CD-ROM/DVD马达驱动电路的设计与开发

Design and Development on CD-ROM/DVD Motor Drive Circuit

本文介绍了一种CD-ROM/DVD马达驱动IC的设计和简洁地介绍了其职能。为例AM5954,本文给出了主要功能模块的电压基准的工作原理,热保护电路,当前的传输电路和级联与数学推导运算放大器。委员会还讨论了布局设计,尤其是困难和一个马达驱动集成电路布图设计的重点,提供相应的解决方案。

This article introduces the design of a CD-ROM/DVD motor driver IC and describes its functions concisely.Taking AM5954 as an example,this paper gives the operating principle of the voltage reference in key functional modules,the thermal protection circuit,the current transfer circuit and the Cascode operational amplifier with mathematical derivation.Finally,the design of layout is discussed,especially the difficulty and key point in the layout design of a motor driver IC,and corresponding solutions are provided.