- #1
Frank Sinatra
- 1
- 0
Greetings
I am interested in designing a power supply that can accept 110V or 220V at 60Hz as input, and can provide an adjustable DC output of 0-20V.
Here is the thing: I know I can use a mechanical switch so that my supply can accommodate either 110 or 220V, but is there a way to do so without using such a switch?
I believe there must be a way to do so. My belief is motivated by an observation I made looking at my laptop adapter. My laptop adapter accepts 100-240V AC and provides a fixed 19V DC output, yet, it does this automatically without the need for a mechanical switch or any interference from the user.
I am tempted to think that this property is inherent to Switched-Mode Power Supplies. My knowledge about such supplies is rather limited. I read wikipedia articles about such supplies, but I would be delighted to have a good source.
To conclude: How can my supply accept 110V or 220V AC and still provide an adjustable DC output from 0 to 20V without requiring any human intervention?
Take care
I am interested in designing a power supply that can accept 110V or 220V at 60Hz as input, and can provide an adjustable DC output of 0-20V.
Here is the thing: I know I can use a mechanical switch so that my supply can accommodate either 110 or 220V, but is there a way to do so without using such a switch?
I believe there must be a way to do so. My belief is motivated by an observation I made looking at my laptop adapter. My laptop adapter accepts 100-240V AC and provides a fixed 19V DC output, yet, it does this automatically without the need for a mechanical switch or any interference from the user.
I am tempted to think that this property is inherent to Switched-Mode Power Supplies. My knowledge about such supplies is rather limited. I read wikipedia articles about such supplies, but I would be delighted to have a good source.
To conclude: How can my supply accept 110V or 220V AC and still provide an adjustable DC output from 0 to 20V without requiring any human intervention?
Take care