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The LT3759 is a wide input range, current mode, DC/DC controller which is capable of regulating either positive or negative output voltages from a single...
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LT3759 Excel Design Tool only calculates BOOST values no SEPIC specific calculation

HWeng108

on Oct 8, 2021

Hello. Using ADI's LTpowerCAD II V2.7.2 I downloaded the Excel design tool for the LT3759 (see attached). The device is intended for both SEPIC and Boost converters however the design tool appears only to calculate values specific to a Boost converter. Do you have a tool for the LT3759 to calculate SEPIC values, specifically the coupled parallel inductor and recommended SEPIC capacitor value. I understand that the calculations are available in the datasheet however the excel tool is quick to calculate all the relevant values for various possible input conditions and output voltage and power requirements.

Thank You

LeslieXLS

Fil

on Nov 4, 2021 6:11 AM
Hi Leslie,

Sorry for late reply. Unfortunately, the SEPIC excel tool is only available for ADI internal use. Do you have NDA with ADI so I can send you copy separately? If none, either you connect to local ADI FAE to help you with computation or you can send me SEPIC operating requirement so I can run the excel for you.
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broehrich
on Dec 1, 2021 5:01 AM in reply to Fil
Hi, I'm having a similar problem trying to use LT powerCAD to evaluate an existing Sepic coupled L design using the LT3757. When I load LT powerCad I can see an LT3757(Sepic Coupled L) Excel Design tool in a row in the search. How can I setup an NDA to get the Sepic design tool spreadsheet?
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Fil

on Dec 22, 2021 11:35 AM in reply to broehrich
Please connect to local ADI sales personnel.
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