How to choose switching power supply module manufacturers

How to choose switching power supply module manufacturers?There are hundreds of domestic production module power supply manufacturers,and there are dozens of them in Nanjing.How can we choose the power module manufacturers that are suitable for ourselves?

1.Suitable for the size of your own.Some foreign brands are really good quality,but the price is not acceptable to every user,and the delivery time is very long compared to domestic brands.For some of the larger power module suppliers in China,this problem is also a problem.If the model you ordered is not the main shipping model,the delivery date is not guaranteed.If you propose to customize a special power supply,it is simply unimaginable for small and medium-sized customers.Because small and medium-sized enterprises,it is impossible to choose a supply platform like Huawei ZTE,and it is very important to choose a company that is suitable for its own scale.Companies like Pengtu Power Supply,which provide power solutions for SMEs and provide customized services.
2.Look at the product line.Such as module power supply,can provide industrial products like half brick,1 brick,1/8 brick,1/16 brick,if not available,indicating that the company's research and development strength and scale is not big.The ability to customize products,whether it can provide a wealth of customized products,such as railway,power,military customization experience is still very important.
3.Communicate with the company's FAE engineers to understand the company's implementation design standards and design processes.Such as the company's product reliability design standards,derating standards,electrical safety standards,EMC standards.Module new product design is a very rigorous process,a company that promises you can deliver a new product in a week is definitely a non-rigorous company,design details are very important,such as small overshoot and drop when power is established,feedback The stability of the network under extreme conditions,like some big companies do,is excellent,and few companies will pay attention to these design details.
4.look at the materials.Open a module power supply to look at it,it is more useful than listening to others.From the materials used in power products,it can be seen that the quality and positioning of this power supply manufacturer,like power supply materials,such as capacitors,MOSFETs,diodes and other key materials,can determine this is the power quality.First-line manufacturers like DCDC module power supply,large-capacity MLCC capacitors are basically TDK,Murata,Taiyo,and other brands,such as VISHAY,KEMET,AVX,etc.,MOSFETs are generally IR,VISHAY,ST,Renesas and so on.The two-pole selection is such as ONSEMI,ST,IR,Infineon and so on.A device that is very important for power supply is the power supply reference.The general manufacturer chooses TL431.This device manufacturer is different,and the price difference is still very large.For example,TI's products are much more expensive than domestic or Taiwan,but TI is very advantageous in terms of reliability and temperature drift.TI's product line is very fine,divided into several grades according to accuracy and temperature,TL431AI,where A represents 1%accuracy and I represents temperature grade.For example,C stands for 0-70 degrees,I stands for-40-85,and there are Q-files,which are-40-125 products.Don't say small factories,some domestic big factories,use C products.The products of the I file are also used in a small number.If you open the product and see if it is TI's product,if the third letter on its TL431 MARK is basically the temperature grade,such as TAI,TAC and the like.Pengtu power supply,all DCDC products,all use Class I TL431,AC/DC in addition to 3W,5W,10W,15W plastic shell civilian grade products,all products are using I grade TL431.Also look at the wiring,the transformer and the inductor inside the product are not SMT,the flying line inside is like a spider,it is hard to imagine that this is from the hands of the big factory.
5.look at the product certification,certification not only test the company's technology,but also the company's strength.Because the cost of certification is not low,and it is not regularly audited,so small companies basically do not have any certification.In all certifications,the standards basically adopted are basically the same,such as EN60950.However,the amount of gold in each certification body is different.Like 3C,TUV,etc.,the ratio is easier and the cost is lower.Like UL certification is still very strict,the audit is also diligent and costly,so it is very important to see if a company has UL certification.
Finally,the communication with everyone is to choose the module power supply produced by Nanjing Pengtu Power Co., your wise choice!