mikep

9 V To 48 V DC-DC Converter Design
« Reply #40 on: May 05, 2007, 10:55:34 AM »
nice work sam.

Quote from: "jdbakker"

The fixed input voltage and linear post-regulator eliminate most of the 'hard' parts of a SMPS. If you want an easily-available IC, I suspect you can get similar performance with a 555.


interesting.  but also, with the tightly defined input/output conditions perhaps another LT chip could achieve MUCH lower output noise.  I know it's possible because one of my employer's designs contains a circuit that does essentially that, but I can't share the details cos Id likely get ganked.

mike p


jdbakker

9 V To 48 V DC-DC Converter Design
« Reply #41 on: May 05, 2007, 12:10:23 PM »
Quote from: "mikep"
with the tightly defined input/output conditions perhaps another LT chip could achieve MUCH lower output noise.

This was suggested further upthread, but Samuel really wanted to use this particular chip.

JDB.
[IME, with modern switcher chips, building a quiet converter is mostly a matter of carefully following the data sheets and appnotes]


 

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