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300A Single-Stage 48V Voltage Regulator with Multiphase Current Doubler Rectifier and Integrated Transformer
Year: 2022 | Author: Xin Lou | Paper: H-S3.5
Fig. 1. Schematic of the proposed converter with inte-grated multiphase current doubler rectifier.
The prototype of the multiphase current doubler rectifier is shown in Fig. 2. With the pro-posed integrated multiphase current doubler rectifier, the footprint is 21 mm × 50 mm and the thickness is 4.45 mm. The compact prototype means the power density can reach 1.9 kW/in3 and 332 W/in2 under 300 A output current and 1.8 V output voltage. Even if the 160 A continuous current is considered, the power density can still be larger than 1 kW/in3.
The footprint of the 48/1.8 V prototype is compared with the state-of-art 12/1.8 V multiphase buck converter with the same output current ability. Furthermore, in Fig. 2, it can be observed that the secondary side gate drivers, which are highlighted with red boxes, take a lot of foot-prints. If the gate drivers are integrated into the secondary SRs, which is a common practice for commercial products, the footprint can be further reduced to 21 mm × 42 mm. It means a smaller footprint than the state-of-art 12/1.8 V multiphase buck converter. The proposed 48/1.8 V converter sets a new record of power density for single-stage 48V solutions.
Fig. 2. Comparison between the proposed 48/1V converter and 12/1V multiphase buck converter.
