How to safely Buck isolated side supply +182VDC to regulated 148VDC.

Genatco

AC Line Isolated unregulated 2.5KW, 182vdc +/- 2% 20 amps source - regulated to 148vdc 16-18 amps.

WebBench Power Stage Designer can not find parts for a non-isolated DC buck converter solution yet formulates needed parameters.

A non-isolated linear solution required for 34v drop @16-18 amps 612 watts takes four 200 watt resistors in parallel costing nearly $80.00.

Any ideas how to drop 612 watts efficiently without a buck converter that doesn't seem to exist?

0 JohnTucker over 9 years ago

My group does not handle anything with those type of power requirements. Let me check some additional resources for a possible solution.

0 Genatco over 9 years ago in reply to JohnTucker

Guru 55913 points

The 16-18 amps are peak switching currents while the average will mostly be around 12-13 amps or less pure inductive load.

Thanks John

0 Genatco over 9 years ago in reply to JohnTucker

Guru 55913 points

Hi John,

Seems DC/DC front end power regulation in stage 1 conversion and may be on the edge of discovery?

training.ti.com/systems-made-simple-part-2-gate-drivers-solar-inverters

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