When we choose a power module, we usually judge the quality from the input, output, ripple, breakdown, temperature, certification and other characteristic indicators of the power supply. In addition to these, we can also judge the quality based on the following few factors: Points to judge
1. Circuit principles and welding processes. Bare boards can be judged through intuitive methods, such as the neat layout of components. Potted modules are not exposed and the internal conditions cannot be viewed. The quality requirements of mechanized production of wave soldering processes. Better than manual welding, generous, but better in terms of safety and performance
2. Chip components and transformer components The core of the power supply is IC, which will directly affect the entire power supply. Transformer components determine the power and high temperature resistance wait. . Responsible for completing AC-DC and frying pan saturation when energy is overloaded.
3. Is it an electrolytic capacitor or a ceramic capacitor? (1) Electrolytic capacitors are temperature-sensitive components that cause the electrolyte to heat up and explode (2) Ceramic capacitors are mainly non-polar, and the switching frequency will cause the capacitance to deteriorate. Parasitic resistance heats up, good dielectric materials and capacity should not be too large, most widely used in high-frequency circuits
4. Batch detection of aging and high-temperature aging, no matter how well the product materials and production process are controlled Quality stability and whether the materials have safety hazards also need to be tested for aging. Only through power aging and high temperature detection