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LP3986 bảng dữ liệu(PDF) 11 Page - National Semiconductor (TI) |
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LP3986 bảng dữ liệu(HTML) 11 Page - National Semiconductor (TI) |
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11 / 13 page ![]() Application Hints (Continued) MICRO SMD MOUNTING The micro SMD package requires specific mounting tech- niques which are detailed in National Semiconductor Appli- cation Note (AN-1112). Referring to the section Surface Mount Technology (SMT) Assembly Considerations. For best results during assembly, alignment ordinals on the PC board may be used to facilitate placement of the micro SMD device. MICRO SMD LIGHT SENSITIVITY Exposing the micro SMD device to direct sunlight will cause misoperation of the device. Light sources such as halogen lamps can effect electrical performance if brought near to the device. The wavelengths which have most detrimental effect are reds and infra-reds, which means that the fluorescent light- ing used inside most buildings has very little effect on per- formance. A micro SMD test board was brought to within 1cm of a fluorescent desk lamp and the effect on the regu- lated output voltage was negligible, showing a deviation of less than 0.1% from nominal. www.national.com 11 |
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