The impact of DC regulated power supply on electronic equipment
Due to the characteristics of electronic technology, the requirement of electronic equipment for power circuits is to be able to provide continuous and stable power that meets load requirements, and usually requires stable DC power. The power supply that provides this stable DC power is a DC regulated power supply. According to the working state of the regulating tube, DC regulated power supplies can be divided into two categories, linear regulated power supplies and switching regulated power supplies.
Output voltage range
The output voltage range that can work normally under the conditions of DC regulated power supply. The upper limit of this indicator is specified by the maximum input voltage and the minimum input-output voltage difference, while its lower limit is determined by the reference voltage value inside the DC regulated power supply.
Maximum input-output voltage difference
This indicator represents the maximum allowable voltage difference between input and output under the normal working conditions of the DC regulated power supply. Its value mainly depends on the withstand voltage index of the internal adjustment transistor of the DC regulated power supply.
Minimum input-output voltage difference
This indicator represents the minimum input-output voltage difference required to ensure the normal working conditions of the DC regulated power supply.
1. The influence of the input voltage range. When the input voltage is too high, some components will be damaged due to excessive voltage applied or excessive power consumption. When the input voltage is too low, the performance of some components will be degraded. , doesn't even work.
2. The impact of unstable voltage. For example, the power supply of the oscilloscope must be stable to ensure the accuracy of the deflection sensitivity of the light spot, scanning time, etc.; another example is that a digital voltmeter requires an internal stable power supply to ensure the accuracy of the voltage/digits. Conversion accuracy.
3. The impact of overvoltage at the output end. For example, when the output voltage of a DC regulated power supply exceeds the rated voltage of the integrated circuit by more than 30%, it may cause extensive damage to the integrated circuit.
4. The impact of short-term power outage. For example, local telephone communication cannot have an instantaneous power outage, otherwise global communication will be interrupted and cause a major accident; another example is that when computers are powered by AC, an AC uninterruptible power supply must be used.
This shows how important the role of DC regulated power supply is in electronic equipment. It can completely eliminate these effects and play a very important maintenance role in the working process of electronic equipment.
