DC-DC Power Module and Thermal Design Design of reasonable EMC peripheral circuits | Aahhesionpower.com

 1，DC-DC Power Module Thermal Design


The DC-DC Power Module heat dissipation is mainly through natural convection, forced air cooling, heat-sink installation methods or several combinations of them. For DC-DC Converters with small power below 40W, the natural heat dissipation is mainly considered in the design. In use the installation environment is mainly considered. To make it have the convection space, there is a certain power derating, and detect the case temperature at the actual maximum ambient temperature.


For DC-DC Converters above 40W or with radiator mounting holes, forced air cooling or radiator installation must be considered. The basic method is to calculate the dissipated power Pd=Pout / -Pout of DC-DC Power Module through efficiencyη , calculate the case temperatureθc-a=(Tc-Ta)/Pd through the maximum shell temperature T c and the required working environment temperature Ta, and select the appropriate heat sink or wind speed according to the calculated heat resistance. The calculation is only the first step to consider the heat dissipation, and due to many external environmental factors, the case temperature must be verified after selecting the heat sink and the wind speed for further correction.


2，Design of reasonable EMC peripheral circuits


Use the recommended reference circuit 1, which has good lightning protection properties.



FIG. 10 recommended reference to circuit 1


At present, more and more products require that the input to Ground is not only to meet the high isolation, but also to meet the high common mode surge, and do not allow surge protective devices between the input and Ground. At this point, the recommended reference circuit 2 is a good option.



FIG. 11 recommended reference to circuit 2


评论

发表评论

此博客中的热门博文

What are the functions and usage of tea tree essential oil?

图片
  The most prominent effect of tea tree essential oil is the antibacterial effect of   tea tree essential oil . The use of tea tree essential oil has a certain strengthening effect on the immune system and enhances the resistance of the skin. Tea tree essential oil has a good effect on problem skin such as acne skin and rash. The use of essential oils has always been our most concerned topic, and the use of tea tree oil is no exception. Tea tree essential oil also has certain characteristics. It is one of the few essential oils that can be directly applied to the skin. At home, tea tree oil is still used very frequently. The wide application of tea tree essential oil is mainly due to its antibacterial effect. For example, in life, tea tree essential oil can be dripped into the water for washing hands, it can play a very good antibacterial and sterilization effect, and has a certain function of resisting colds. Tea tree oil can be used to improve skin problems such as acne. You can use
阅读全文

Which nanomaterials have different crystal forms

图片
 In recent years, the application of nanomaterials has received increasing attention. Nanomaterials have a larger specific surface area and submicron size, giving them chemical and physical properties that differ from macroscopic substances. The crystal structure of nanomaterials has a significant impact on their properties. Nanomaterials with different crystal forms have certain advantages in their respective application fields. Dongguan SAT NANO is a professional company that provides nanomaterials, with years of technical research and market experience. We provide customers with high-quality nanomaterials and different crystal forms to help them meet their innovative needs. Next, let's take a look at several common nanomaterials and their different crystal forms. 1. Titanium dioxide nanomaterials Titanium dioxide is a widely used nanomaterial that can be used in fields such as solar cells, catalysts, self-cleaning coatings, etc. The crystal forms of titan
阅读全文

Reveal the skin care glass packaging plating process

图片
  Skincare glass packaging   plays a crucial role in the beauty industry, and its radiant appearance is often an important factor in attracting consumers' attention. However, the secret behind this is not only the glass itself but also the plating process hidden on its surface. In this article,   we will discuss in depth the plating process of skin care glass packaging , revealing the mystery behind it. Surface plating technology  is the plated parts (products) immersed in a potion containing metal ions to be plated and connected to the cathode, the other end of the potion placed on the appropriate anode (soluble or insoluble), after the DC, the surface of the plated parts that is precipitated a layer of metal film method. A simple understanding of the physical and chemical changes or combinations. It is commonly used in skin care glass packaging materials to add texture to the appearance and protective properties. This technique can involve coating the surface of the glass with a
阅读全文