In application note DER-447 values of components are different than Design Spreadsheet
why the values of components and and voltage ranges are different then design spread sheet in application note der-447
from whrer different values of components are come
Comments
could you specify the exact component differenct and voltage range difference on the application note?
we recommend to follow the design example as a good start point. we don't have detailed formulas to share
which design example i will follow.i was attached my design for Hiper LCS design for 18V,10A and5V,0.5A can you please Verify that this design is ok or having some corrections
| Attachment | Size |
|---|---|
| schematic | 43.3 KB |
| design spreadsheet | 104.76 KB |
from,where i will get the design calculations for this circuit,please guide me for this flyback design also
| Attachment | Size |
|---|---|
| 12V flyback.PNG | 35 KB |
spread sheet is a general design tool. DER447 is CC/CV control topology, so that FB circuit is different in DER447b schematic and spreadsheet.
what you show on 12V flyback schematic is suing primary side regulation.
your schematic shows your input is maybe 115Vac, then your spread sheet Vin is 220Vdc. not consistent.
DER447 is designed for battery charging application for CC/CV control.
I NEED CALCULATION/LOGIC FOR COMPONENT SELECTION FOR 12V FLYBACK BIAS PRIMARY SUPPLY
please refer to report page 43 PIXL design. YOu can also go to LNK-TN web for PIXL design examples. Please note LNK_TN is not recommended for new design, pleas euse LNK_TN2 for your project.
https://ac-dc.power.com/sites/default/files/PDFFiles/der447.pdf
https://ac-dc.power.com/products/linkswitch-family/linkswitch-tn2/
I REQUIRE FEED BACK CIRCUIT DESIGN CALCULATION DETAILS(FORMULAS) FOR DESIGN SMPS USING LCS705HG CONTROLLER,PLEASE GUIDE ME FOR THE SAME