| corrieb |
Hi All,
I am a brand new newbie when it comes to smps.
I am making a smps for a car audio amplifier , I have read a lot on smps design but can't find anything related to the designing of the output filter inductors. Can anyone perhaps help me with a formula/calculation?
Thank you,
corrieb |
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| sagarverma |
| i have built a 300w smps.o/p inductors not used.i/p 12v passes thru 100uh inductors.hope this helps. |
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| sss |
i think bigger= better for those inductors (not too big )
u can take some iron powder cores with 10 turns of wire (thick), this works for me :) |
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| corrieb |
Thanks for the replies I will go and try tonight.
corrieb |
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| buloi123 |
L=Ton*(Vin-Vout)/0.3Iout
The bigger the inductor, much better, for it can fixed more ripple current. But be careful w/ your inductor, as you increase your inductor value, the current capacity and saturation current of your inductor also decreases. |
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| sss |
| if u are using output inductors where do u take the feedback signal? after or before the inductor? |
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| corrieb |
SSS,
I take the feedback after the inductor, other wise I am struggling to regulate the smps. why?
corrieb |
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| sss |
| quote: | Originally posted by corrieb
SSS,
why?
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because i'm also building one and dont know whats better :)
also , do u put the filter caps after or before the inductors? |
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