1. How to understand this stable voltage and non-stable voltage? What's the difference? ==> Voltage regulation means that the output voltage is relatively stable and does not change with the load. Non-regulated voltage means that the output voltage will fluctuate within a certain range after reaching the rated load.
2. What is the difference between constant voltage input and wide voltage input? ===> Constant voltage refers to the input voltage within a certain range (generally ±5% and ±10%) can get the corresponding output voltage. Wide voltage refers to the relatively wide input voltage range (generally 2:1 or 4:1) can get the corresponding output voltage. For example: wide voltage nominal 12V input, 2:1 range is 9-18V, 4:1 is 9-36V
3. What is the difference between quarantined and non-quarantined? Isolation refers to the separation of input and output from each other. Non-isolation means that the input and output have common ground.