控制器设计的、简单、可靠且成本低廉的新型电子镇流器的电路设计方案     

基于IR21592型控制器的调光电子镇流器的原理与设计

介绍IR21592型调光镇流器控制器的特点,详细阐述基于IR21592的36 W荧光灯调光电子镇流器电路的工作原理与设计.     

A novel single-stage push-pull electronic ballast with high inputpower factor

A novel single-stage push-pull electronic ballast with high input power factor is presented in this paper. The proposed electronic ballast combines the front-end power-factor corrector and push-pull converter into a single-stage power converter. Compared to the single-stage class-D electronic ballast, the proposed circuit does not require an isolated driver. The control of the circuit is easier and the cost less. The circuit of the ballast is analyzed and the design guidelines are listed. The experimental results verify the theoretical derivation     

数字控制金卤灯电子镇流器样机设计

本文基于金卤灯电子镇流器数字控制策略分析的基础上,对其电路拓扑的主电路和控制电路进行设计,即对PFC、DC/DC、DC/AC三级结构的主电路及控制电路模型和参数进行选择、设计,并研制了一台高功率因数低频方波输出的数字控制金卤灯电子镇流器,通过对实验结果分析验证了所提出的数字控制方案是可行的。     

Single-switch electronic ballast with near-unity power factor andsoft-switching characteristic

The design and analysis of a single-switch electronic ballast with near-unity power factor and soft-switching characteristic are presented. The ballast circuit is simple and has a small component count. The experimental results for an 80 W ballast show that it has a power factor higher than 0.99 and a total harmonic distortion of 12%. The operating frequency is between 20-40 kHz. The output power is adjustable and the circuit is reliable     

Design and Implementation of a Single-Stage High-Frequency HID Lamp Electronic Ballast

We present a single-stage electronic ballast with a high power factor feature for driving high-intensity discharge (HID) lamps. A new frequency-modulation technique is proposed to eliminate the acoustic resonance problem in HID lamps under high-frequency operation. The proposed method has the merits of simple circuit and low cost; thus, it is suitable for use in commercial applications. The conducted emission caused by the high-frequency electronic ballast can be also effectively reduced. The operating principles and design considerations of the proposed electronic ballast are analyzed and discussed in detail. A 35-W laboratory prototype is designed and implemented. Simulation and experimental waveforms are given to verify the feasibility of the proposed method. The results are satisfactory.     

Self-oscillating dimmable electronic ballast

This paper presents a simple alternative for an electronic ballast operating in self-sustained oscillating mode with dimming capability for fluorescent lamps. A simple modification in one of the gate drivers side circuit allows the lamp to dim without compromising the simplicity, reliability, and low cost which characterize the self-oscillating electronic ballast (SOEB). A qualitative analysis is presented to explain the behavior of the proposed self-oscillating electronic ballast with dimming feature. In addition, the stability and the key equations for the design are derived using the extended Nyquist criterion and describing function method. Experimental results from two 40-W electronic ballasts are presented to demonstrate the performance and to validate the analysis carried out.     

Three-Phase Electronic Ballast With Current-Equalization Function

This paper proposes a three-phase electronic ballast with current-equalization function. By properly designing the resonant tank and the values of the resonant inductance and resonant capacitance, the current difference between lamps can be significantly reduced. Hence, current-equalization can be achieved by means of impedance-matching. Without an additional current-equalization circuit, the cost of the proposed circuit is reduced due to fewer components. The analysis and design of the proposed circuit will be presented in this paper. Finally, the proposed three-phase electronic ballast with current-equalization function will be implemented to validate and demonstrate the performance and feasibility of the proposed circuit     

一种用于投影光源的高性能电子镇流器

提出了一种用于投影光源的高性能电子镇流器.主电路采用无源无损的缓冲电路,减小了由于续流二极管反向恢复所引起的开通损耗,提高了镇流器的效率.以数字控制器为核心,结合模拟方式的PWM控制,实现了恒功率控制.分析了镇流器的工作原理并给出了实验结果,实验结果表明该镇流器具有电路简单、可靠性高的优点,实验样机的效率达到了94%.     

Single-switch electronic ballast with continuous input current charge pump power-factor correction

This paper presents a single-switch electronic ballast with continuous input current charge pump power-factor correction. The ballast circuit is composed of a series/parallel inverter, a charge pump power-factor corrector, and a dimming controller. The characteristics and design considerations of this ballast are discussed in this paper. Dimming control is achieved by varying the switching frequency. The frequency-modulation scheme is used to reduce the low-frequency output current ripple. A prototype of a 36WT8 fluorescent lamp ballast has been implemented and tested. Experimental results verify the analytical derivations.