Teach you to choose and use the right DC/DC module power sup
2020-08-18
DC/DC module power supply is widely used in communication, network, industrial control, railway, military and other fields due to its small size, outstanding performance, and convenient use.
Many system designers have realized that choosing the correct and reasonable DC/DC module power supply can save the trouble of power supply design and debugging, and focus on their professional fields, which can not only improve the reliability and design level of the overall system , And more importantly, it shortens the entire product development cycle and wins valuable business opportunities for leading and winning in the fierce market competition. So, how to choose the DC/DC module power supply correctly and reasonably? From the perspective of the development and design of the DC/DC module power supply, combined with the user information feedback obtained during the promotion and use of the module power supply, I will talk about this issue for Reference for the majority of system designers.
Selection of DC/DC module power supply
In addition to the most basic voltage conversion function when choosing a DC/DC module power supply, the following aspects need to be considered:
1. rated power
Generally, it is recommended that the actual power used is 30-80% of the rated power of the module power supply (the specific ratio is also related to other factors, which will be mentioned later.). All aspects of the module power supply performance within this power range are fully and stable. reliable. Too light load causes waste of resources, and too heavy load is detrimental to temperature rise and reliability. All module power supplies have a certain overload capacity. For example, the products of the following companies can reach 120-150%, but it is still not recommended to work under overload conditions for a long time. After all, this is a short-term emergency measure.
2. Package form
There are various packaging forms of module power supplies. There are also international standards and non-standard ones. For the same company's products, the same power product has different packages, and the same package has different power. Then how to choose the package form? There are three main aspects:
① The volume should be as small as possible under certain power conditions, so as to give more space and functions to other parts of the system;
② Try to choose products that comply with international standard packaging, because the compatibility is better, not limited to one or two suppliers;
③ It should be extensible to facilitate system expansion and upgrade. Choose a package. Due to the increased power requirements of the system due to function upgrades, the power module package remains unchanged, and the system circuit board design does not need to be changed, which greatly simplifies product upgrades and saves time. Take Ding Lixin’s high-power module power products as an example: all comply with international standards, are half-brick and full-brick packages widely used in the industry, and are fully compatible with famous brands such as VICOR, LAMBDA, and the power range of half-brick products covers 50-200W. Full brick products cover 100～300W.
