13.8 V / 15 A from a PC Power Supply

Posted on Jul 1, 2012

The major disadvantages of usual linear power supplies are high power dissipation, the size and the appropriated weight. When looking for an alternative solution, I decided to use a switch mode power supply (SMPS). The efficiency of such power supplies is around 70 % to 90 % at a power density of 0.2 W / cm³. Because homebrewing was out of the question due to lack of time, I tried the modification of a PC switch mode power supply. The later are mass-produced goods and available for less than 50 DM.

13.8 V / 15 A from a PC Power Supply
Click here to download the full size of the above Circuit.

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