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LP2981 数据表(PDF) 13 Page - National Semiconductor (TI) |
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LP2981 数据表(HTML) 13 Page - National Semiconductor (TI) |
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13 / 16 page ![]() Application Hints (Continued) 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 also affect electrical performance if brought near to the device. The wavelenghts which have the most detrimental effect are reds and infra-reds, which means that the fluorescent light- ing used inside most buildings has very little effect on perfor- mance. A micro SMD test board was brought to within 1 cm of a fluorescent desk lamp and the effect on the regulated output voltage was negligible, showing a deviation of less than 0.1% from nominal. www.national.com 13 |
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