DC/DC Converter Isolated / Non-Isolated?

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Posted by Andreas Gene

on Jun 24 2012 05:09 AM

Dear forum,

I'd like to design a regulated +/-5V 200 mA powersupply for powering an analog filter front-end for data acquisition. Therefore I would need a dc/dc converter like the DCP010512DB with subsequent REG1117-5 voltage regulators. However the 0V should be connected to GND - so an ISOLATED DC/DC converter doesn't make sense at all. I am not a big fan of buck/boost regulaturs with coils, mosfets etc. as to my experience they are extremely dependent on PCB layout and generating switching noises in the 20 kHz range is fairly easy with messy design. So I thought about something more traditional. Maybe some of you have an elegant solution.

Yours,

Andreas

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Posted by Tom Guerin

on Jun 25 2012 16:45 PM

Verified Answer

Verified by Tom Guerin

Mastermind21350 points

DCR010505negative voltage busclamp only.pdf

Andreas:

I reviewed your request for a power supply from +5Vin to +/-5V at 200mAload.\

I attached a non-isolated power solution with common ground between primary and secondary buses using on one(-5v) DCR010505 regulated converter.

Tom

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