The Overvoltage Protection Module for the Power Supply System for the Pixel Detector at Belle II Experiment at KEK

In this paper, the overvoltage protection module (OVP) for the power supply (PS) system of the Belle II pixel detector (PXD) is described. The aim of the OVP is to protect the detector and associated electronics against overvoltage conditions. These include failures of the PS itself, wrong settings of the output voltages, and also transients coming out of a noisy environment of the experiment. The OVP system works independently of any other protection of the PS system, increasing its overall reliability.