Journal
CHEMOSENSORS
Volume 9, Issue 6, Pages -Publisher
MDPI
DOI: 10.3390/chemosensors9060144
Keywords
radiation sensor; silicon photomultiplier (SiPM); boost converter
Funding
- IC Design Education Center (IDEC), Korea
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This paper presents an optimized step-up power converter using a quadratic sawtooth waveform generator for a silicon photomultiplier (SiPM) used as a radiation sensor for mobile radiation dosimeters. The converter achieves stable regulation of the bias voltage of an SiPM and maintains a high efficiency even under light load conditions.
This paper proposes an optimized step-up power converter using a quadratic sawtooth waveform generator for a silicon photomultiplier (SiPM) used as a radiation sensor for mobile radiation dosimeters. Although our step-up converter uses the topology of a switched inductor boost converter in voltage mode, it achieves a fast transient performance thanks to the proposed quadratic sawtooth waveform generator, which can increase the loop bandwidth. As a result, the proposed boost converter can stably regulate the bias voltage of an SiPM, even in a situation where the radiation particles are injected. In addition, since the proposed quadratic sawtooth waveform generator can be designed with low power, it was able to achieve 86% peak efficiency even under the light load conditions.
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