When selecting bare board power supply, engineers often need to comprehensively compare the cost, packaging and power supply of bare board 12v to wall plug adapter, and the bare board power supply products provided by manufacturers often provide customers with several different products for easy selection, such as commodity grade and industrial level, which is a more common differentiation mode. Due to the different temperature levels, production materials and manufacturing processes of bare board power supply, the price difference is very large. Once it is improperly selected, it will also affect the use. Therefore, it is very important to master the temperature range.
In order to ensure efficiency, a more convenient and effective selection method is to start from the temperature range and combined with the comprehensive comparison of power, which can help engineers quickly find a more appropriate power mode. Let's look at the details of this method.
First of all, we need to ensure that the temperature range not only meets the needs of actual work, but also has a little margin. Different product models have different requirements for temperature range. When selecting the temperature range, the engineer needs to consider the upper limit higher than the maximum temperature and the minimum temperature, so as to avoid the instability of system performance after the temperature increases or decreases.
In the first case, if the engineer chooses products with small temperature range due to cost control, he needs to choose products with large power or packaging, so as to slightly reduce the temperature rise and alleviate the contradiction to a certain extent. Generally speaking, the proportion of body reduction will change with the change of power level. Generally, the forehead droop value above 50 W is 3-10W / ℃, which can be used by the engineer to calculate the forehead droop value. If the selected product has a wide temperature range, the use of bare board power supply is sufficient. Smaller products can be selected in the packaging, but the cost requirements are high; If products with general temperature range are selected, the price and cost are lower, and the power margin and packaging form must be greater. In both cases, engineers need to compromise under the conditions of determined temperature range.
