A Two-stage Universal Input Charger with Wide Output Voltage Range

Mike Ranjram; Cheng Zhang; David Perreault

doi:10.1109/ECCE.2019.8913317

A Two-stage Universal Input Charger with Wide Output Voltage Range

Mike Ranjram, Cheng Zhang, David Perreault

EEE - Academic & Research

Massachusetts Institute of Technology

Research output: Contribution to journal › Article › peer-review

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Abstract

This paper presents the design of a two-stage 50W portable charger architecture with universal ac input and 5V/25W, 9V/45W, 12V/50W output. A 98.5% efficient valley-switched boost converter operating at 0.5-2MHz enables a 47% reduction in the buffer capacitor volume while a stacked-bridge LLC converter with a Variable-Inverter-Rectifier-Transformer (VIRT) offers greater than 96% efficiency across the wide output voltage range. The design demonstrates the potential and trade-offs of a two-stage architecture at this operating power.

Original language	English
Journal	IEEE Power Electronics Magazine
Early online date	28 Nov 2019
DOIs	https://doi.org/10.1109/ECCE.2019.8913317
Publication status	Published - 2020

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10.1109/ECCE.2019.8913317

Ranjram_Zhang_OJPEL_twoStageCharger_prePubAccepted author manuscript, 3.21 MB

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title = "A Two-stage Universal Input Charger with Wide Output Voltage Range",

abstract = "This paper presents the design of a two-stage 50W portable charger architecture with universal ac input and 5V/25W, 9V/45W, 12V/50W output. A 98.5% efficient valley-switched boost converter operating at 0.5-2MHz enables a 47% reduction in the buffer capacitor volume while a stacked-bridge LLC converter with a Variable-Inverter-Rectifier-Transformer (VIRT) offers greater than 96% efficiency across the wide output voltage range. The design demonstrates the potential and trade-offs of a two-stage architecture at this operating power.",

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AB - This paper presents the design of a two-stage 50W portable charger architecture with universal ac input and 5V/25W, 9V/45W, 12V/50W output. A 98.5% efficient valley-switched boost converter operating at 0.5-2MHz enables a 47% reduction in the buffer capacitor volume while a stacked-bridge LLC converter with a Variable-Inverter-Rectifier-Transformer (VIRT) offers greater than 96% efficiency across the wide output voltage range. The design demonstrates the potential and trade-offs of a two-stage architecture at this operating power.

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M3 - Article

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JO - IEEE Power Electronics Magazine

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A Two-stage Universal Input Charger with Wide Output Voltage Range

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