At present, there are many kinds of power supply modules on the market. Different power supply products have different input voltage, power, function and topology. Their characteristics are all power supply systems for microprocessors, integrated circuit chips, large digital signal processors, analog circuits, and other large digital or analog loads.
The credibility of the power module is relatively high, but it will also produce common faults. The following section analyzes several common power faults for you.
The output voltage is slightly lower
When the output voltage of the 24 volt led power supply is too low, the later stage power supply circuit can not work normally. When the load suddenly expands in the microprocessor system software, the power supply system voltage of the microprocessor will be pulled down, resulting in the microprocessor calibration. This will have a devastating blow to all the system software level power supply circuits, and will lead to a chain reaction of the whole disk being destroyed.
Is the low output voltage generally caused by these reasons?
The output stage is connected in series with several loads. In normal operation, the load must have a large amount of transient current, which will cause the voltage to be reduced instantaneously and harm other loads in series; The output line is too long or too thin, resulting in excessive line loss.
Finally, when the output voltage of the power supply module reaches both sides of the real load, the voltage is slightly lower; The pressure drop of anti reverse connection secondary pipe is too large, usually the forward pressure drop of secondary pipe is between 0.3 ~ 0.7V.
If the output voltage of the power module is 5V, the current caused by the diode with high conduction pressure drop will make the voltage of the later stage power circuit slightly lower, and then it can not work normally.
The input filter inductance in the external power supply circuit of the control module is too large, resulting in the increase of the internal resistance and the improvement of the current control efficiency. When the later stage load suddenly becomes heavier and heavier, the current supply can not be supplied, resulting in a slightly lower voltage on both sides of the load.
Input voltage high
Because the voltage capacity design scheme of some electronic components in the power supply module is insufficient, when the input voltage is too high, the control module will be damaged, and even damaged. It is necessary for people to do some maintenance in the field.
What is the common cause of high input voltage?
When the 12v dc driver is hot swapped and powered on at the input end, the voltage spike and surge current are high, and the control module with anti pressure difference will be destroyed by transient thermal breakdown.
The output load is too light, less than 12% of the rated load, for some discrete system regulator power products, the control module may not be damaged, but it will harm some characteristics of the later stage.
