  The ATLAS detector is set to undergo a substantial upgrade termed the
"Phase-II" upgrade during the Long-Shutdown in preparation for the start of
operation of the High Luminosity Large Hadron Collider (HL-LHC). This paper
describes the development and implementation of the Phase-II upgrade low
voltage power supply transformer-coupled buck converter (Brick) test bench. A
large scale production of approximately 2048 finger low voltage power supplies,
with an identical output voltage, is set to be undertaken in the year 2022.
This production will culminate in the complete replacement of the LVPS Brick
V7.5.0 currently installed within the Tile Calorimeter. Due to the location of
the Bricks within the inner barrel of the TileCal their reliability is of the
utmost importance. Therefore, the implementation of performance screening will
be implemented and will involve the testing and certification of all Bricks
produced. A custom test bench has been developed in order to facilitate the
above-mentioned testing. The test bench described herein quantifies and logs
the performance of an upgrade Brick allowing for comparison with predefined
performance metrics before being approved and subsequently installed
on-detector.
