A 90.6% Efficient, 0.333 W/mm2 Power Density Direct 48V-to-1V Dual Inductor Hybrid Converter with Delay-line Based V2D Controller

A 90.6% Efficient, 0.333 W/mm2 Power Density Direct 48V-to-1V Dual Inductor Hybrid Converter with Delay-line Based V2D Controller

Hua, Yuan (Student TU Delft)
Lu, Qi (Student TU Delft)
Li, Shuangmu (Student TU Delft)
Zhao, Bo (Zhejiang University)
Du, S. (TU Delft Electronic Instrumentation)

2023

This brief presents a 48V-to-1V 10-level dual inductor hybrid converter (DIHC) containing 11 on-chip switches and an off-chip gallium nitride (GaN) switch. Thanks to the 10-level Dickson switched-capacitor (SC) circuit, most of the voltage stress will be taken over by off-chip capacitors, which reduces the voltage stress of each switch to 4.8 V and takes full advantage of the voltage pressure on the 5-V on-chip transistors. This proposed structure is implemented in a 0.18- $\mu \text{m}$ BCD process to convert 48-V input to 1-V output with up to 18-A current load. The post-layout simulations show that a peak power efficiency of 90.6% can be achieved at 5.2-A loading and the power density is about 0.333 $W/mm^{2}$ considering the power stage area.

hybrid dc-dc converter
10-level
48V-to-1V
GaN switch
5-V on-chip transistors

http://resolver.tudelft.nl/uuid:850245df-f061-469e-972b-223be8853df8

https://doi.org/10.1109/TCSII.2022.3219243

2023-09-27

1549-7747

IEEE Transactions on Circuits and Systems Part 2: Express Briefs, 70 (3), 1014-1018

Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Institutional Repository

journal article

© 2023 Yuan Hua, Qi Lu, Shuangmu Li, Bo Zhao, S. Du