In the case of active voltage stabilizing elements used in the power supply, even if the mains voltage fluctuates, its output is also constant. Like small transformers on the market, such as walkman and other power supplies, if the mains voltage fluctuates, the output of the power supply will also fluctuate.
In general, the true no-load voltage of the common power adapter is not necessarily the same as the nominal voltage, because the characteristics of the electronic components cannot be completely consistent, so there is a certain error. The smaller the error, the higher the requirements for the consistency of the electronic components, the higher the production cost, so the price is also higher. In addition, with regard to the nominal current value, no matter what power supply has a certain internal resistance, so when the power supply outputs the current, there will be a voltage drop inside, resulting in two things: one is to generate heat, so the power supply will be hot, and the other is to reduce the output voltage, which is equivalent to internal consumption.Keywords:
- Switching Power Supply