| 失效分析技术在开关电源质量鉴定中的应用 |
| |
| 引用本文： | 李红高,刘学森,颜景林,刘跃东,杨晓云,刘从俭. 失效分析技术在开关电源质量鉴定中的应用[J]. 电子质量, 2013, 0(2): 17-32 |
| |
| 作者姓名： | 李红高 刘学森 颜景林 刘跃东 杨晓云 刘从俭 |
| |
| 作者单位： | 华碧司法鉴定所,江苏苏州,215024 |
| |
| 摘 要： | 开关电源是一种控制开关管开通和关断的时间比率,维持稳定输出电压的一种电源。其核心是一片能输出脉宽调制信号(PMW)的电源管理芯片。该文从电学分析角度和物性分析手段对电源电路板进行失效分析,分析发现元件U2以及三极管Q1电学功能正常,但U2及Q1内部芯片与塑封料界面有分层现象。
|
| 关 键 词： | 开关电源 脉宽调制信号 分层 |
Application of FA Thchnology in the Quality Identification for Switching Power Supply |
| |
| Li Hong-gao , Liu Xue-sen , Yan Jing-lin , Liu Yue-dong , Yang Xiao-yun , Liu Cong-jian. Application of FA Thchnology in the Quality Identification for Switching Power Supply[J]. Electronics Quality, 2013, 0(2): 17-32 |
| |
| Authors: | Li Hong-gao Liu Xue-sen Yan Jing-lin Liu Yue-dong Yang Xiao-yun Liu Cong-jian |
| |
| Affiliation: | (FALAB Judicial identification center,Jiangsu Suzhou 215024 ) |
| |
| Abstract: | Switching power supply is a power supply which can control switch turn-on and turn-off time ratio,maintaining the stability of the output voltage.Power management chip is It is the key component.In the paper,we conducted the failure analysis for PCBA of the supply with the means of electrical analysis and material analysis technology.The results shows that the Electrical function of component U2 and Q1 is normal.But De-lamination is found between die and EMC in the component. |
| |
| Keywords: | Switching power supply PMW De-lamination |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
