基于ATE的移动端电源管理芯片DC-DC模块的测试分析

发布时间：2018-03-29 09:07

本文选题：电源管理芯片　切入点：ATE　出处：《西安电子科技大学》2014年硕士论文

【摘要】：近些年来,移动通信技术迅猛发展,电源管理技术逐渐成为限制终端工作性能的重要因素,因此合理统筹移动设备的电源管理与分配逐渐成为了研究的重点。在电源管理芯片中,DC-DC转换器具有较高转换效率,能够对电压进行升压/降压转换的优点,已经成为了电源管理芯片中最主要的部分。在现代手机系统的电源解决方案中,由于IMVP(英特尔移动电压配置)方案的广泛采用,能够根据手机处理器工作频率而动态进行电压分配的DC-DC模块逐渐成为了电源管理芯片的主要构成部分。但是在生产过程中随着工艺参数的漂移,DC-DC的输出特性差异很大,为了节省芯片生产成本,需要对DC-DC进行校准测试,从而使尽可能多的DC-DC满足设计要求。本论文从变压模式和控制原理两个方面,分析了DC-DC电压转换器工作机制。研究了PMIC芯片的整体功能,并对其工作模块进行了划分。该芯片的电压输出部分主要由DC-DC模块和LDO模块构成,其中DC-DC模块包含PWM/PFM控制器、MOS开关驱动和反馈三部分。在此基础上,建立了DC-DC模块电压校准模型。针对DC-DC量产测试需求,设计了满足4个DC-DC模块并行测试的负载板,进行了测试板芯片的管脚、基于时序和电压特性测试文件的电平以及针对待测模拟信号特点的模拟采样模块的配置,建立并优化了测试流程,采用D2S框架协议完成了测试向量的开发,编写了测试数据处理程序,在此基础上,进行了PMIC芯片的实测验证,验证结果表明,该结果表明此方案不仅能够实现电源管理芯片DC-DC模块的量产测试,而且还可以校准不合格芯片的参数,为量产芯片良率的提升,测试时间的缩短,生产成本的降低,提供了一条有效地技术途径。
[Abstract]:In recent years, with the rapid development of mobile communication technology, power management technology has gradually become an important factor limiting the terminal performance. Therefore, the reasonable coordination of power management and distribution of mobile devices has gradually become the focus of research. In the power management chip, DC-DC converters have the advantages of high conversion efficiency and the ability to boost / depressurize voltage. Has become the most important part of the power management chip. In the modern mobile phone system power solution, due to the IMVP( Intel Mobile Voltage configuration) scheme widely used, The DC-DC module, which can dynamically distribute the voltage according to the working frequency of the mobile phone processor, has gradually become the main component of the power management chip. However, the output characteristics of DC-DC vary greatly with the drift of the process parameters in the production process. In order to save the cost of chip production, it is necessary to calibrate the DC-DC so that as many DC-DC as possible can meet the design requirements. The working mechanism of DC-DC voltage converter is analyzed. The whole function of PMIC chip is studied, and its working modules are divided. The voltage output part of the chip is mainly composed of DC-DC module and LDO module. The DC-DC module consists of three parts: PWM/PFM controller switch driver and feedback. Based on this, the voltage calibration model of DC-DC module is established. According to the requirement of DC-DC mass production test, a load board is designed to meet the requirements of four DC-DC modules for parallel testing. The pin of the test board chip, the level of the test file based on timing and voltage characteristics and the configuration of the analog sampling module based on the characteristics of the analog signal to be tested are configured, and the test flow is established and optimized. The test vector is developed by using the D2S framework protocol, and the test data processing program is written. On this basis, the PMIC chip is tested and verified. The results show that, The results show that this scheme can not only realize the mass production test of the DC-DC module of the power management chip, but also calibrate the parameters of the substandard chip. An effective technical approach is provided.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM46

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