140CFU08000 总线模块
140CFU08000 总线模块
智能化数字电源系统的优化设计
介绍了数字电源系统的主要特点及发展现状，简要分析了组成系统的各类芯片的性能特点及工作原理，重点阐述数字电源系统的电路设计。为实现数字电源系统的优化设计提供了具体方案。
引言
开关电源正朝着智能化、数字化的方向发展。刚问世的智能数字电源系统以其优良的特性和完备的监控功能，正引起人们的关注。数字电源提供了智能化的适应性与灵活性，具备直接监控、处理并适应系统条件的能力，能满足任何复杂的电源要求。此外，数字电源还可通过远程诊断来确保系统长期工作的可靠性，包括故障管理、过电流保护以及避免停机等。
特点
数字电源系统的主要特点
数字电源系统具有以下特点。
1)它是以数字信号处理器(DSP)或微控制器(MCU)为核心，将数字电源驱动器及PWM控制器作为控制对象而构成的智能化开关电源系统。传统的由微控制器(μP或μC)控制的开关电源，一般只是控制电源的启动和关断，并非真正意义的数字电源。
2)采用“整合数字电源”(Fusion Digital Power)技术，实现了开关电源中模拟组件与数字组件的优化组合。例如，功率级所用的模拟组件——MOSFET驱动器，可以很方便地与数字电源控制器相连并实现保护及偏置电源管理，而PWM控制器也属于数控模拟芯片。
3)高集成度，实现了电源系统单片集成化(Power system on chip)，将大量的分立式元器件整合到一个芯片或一组芯片中。
4)能充分发挥数字信号处理器及微控制器的优势，使所设计的数字电源达到高技术指标。例如，其脉宽调制(PWM)分辨力可达150ps(10-12s)的水平，这是传统开关电源所望尘莫及的。数字电源还能实现多相位控制、非线性控制、负载均流以及故障预测等功能，为研制绿色节能型开关电源提供了便利条件。
5)便于构成分布式数字电源系统。
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