First of all , the whole chip function diagram is designed after analyzing the principle of charge pump and the system required function . and then , the sub - block circuit is designed according to the whole chip function and structure 通过对电荷泵dc / dc转换器的基本原理和系统功能的详细分析,论文首先介绍了整体结构,然后重点介绍了作者所负责的部分子模块电路。
With forward voltage of white led lower and lower , the efficiency of traditional charge pump driver is lower and lower , too . the new auto - adjustable charge pump can keep the charge pump working in high efficient 1x mode as long as possible 根据负载led的正向压降和输入电压选择工作模式,可以让驱动器最大限度地工作在高效率的1x模式下,有效地提高了驱动器的led效率。
An auto - adjustable charge pump embodied in a white led driver has been taped - out successfully using a 0 . 5 m cmos process . it can provide more than 80ma output current in the wide input voltage range from 2 . 7v to 5 . 5v 此电荷泵芯片采用0 . 5 mcmos工艺;输入电压范围为2 . 7 5 . 5v ;可以提供大于80ma的输出电流,同时驱动四颗白光led ;并且此芯片具有根据输入电压自动选择工作模式的功能。
In the application of driving white led , an auto - adjustable charge pump which adjust work mode according to the forward voltage of load led and input voltage is presented . the conventional charge pump changes work mode at fixed input voltage value 在电荷泵驱动白光led的应用中,本论文研究设计了一种根据负载led正向导通压降和输入电压来选择电荷泵工作模式的电荷泵型led驱动器。
Charge pump operation principle and a 50ma switched - capacitor automatic step - up / step - down charge pump converter with wide input supply voltage and multi output versions , which uses 0 . 5 m standard cmos technology , are presented in this paper 在对电荷泵原理研究的基础上,论文采用0 . 5 m标准cmos工艺设计了一种具有宽输入电压范围和多输出规格的50ma自动升/降压开关电容电荷泵dc / dc转换器。
In the regulations kinds , charge pump converters use capacitors to store and transfer energy and can work well for step up without the need for an inductor . therefore , applications that need low or medium power are making charge pump more and more attractive 其中,电荷泵电路采用电荷转移方式工作,在不需要电感元件情况下可实现一定升压,因此这类电源管理芯片在中低功率的应用中倍受欢迎。
Charge pump circuits that make use of charge accumulation in the capacitor can pump charge upward to produce voltage higher than the regular supply voltage , and they are widely used in memory circuits , such as flash memory , for the programming and erasing of the floating - gate devices 电荷泵是一种运用电荷在电容中的积累来产生高压(高于电源电压)的电路，它广泛应用在存储器电路中，诸如flashmemory ，用于对悬浮栅器件进行写或擦除操作。
A high - efficiency white led driver based on charge pump was designed in this paper , which introduces the structure of charge pump to perform the conversion of rising input voltage , drives up four white leds in parallel with regulated constant current and keeps all leds with uniform brightness 本文设计了一种基于电荷泵的高效率白光led驱动电路。它采用电荷泵结构对输入电压进行升压变换,以可调节的恒定电流驱动并联的4只白光led ,并保持每个led的亮度相同。
For saving driver ics ' power consumption and cost , this research proposes a novel display pixel design with integrated charge pump circuits . the proposed display pixel design can supply driving voltage more than double the input voltage to display pixels . there are two advantages for this developed novel pixel design . first , the power consumption of the panels with the proposed novel pixels can be reduced due to the lower voltage on data lines . second , the high voltage driver ics are not necessary , such that the cost and power consumption of the corresponding driving systems can be diminished . from the simulation results , the pixel voltage indeed could raise to more than double input voltage by this proposed design . in addition , the pixels with charge pump circuits also retrench about half power consumption than the conventional display pixels 为了节省面板电路驱动芯片的功率损耗以及制作成本,本研究提出一种新的像素电路设计,而在设计中将会融合电荷泵电路.利用这种电路设计的像素可有效地将像素电极上的驱动电压提高到输入电压的2 3倍以上.此像素电路设计具有两个优势:第一,可以有效降低显示面板的像素功率损耗;第二,不需高电压的面板电路驱动芯片,因此可节省芯片的成本及功率损耗.由模拟结果可知,像素电极上的驱动电压确实可由此像素电路设计而提高到输入电压的2 3倍以上;而像素的功率损耗也可有效地降低,约为传统像素的1 / 2
Within this scope , users can get almost any frequency clock by configuring the register , as the tune - process is nearly continual ( in fact there are many discrete frequency points ) . the main circuit of the clock generator is a cppll ( charge pump pll ) designed in a method 该时钟发生器可以向系统提供频率范围是93 . 75k - 180mhz的时钟信号，用户可以通过配置寄存器的方法使时钟发生器输出自己需要的频率，而且这一调频过程几乎是连续的(实际上是众多离散点构成的线性近似) 。
