一种高压自适应频率电荷泵  

A high voltage frequency-adapted charge pump

作　　者：李德安[1] 梅当民 范涛 袁国顺[1] 

机构地区：[1]中国科学院微电子研究所,北京100029 [2]北京中科微电子技术有限公司,北京100029

出　　处：《电子技术应用》2014年第2期33-35,38,共4页Application of Electronic Technique

基　　金：国家科技重大专项(2010ZX02201-003-003)

摘　　要：提出了一种新颖的高压自适应频率电荷泵结构,包含了变频振荡电路、电平变换电路和两级升压电路。与传统电感式电荷泵及脉冲宽度调制方式电荷泵相比,本结构有噪声小和轻载转换效率高两个突出的优点。该电路使用了CSMC 0.35μm BCD CMOS工艺,在单片步进电机驱动芯片上的应用结果表明,该电荷泵具有效率高、易集成、反应快及稳定性好等优点,最大输出电流达3 mA。This paper proposes a high vohage frequency-adapted charge pump, which includes variable oscillation circuit, volt- age transform circuit and two-stage boost module. Compared with traditional inductive charge pump and PWM mode charge pump, it has two outstanding advantages of little noise and high efficiency at light loads. This circuit is based on the 0.5 μm BCD CMOS technology of CSMC. The results of applying in single-chip stepper motor driver show that this charge pump has many advantages, such as high efficiency, good stability, easy integration, fast response etc, and the maximum output current up to 3 mA.

关 键 词：电荷泵 频率自适应 调制 稳定性 

分 类 号：TN492[电子电信—微电子学与固体电子学]