Design and optimization of high-efficiency 1W 500V-12V isolated low-cost DC/DC converter

Foray, Etienne; Martin, Christian; Allard, Bruno

doi:10.23919/epe20ecceeurope43536.2020.9215746

Cited by 6 publications

(3 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hence, they are not well suitable to supply microcontrollers, sensors, and so on. To increase the efficiency and to reduce the size at high input voltages and low output power, approaches, including multi-level converters [6]- [9], fly-buck converters [9], [10], and soft-switching converters [11]- [14], have been published, but their complexity is high and they still show a low light-load efficiency. In addition, although these converters allow for higher input voltages, their capability of handling input voltages of up to 400 V efficiently at a compact size is limited.…”

Section: Introductionmentioning

confidence: 99%

“…The same applies to fly-buck converters [Fig. 2 (center)] [9], [10]. Fast switching multi-level-buck converters, as in [6] [Fig.…”

Section: Introductionmentioning

confidence: 99%

“…Fly-buck converters [9], [10], [19] realize a much higher input-voltage scaling with a lower amount of components, due to the flexible dimension of the transformer's turns ratio n, but they still need a large external HV capacitor C HV at the primary side [see Fig. 2 (center)] and a large transformer T.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Resonant One-Step 325 V to 3.3–10 V DC–DC Converter With Integrated Power Stage Benefiting From High-Voltage Loss-Reduction Techniques

Rindfleisch

Wicht

2021

IEEE J. Solid-State Circuits

View full text Add to dashboard Cite

This work presents a self-timed resonant highvoltage (HV) dc-dc converter in HV CMOS silicon-on-insulator (SOI) with a one-step conversion from 100-325 V input down to a 3.3-10 V output, optimized for applications below 500 mW, such as IoT, smart home, and e-mobility. Unlike bulky power modules, the HV converter is fully integrated, including an on-chip power stage, with only one external inductor (10 µH) and capacitor (470 nF). It reaches a high power density of 752 mW/cm 3 , an overall peak efficiency as high as 81%, and a light-load efficiency of 73.2% at 5 V and 50 mW output. HV loss-reduction techniques are presented and experimentally confirmed to offer an efficiency improvement of more than 32%. Integrated HV insulated gate bipolar transistors (IGBTs) are discussed and implemented as an attractive alternative to conventional integrated HV power switches, resulting in ∼20% smaller area at lower losses.

show abstract