Matters needing attention when choosing a switching power supply

1. Select the appropriate input voltage specification;

2. Select the correct power. In order to prolong the life of the power supply, it is recommended to select a power supply with more than 30% of the rated output power. For example, if the system requires a 100w power supply, it is recommended to select a power supply with a rated output power of more than 130w.

3. Consider the load characteristics. If the load is a motor, light bulb or capacitive load, the power supply must be adequate to avoid overloading when the current is large instantaneous power.

4. In addition, it is necessary to consider the different temperatures of the working environment of the power supply, and whether there are additional auxiliary cooling technology equipment, and the power supply needs to derate the output when the ambient temperature is too high.

5. Select the power supply with protection function according to the needs of practical application research: over voltage protection (OVP), over temperature protection (OTP), overload protection (OLP), etc. Application main functions: signal processing function (power supply company is normal, power supply failure), remote control function, etc. Special functions: power factor correction (PFC), uninterruptible power supply (UPS), safety extra-low voltage protection (SELV).

6. Select the safety regulations and electromagnetic environment compatibility (EMC) certification that the data you need conforms to.

switching power supply

1. Before using the power supply, make sure that the input and output voltage specifications match the nominal value of the power supply used;

2. Before powering on, check the correct connection of input and output leads to avoid damage to user equipment;

3. Check whether the installation of the equipment is firm, whether there is contact between a screw and the power board device, and measure the insulation resistance of the casing and the input and output to avoid electric shock;

4. In order to ensure safety and reduce the use of interference to ensure reliable grounding;

5. The power supply system with multiple outputs is generally divided into main and auxiliary outputs. One characteristic of the main output is better than that of the auxiliary output. Generally, in this case, the output voltage and current are larger than the main output. In order to ensure the output load adjustment rate and output and other indicators, it is generally required that each channel should carry at least 10% of the load. If the auxiliary road is used instead of the main road, the main road must be properly dummy load. For specific analysis, please refer to the specifications of the corresponding product models.

6. Please note: frequent switching of the power supply will affect its life.

7. The working environment and the degree of load also affect its service life