Digital Pulse-Width Modulation Integrated Circuit Controllers

提出了基于cmos的脉冲宽度调制（PWM）集成电路的分析、设计和开发。这项活动代表了广泛的电源管理应用中使用的硬件控制器的新范例，这些应用包括离线电源、工业和电信dc-dc转换器，以及桌面和便携式计算设备以及蜂窝电话手持设备中应用的dc-dc转换器。在过去的三十年里，模拟PWM控制器在这些应用中占据主导地位。随着数字CMOS技术和相关设计工具的出现，现在用数字IC控制器取代模拟控制器是非常可行的，这些控制器在分辨率、响应速度、芯片尺寸、成本等各个方面的性能都与模拟控制器相匹配，并提供进一步的优势。其优势将体现在支持电池供电便携式设备的极低功耗模式，通过在线调整可调参数实现效率提升策略，以及通过减少离散元件数量实现成本节约。具体来说，传统上用于模拟解决方案的补偿组件已被数字控制技术淘汰，并且通过使用嵌入式计算能力来实现状态和参数估计方法，也减少了对硬件传感组件的需求。该项目包括对实现这里所述目标的方法的研究。也就是说，要解决实现这些目标所需的系统和控制体系结构，并结合硅硬件级别的设计考虑。研究将集中在一些典型应用的例子上。

The analysis, design, and development of CMOS-based pulse-width modulation (PWM) integrated circuits (ICs) for power management applications is proposed. This activity represents a new paradigm for the hardware controllers used in a broad range of power management applications that include off-line power supplies, industrial and telecommunication dc-dc converters, and dc-dc converters applied in desktop and portable computing equipment, and in cellular telephone handsets. Over a period encompassing the last three decades, analog PWM controllers have dominated these applications. With the advent of digital CMOS technologies, and associated design tools, it is now very feasible to supplant the analog controllers with digital IC controllers that match the former's performance in all aspects - resolution, speed of response, die size, cost - and offer further advantages. Advantages will be realized in supporting very low power modes for battery-powered portable equipment, in efficiency enhancing strategies realized by on-line tuning of adjustable parameters, and cost savings realized by reduction of discrete component count. Specifically, compensation components traditionally used in analog solutions are made obsolete with digital control technology, and through use of embedded computational power to implement state and parameter estimation methodologies, the need for hardware sensing components is also reduced. The project encompasses the study of methodologies for achieving the goals stated here. Namely, the system and control architectures needed to achieve these objectives are to be addressed, in conjunction with design considerations at the silicon hardware level. The research will focus on examples, taken from a number of representative applications.