Copper-based hybrid fabrication of a 50 W, 5 MHz 40 V-5 V DC/DC converter

Miwa, Brett A.; Casey, Leo; Schlecht, M.F.

doi:10.1109/63.64998

Cited by 16 publications

(4 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…DC-DC converters are the key power bridge that steps down the rack level voltage (48V) to the load server level voltage (<5V). Some early work was carried out for the research of point-of-load (POL) converters [6], [7]. Traditionally, the POL converter suffers mainly from a large conduction loss.…”

Section: Introductionmentioning

confidence: 99%

Pentacentra Transformer for Multiphase LLC Converter in High-Current Data Center Application

Wang,

Li,

Ouyang

et al. 2024

IEEE Trans. Power Electron.

View full text Add to dashboard Cite

The role of data centers has become significant in the era of information technology, and their operation consumes a substantial amount of energy. Therefore, the point-of-load (POL) converter or voltage regulation module (VRM) used in data centers must have high efficiency and power density to deliver a large current to specific servers. A common bus voltage 48V at the rack stage needs to be stepped down to intermediate bus voltage, which is 6-5V in this case. To achieve this, a new pentacentra transformer was developed for a 4-phase LLC converter. A centra bar serving as the 5 th leg of the core is added to the conventional 4-leg matrix transformer. The interleaving and integration of windings in the proposed pentacentra transformer enabled balanced current sharing and reduced conduction loss by 45% compared to the traditional winding layout. The experimental prototype of the converter was designed to achieve 800 W power output at a switching frequency of 500 kHz and 48V-40V/6V-5V voltage conversion. The peak efficiency achieves 98.1% along with the power density of 240 W/in 3 with the experimental result. Without the heatsink, the whole converter is operating at rated power within a safe temperature lower than 86 °. The excellent thermal performance ensures the reliable operation of the converter and promises a larger power delivery capability.

show abstract

Section: Introductionmentioning

confidence: 99%

Pentacentra Transformer for Multiphase LLC Converter in High-Current Data Center Application

Wang,

Li,

Ouyang

et al. 2024

IEEE Trans. Power Electron.

View full text Add to dashboard Cite

show abstract

“…1 has been described in detail in [6] and [7]. It is essentially a two-stage converter with a pre-regulator up-converter supplying a dual resonant forward converter circuit.…”

Section: Prototype Controller/driver Icsmentioning

confidence: 99%

“…22, the two input signals are level shifted by PI and P2, (p = y), which operate as current-source loaded source-follower stages. These level shifted signals are then applied to the differential amplifier input transistors, P 3 and P4, (7). T h e differential pair has a current doubling load formed by N1 and N2, ( f ) .…”

Section: Comparator-pwm Outputmentioning

confidence: 99%

CMOS drive and control circuitry for 1-10 MHz power conversion

Casey¹,

Ofori-Tenkorang²,

Schlecht³

20th Annual IEEE Power Electronics Specialists Conference

Self Cite

View full text Add to dashboard Cite

show abstract

“…If the copper loss is instead reduced by winding multiple layers of primary and secondary, then interconnecting the layers poses a complicated fabrication problem. For example, protruding tabs that fold over the windings can be used, but they further reduce the available height for copper [2].…”

Section: Introductionmentioning

confidence: 99%

The relationship between size and power dissipation in a 1-10 MHz transformer

Goldberg¹

20th Annual IEEE Power Electronics Specialists Conference

View full text Add to dashboard Cite

This paper considers the tradeoff between size and power dissipation in the design of low profile 1-10 MHz transformers with planar spiral windings. For a fixed power loss and number of conductor layers, the transformer with the smallest possible footprint can be designed by a tradeoff of core and copper loss. This paper discusses the relationship between the marginal reduction of transformer footprint, and the associated marginal increase in power dissipation and/or number of conductor layers, for the design of the smallest possible transformer.

show abstract

Copper-based hybrid fabrication of a 50 W, 5 MHz 40 V-5 V DC/DC converter

Cited by 16 publications

References 9 publications

Pentacentra Transformer for Multiphase LLC Converter in High-Current Data Center Application

Pentacentra Transformer for Multiphase LLC Converter in High-Current Data Center Application

CMOS drive and control circuitry for 1-10 MHz power conversion

The relationship between size and power dissipation in a 1-10 MHz transformer

Contact Info

Product

Resources

About