polfort Posted February 8, 2010 Report Share Posted February 8, 2010 Hello.If You look at Page 32 of this Datasheet: http://cds.linear.com/docs/Datasheet/3757fa.pdf, there is the LT3757 as a SEPIC Converter, delivering +-0.4A at +-12V.Could You tell me if it Quote Link to comment Share on other sites More sharing options...
Alex Tsekenis Posted February 8, 2010 Report Share Posted February 8, 2010 It is posible as the IC acts just as the controller in the circuit. The power switch, voltage divider, current sense, inductors,capacitors are external so by recalculaing their value (full details in the datasheet) you will be able to produce your required output.Also have a look at this app. note:http://www.national.com/an/AN/AN-1484.pdfYou could use the output divider to tweak the output voltage but vary it over such a range.Also you can use LTSPICE to simulate it. Quote Link to comment Share on other sites More sharing options...
polfort Posted February 8, 2010 Author Report Share Posted February 8, 2010 Thank You. Especially for that Application Note. Which is very useful and helps to calculate the proper values.Besides it makes clear the functionality of a SEPIC converter in detail :)Best regards,polfort Quote Link to comment Share on other sites More sharing options...
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