Currently on the market all kinds of small products, high-power switching power supply, switching power supply module in full of beautiful things in eyes, so as a general users, buyers, how do we go to choose a suitable switching power supply, choose custom high-power switching power supply manufacturers?
General parameters
We need to consider the parameters including voltage, current, and other auxiliary functions. Voltage and current is the most basic of two parameters. With the power supply, for example, is to the motherboard CPU power supply and need 5 v voltage, electric current need to be calculated based on the system power consumption, such as 5 a, then we are in the actual purchase option 5 v / 5 a power supply? In fact we have in the design of some derating design, generally we choose slightly 20% higher than the actual use of power, this power supply working effect is better, reliable, stable, slight overload system is also irrelevant. Namely: when choosing power general use power large 20% than it actually is.
Overall dimensions
According to the power of the equipment room to choose, right. Many times we request as small as possible, but the volume small, the price is high, so don't blindly pursuing of compact size.
The temperature
Determine the power using the environment temperature, choose suitable for switching power supply module. Switching power supply manufacturers generally is the temperature of power module shell temperature are given, such as 25 + 85 degrees, 85 degrees so said power shell temperature up to 85 degrees, more than 85 degrees, if the power is likely to enter the protection status, or damaged. Must consider when choosing the power of its ambient temperature and power supply efficiency, temperature rise is low efficiency, low temperature rise and efficiency is high.
installation
Module power has two kinds of packaging form, is a kind of guide pin type, one is the terminal type. Guide pin type can be directly welded on the PCB printed circuit board, choosing the power supply should try to choose standard products, this form of power for heat dissipation, suitable for radiator (general manufacturers supporting products). Terminal type power supply output terminal connection are used and electrical equipment, power supply can be directly fixed on the equipment shell, and with the aid of the shell heat dissipation.