Hello,
-----Short Version-----
Does the capacitance value of the primary side capacitor and the secondary side capacitors of a switching power supply matter?
Can I use capacitors with higher capacitances instead?
-----Long Version------
I was going to build an AC>DC Power supply, but after quarreling with the thought of death by electrocution, I decided to do something a little less potentially hazardous:
http://www.ladyada.net/make/mintyboost/process.html
Essentially the idea is to use a buck boost type topology to be able to charge 5V USB devices. So, it is pretty straightforward, BUT, when I build an electronics project, I like to put more focus on performance/quality than on being economic. Of course, I won't be throwing in a $25 tantalum capacitor, but rather above average components.
So regarding the component selection. I've read the datasheet thoroughly, and for the main smoothing/input cap, it seems that the value does not have to be exact. It says anywhere from 10uF to 100uF is acceptable. I was curious as to what would happen if say I used a 220uF cap in its place. It should theoretically reduce ripple, but would it have any negative effects?
Switching power supplies are more picky about components than linear, I have determined. But does the value of that capacitor matter?
In addition to that, what effect does the value of the output capacitor have? The more farads the merrier? Or not?
Inductors, I have learned, are generally not to be played with. It seems that their values must be very precise. So that remains the same.
I just got a bulk shipment of components in from Mouser and I'm hoping to actually get a project going after quite some time. (I've spent more time trying to pick out a project than actually building them!)
Merry Christmas/Happy Holidays.
Thanks a lot.
-----Short Version-----
Does the capacitance value of the primary side capacitor and the secondary side capacitors of a switching power supply matter?
Can I use capacitors with higher capacitances instead?
-----Long Version------
I was going to build an AC>DC Power supply, but after quarreling with the thought of death by electrocution, I decided to do something a little less potentially hazardous:
http://www.ladyada.net/make/mintyboost/process.html
Essentially the idea is to use a buck boost type topology to be able to charge 5V USB devices. So, it is pretty straightforward, BUT, when I build an electronics project, I like to put more focus on performance/quality than on being economic. Of course, I won't be throwing in a $25 tantalum capacitor, but rather above average components.
So regarding the component selection. I've read the datasheet thoroughly, and for the main smoothing/input cap, it seems that the value does not have to be exact. It says anywhere from 10uF to 100uF is acceptable. I was curious as to what would happen if say I used a 220uF cap in its place. It should theoretically reduce ripple, but would it have any negative effects?
Switching power supplies are more picky about components than linear, I have determined. But does the value of that capacitor matter?
In addition to that, what effect does the value of the output capacitor have? The more farads the merrier? Or not?
Inductors, I have learned, are generally not to be played with. It seems that their values must be very precise. So that remains the same.
I just got a bulk shipment of components in from Mouser and I'm hoping to actually get a project going after quite some time. (I've spent more time trying to pick out a project than actually building them!)
Merry Christmas/Happy Holidays.
Thanks a lot.
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