I have a power supply design I am working on and I am using switching regulators by CUI (V7805-1000 AND the V7812-1000) instead of a typical linear regulator. So far, in testing, I am happy with these switching regulators. However, I am concerned about the longevity of my design and wanted to know if anybody has any suggestions.
Both of these regulators I am using now are rated to a max input voltage of 32VDC. I am feeding the regulators both with a 24VAC output transformer into a full wave bridge rectifier. Even though I should get 24VDC out of the rectifier, I actually get more voltage out. I am reading around 34VDC. This exceeds the regulator input by 2 volts. It seems to be working okay but I am not comfortable with this. In reading about full wave rectifiers it seems what I am seeing is normal as I need to factor in the peak voltage and should then be multiplying my rated 24VAC output by 1.4 which comes to 33.6V which is pretty much what I am seeing happen. I am a newbie to power supply design and this is more for a personal/hobby project.
I was not aware of this and was hoping to feed my regulators with 24VDC to be well under the 32 volt max input. I would like to look at quick and easy ways to bring this voltage back down to 24VDC. I hope to not have to add too many components or cost.
Any ideas?
Thank you!!
Mike
Both of these regulators I am using now are rated to a max input voltage of 32VDC. I am feeding the regulators both with a 24VAC output transformer into a full wave bridge rectifier. Even though I should get 24VDC out of the rectifier, I actually get more voltage out. I am reading around 34VDC. This exceeds the regulator input by 2 volts. It seems to be working okay but I am not comfortable with this. In reading about full wave rectifiers it seems what I am seeing is normal as I need to factor in the peak voltage and should then be multiplying my rated 24VAC output by 1.4 which comes to 33.6V which is pretty much what I am seeing happen. I am a newbie to power supply design and this is more for a personal/hobby project.
I was not aware of this and was hoping to feed my regulators with 24VDC to be well under the 32 volt max input. I would like to look at quick and easy ways to bring this voltage back down to 24VDC. I hope to not have to add too many components or cost.
Any ideas?
Thank you!!
Mike