source:power adapter Popular:adapter release time:2021-10-08 11:40:31 Article author:sznbone
Common sense of power adapter parameters!
Example: The parameter of the power adapter is 12V1.25A-it means that the voltage output is 12V, the maximum output current is 1.25A (not the actual current used), the power is equal to the voltage multiplied by the current, and the maximum power is 15W.
The output current of the power supply in actual use is different according to the electrical equipment. Whether the power supply is suitable for use, firstly depends on the power supply voltage, and secondly the maximum current must be large enough.
For example, our commonly used BBS wireless microphone power supply is 12V1.25A. Generally speaking, the voltage can have a little error, 10V to 15V can be used-there will be a voltage regulator circuit on the circuit board, and this voltage regulator circuit is allowed to Voltage range work. But the maximum output current of the power supply should be more than three times the rated current consumption of our equipment.
The quality of the power supply has a great influence on the audio signal amplification output. In the case of meeting the voltage output size, if the current is too small, the power supply voltage may be pulled down when a large dynamic signal is amplified (or even cause the power transformer to be protected), and then the sound signal output will be distorted and sound ( Especially the treble), which will cause the subsequent equipment to burn out in serious cases.
In addition, the power supply will also affect the sound. For example, the sound presented by the linear power supply (the transformer directly changes 220V to low voltage) and the switching power supply will have differences in strength and fineness of the sound.
So once the original power transformer is damaged, you can temporarily use other transformers of the same specification on top, but if you want to restore the original sound characteristics of the device, you still need to replace the original power supply.
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