Magnetically Integrated Low-Voltage High-Current Converter with CDR and TLVR for Data Center

• Published in: 2024 IEEE 7th International Electrical and Energy Conference (CIEEC) pp. 4045 - 4049
• Main Authors: Tan, Jingyang, Rong, Zhenshuai, Wang, Yijie, Xu, Dianguo
• Format: Conference Proceeding
• Language: English
• Published: IEEE 10-05-2024
• Subjects: coupling inductor; current doubling rectifier (CDR); Integrated design; Low voltage; magnetically integrated design; Prototypes; Rectifiers; trans-inductors; Transformer cores; Transformers; Voltage
• DOI: 10.1109/CIEEC60922.2024.10583779

In recent years, with the rapid development of emerging information technologies such as blockchain, artificial intelligence and cloud computing, many large-scale data centers have been established. These data centers have high power requirements to drive CPUs and GPUs. Due to the low supply voltage, high current, and fast power change of CPUs and GPUs, data center power solutions face the challenges of high conversion rate, high current, and fast transient response. In this paper, we propose a low-voltage high-current converter based on half-bridge and current-doubler rectifiers, where coupled inductors and trans-inductors will be used on the output side to improve the dynamic response. A novel core structure is proposed where the transformers, coupled inductors and trans-inductors are integrated into a single core structure. A prototype of the proposed topology and magnetically integrated design was fabricated with an input voltage of 48 V and an output voltage of 0.75 V. The results were tested for output currents ranging from 10A to 120A.