Teach you how to choose the power module power frequency encapsulation isolation voltage BOSHIDA Modular Power Supply
Power module is a power conversion device for the electronics industry, with modular design, moisture, vibration, reliability and other advantages, widely used in electric power, industrial control, instrumentation, medical electronics, rail transportation, communications communications, security, military systems and other fields. So how do we choose the right power module?
Power module product selection factors to note:
1, rated power
Generally recommended power is 30~80% of the rated power of the module power supply.
2, operating frequency
The higher the general operating frequency, the output ripple noise is smaller, but the higher the requirements of the component materials, so the higher the efficiency of the price is also more expensive.
3, power loss and efficiency
General output power under certain conditions, the smaller the module loss, the higher the efficiency, low temperature rise, longer life.
4, package form
Under certain power conditions, the volume should be as small as possible to ensure that the system is safe, reliable and scalable.
5, temperature range
Generally: commercial-grade, industrial-grade, military-grade selection, consider the actual need for the operating temperature range, from which to choose, different temperature levels used in different materials and processes, different levels of price differences.
6, isolation voltage
High isolation voltage can ensure that the power module smaller leakage current, higher safety, reliability, EMC characteristics.
7, stable reliability
In the product to consider the product in a harsh environment or extreme when it is good.
Power module manufacturers to choose the factors to pay attention to:
1, look at their own requirements for the product
Compared with foreign brands and domestic brands, foreign brands have higher product quality, but the delivery period is long and the price is high, and the domestic delivery is fast and cheap.
2, look at the product design standards
Modular power supply design is a very rigorous process, like reliability design standards, derating standards, electrical safety standards, EMC standards, etc., you can communicate with the manufacturer's designers before purchasing.
3, look at the product with the material
From the material can be seen on the power module manufacturer's quality and positioning, a good material determines a good quality.
4, look at the product certification
A good certification is a test of the manufacturer's technical standards, product certification cost price is not low, they will also verify the manufacturer from time to time, so it is worth trusting.
According to the production and quality, big brands and big manufacturers whether in a single field or in the general field is certainly preferred, after all, the rule of penny wise and pound foolish in the market is still very applicable. But this is not to say that those small brands and small manufacturers of products are not good products, some small manufacturers in the material than the big manufacturers of better, and technical specifications on the characteristics of the index of the middle and upper.
But as a large manufacturer, there are many advantages that small manufacturers can not be compared. For example, in the procurement of key components, often can be more low-priced procurement of big brand products, and small manufacturers if these materials have to pay a higher price. Its production is also relatively professional, more experienced in quality control of high-volume products.
There are also some products on the market to take the route of cost-effective, the material belongs to the same level of big-name products inside the upper, very good workmanship, the characteristics of the indicators in the upper, low price, the overall cost-effective. Can only say that you are willing to power your instruments and equipment under how much cost, what quality.
Sometimes engineers in the design of the product, the product power supply system to choose the sample, the feedback is the most difficult to buy a good power supply. Because the quality of the power supply is very difficult to detect, some after repeated testing, and even after a long period of aging, often in the shipment of a few months there will be a certain percentage of bad.
Generally preferred in the selection of power supply to consider its reliability, but do not forget that again reliable power supply products if there is no reasonable use, there will be problems. Such as industrial-grade power supply module damage is 15% due to poor heat dissipation caused by the small size of the power supply module, often used in small spaces and long hours of operation, heat buildup leads to internal device failure. When used in complex situations, power module manufacturers generally recommend increasing the appropriate peripheral circuitry to increase its reliability.
If you want to get a stable and reliable power supply module, in addition to using the original power supply products, but also need to develop engineers and suppliers of technical personnel to communicate with the planning, in order to reduce the occurrence of problems.