Electronics > Projects, Designs, and Technical Stuff
Adj Power Supply PCB suggestions
(1/2) > >>
IamSynthetiC:
Greetings,

I have a need for a  small adjustable power supply to power my circuits that are not on the bench (where the lab power supply sits), or simply require a second rail. And since power supplies fascinate me, i though of designing and building my own. Unfortunately, i have no expirience designing, nor building power supplies, hence i've come to the experts ;D

I wanted this supply to have

* High  Efficiency
* Low Noise
* Small Footprint
* Powerd by 12V wall adapter or an 18V drill battery
i have selected some parts that seem to fit my needs, and i followed their datasheets as best as i could. I will attach my design bellow.
This design is definetly not final as it lacks safety features, and its dimensions will probably change to fit into an enclosure

So, have i done something wrong? is there something that can be improved ? is there something i should note ?

Thanks for your time and have a good day

*Edit : i attach the design as an image aswell :


PlasmaArcEng:
Without looking too deeply into it, the MIC29303 pin 1 is a FLAG, a sinking (active low) output for an error condition, so the led attached has to be reversed and attached to the +ve rail. I am sure the resistors you have for the LEDs are place holders as 100K wont give you any appreciable output.
IamSynthetiC:
Wow, nice catch. I must have missed this about 20 times so far  |O. Thanks.

other than that, i think i'll order the parts and pcb and make one or two.
bin_liu:
The noise of the switching power supply is not small. ;D
IamSynthetiC:
 |O |O |O |O |O |O

I put this together very hastefully, but still. I though in the datasheet i had seen the words "low noise" but no. Doesnt even provide a noise graph.
Thank you kind sir, for saving me some troubles, aswell as from my own stupidity and self.

Do you have any switching supplies suggestions ? Any you have worked with ?
I'll probably select one with a higher frequency for now.

Thanks again.
Navigation
Message Index
Next page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod