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T: Fachverband Teilchenphysik

T 33: Silicon Detectors IV

T 33.6: Vortrag

Dienstag, 17. März 2026, 17:30–17:45, KH 01.022

Characterization of the bPOL48V DC-DC converter and Integration Tests with a CMS Phase-2 Strip Module — Lutz Feld, Katja Klein, Martin Lipinski, and •Joëlle Savelberg — 1. Physikalisches Institut B, RWTH Aachen

The bPOL48V is a newly developed DC-DC Point-of-Load (POL) buck converter designed at CERN and characterized at RWTH Aachen University within the DRD7 program, which supports R&D for future electronic systems and technologies for particle-physics experiments. It converts a 48 V input to an adjustable low-voltage output (5-24 V), enabling power delivery at higher distribution voltages and lower cable currents, thereby improving overall system efficiency by reducing Ohmic losses.

The converter features a radiation-hard controller designed at CERN, capable of continuous operation up to 50 Mrad and in magnetic fields above 4 T. It is paired with a EPC2152 GaN power stage. This combination provides performance in harsh radiation and magnetic-field environments, making the bPOL48V a strong candidate for power distribution in future high-energy physics experiments.

At RWTH Aachen, the bPOL48V has been characterized in multiple setups, evaluating its efficiency, stability, temperature dependence, and radiated and conducted noise. This presentation focuses on reducing conducted noise using a pi filter, demonstrating clear improvements consistent with simulation. Additionally, we present results in which the bPOL48V powers a CMS Phase-2 silicon strip module as a proof of principle, confirming its suitability for detector integration.

Keywords: DC-DC Converter; Power Distribution; Future Collider; Silicon Tracker; DRD7