With the development of the times, most electronic products need to receive signals and process them. The DC DC 12 ac to dc converter is used to process these signals. How should businesses choose the information of DC DC power supply module? Let's know today.
1. Rated power
Generally, it is recommended to use 30% to 80% of the rated power of the module. The specific ratio is also related to other factors, which will be mentioned later. In this power range, all aspects of the module power supply are completely stable. The load is too light, leading to a waste of resources. If it is too heavy, it is not conducive to temperature rise and reliability.
2. Packaging form
Module power pack can provide a variety of ways, according to international standards, non-standard, and the same company's products, the same power product has different packaging, the same packaging has different power, so how to choose the packaging form? There are three aspects
(1) Under certain power conditions, the volume should be as small as possible, so as to provide more space and more functions for other parts of the system;
(2) Try to choose products that meet international standards, because the compatibility is better, not limited to one or two suppliers;
(3) It should be extensible to facilitate system expansion and upgrade.
Because of the function upgrade, the power requirements of the system are improved, the power module package remains unchanged, and the system board design can be modified without modification, which greatly simplifies the product upgrade and saves time.
3. Temperature range and derating
Generally, there are several temperature ranges for module power supply of manufacturers to choose from: commercial grade, industrial grade, military grade, etc. when selecting module power supply, the actual working temperature range must be considered, because the temperature grades are different, the material and manufacturing process have great price differences, and improper selection will affect the use. Therefore, careful consideration must be given to two options
One is to choose according to the power supply and packaging form. If the actual power is close to the rated power in some volume conditions (package form), the nominal temperature range of the module must strictly meet the actual needs, even slightly.
Second, according to the temperature range. That is to say, choose the products with higher power or package, that is, choose the products with higher power or package. In this way, the temperature rise of the big horse pulling the small car is lower, which can alleviate this contradiction to a certain extent.
