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eGaN FETs Enable More Than 4-kW/in3 Power Density for 48 V to 12 V Power Conversion

eGaN FETs Enable More Than 4-kW/in3 Power Density for 48 V to 12 V Power Conversion

Growing computational power and miniaturization of electronics in computing and data centers is increasingly putting pressure on 48-V power delivery and conversion systems. High-efficiency and high-power–density converters enable a reduction in power losses at the system level while allowing smaller form factors. In this context, LLC resonant topologies combined with GaN technology succeed to deliver outstanding performance, as it has been demonstrated with multiple examples. This article will show the key design parameters and components to achieve beyond 4 kW/in3 of power density in a 48-V to 12-V LLC converter using eGaN® FETs.

Power Electronics News
December, 2022
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GaN-Based Low-Voltage Inverter for Electric Scooter Drive System

GaN-Based Low-Voltage Inverter for Electric Scooter Drive System

This paper deals with the application of the latest generation low voltage (up to 80 V) Gallium Nitride (GaN) devices for motor drive applications in the field of electric micro-mobility. A two-level inverter topology oriented to light electric traction (such as electric scooters) with a power rate of 1500 W has been considered. An experimental board using two GaN FETs in parallel connection for each switch of an inverter leg has been arranged. The intrinsic parameters spread of the device, as well as the leakage inductances of both the circuit and the PCB, to evaluate the impact on the current share during both the transient phase and in the steady state have been investigated. In the paper, several simulation runs have been carried out and described. Furthermore, the inverter experimental board has been used to evaluate the phase voltages and currents at different load conditions. Finally, the temperature limits versus phase current variation have been evaluated.

IEEE 2022 AEIT International Annual Conference (AEIT)
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The True Cost of Global Energy

The True Cost of Global Energy

EPC’s mission is to make GaN power devices that are higher performance and lower cost compared to silicon. GaN devices increase power density, improve efficiency and enable new applications and with the rising cost of energy globally, it is no surprise that the adoption rate of our GaN devices is accelerating dramatically.

Bodo’s Power Systems
November, 2022
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GaN Power Behind Mild Hybrid Vehicle Electrification

GaN Power Behind Mild Hybrid Vehicle Electrification

With increasing legislation aimed at higher fuel efficiency standards, vehicle manufacturers are searching for cost-effective solutions to meet these demands while still providing the power required for ever-increasing electronically driven functions.  This article details a bi-directional high power converter for mild-hybrid cars and battery backup units using GaN FETs to achieve efficiency exceeding 96% when converting from 48 V to 14.3 V at 500 kHz switching frequency.

Power Electronics Europe
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Podcast: electronica 2022 preview

Podcast:  electronica 2022 preview

From Nov. 15 to 18, electronica 2022 will bring the international electronics industry together at the Munich exhibition grounds. Wide Bandgap Semiconductors, Renewable Energies, Smart Grid, and Energy Storage will be the major topics covered by the Power Electronics Forum at electronica 2022. In this podcast, onsemi president and CEO Hassane El-Khoury, Silanna Semiconductor North America CEO Mark Drucker, and of Efficient Power Conversion (EPC) CEO Alex Lidow will introduce the Power Electronics Forum. Interview with Alex Lidow starts at 31:55

EETimes
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Dispelling Myths: Don’t believe it when they say you need a bipolar gate drive for eGaN FETs

Dispelling Myths: Don’t believe it when they say you need a bipolar gate drive for eGaN FETs

GaN devices have gone from initial R&D to mainstream designs over the last 15 years. Unfortunately, there are many misunderstandings left-over from those early-stage bipolar drive circuit developments or dead-end technology branches. One of the most pernicious is the topic of bipolar drive. In actuality, unipolar drives are the best way to drive eGaN® FETs.

Power Electronics Tips
October, 2022
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Chasing the Speed of Light

Chasing the Speed of Light

As the level of automation increases in machines, detailed awareness of the surroundings becomes necessary. Time-of-flight based 3D imaging systems have become the eyes of machines. eGaN® technology has been the workhorse of laser drivers for these systems, enabling the resolution to make intelligent decisions.

Bodo’s Power Systems
October, 2022
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Dispelling a Myth – GaN and Motor Drivers

Dispelling a Myth – GaN and Motor Drivers

There is a commonly held belief in the industry that GaN devices are wasted on inverters for electric motors. After all, if the performance of the system is restricted by the use of a 20KHz PWM, then there can be little benefit in using a material that gains the majority of its advantages from faster switching speeds. However, according to Marco Palma, Director of Motor Drives Systems and Applications at EPC, there are some ways that GaN can still prove effective in that role.

Power Systems Design
September, 2022
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GaN vs. Silicon Smackdown

GaN vs. Silicon Smackdown

One way to tell when a new technology has passed the tipping point of adoption is by the voices advocating the status quo. The more conservative voices tend to cite older information that, given the fast change of trajectory that occurs at a tipping point, can lead to poor decisions for new designs. In the world of GaN power devices the tipping point occurred in the past two years when the rate of new GaN-based designs started to double year-on-year, and the legacy MOSFET designs started to face critical supply shortages due to their finely tuned, but less flexible supply chains. GaN devices, on the other hand, have remained in stock at most major distributors due to their relatively new and flexible supply chains utilizing older silicon foundries, but affording these foundries a new and vibrant future. In this article we will address some of the common misconceptions still showing up in articles and at conferences, usually presented by advocates of the status quo.

Bodo’s Power Systems
May, 2022
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Model Behavior to Determine GaN Performance

Model  Behavior to Determine GaN Performance

Users of GaN FETs and ICs now have a tool to determine the derating needed in an application and reduce voltage derating factors. EPC has developed a first principle physics-based model to explain RDS(on) rise in GaN transistors under hard switching conditions. This article provides demonstrations for two synchronous rectification application examples.

Electronic Specifier
May, 2022
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Multi-phase MHZ Converter with GaN

Multi-phase MHZ Converter with GaN

This article presents a two-phase DC/DC GaN converter with 120 VDC input operating at 6.7 MHz. 120 VDC is a standard voltage level in the secondary power system at the International Space Station (ISS). Using GaN FET’s high power density and ultra-fast switching, Tell-i’s newly developed SDK board uses two phases to exceed normal switching speeds. Supporting a standard 120-V bus voltage, as used in systems like the ISS, the multi-phase configuration allows interleaving converters to achieve effective switching at 3 MHz, 5 MHz, and an outstanding 6.87 MHz. Optimal and compact layout is achieved with the use of four EPC2019 GaN transistors and two LMG1210 gate drivers for small gate drive and power loops.

Power Electronics News
April, 2022
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Wide-bandgap (WBG) Components Build a Green World that is Highly Efficient and Saving Energy

Wide-bandgap (WBG) Components Build a Green World that is Highly Efficient and Saving Energy

The mainstream materials for wide-bandgap (WBG) semiconductor power components are silicon carbide (SiC) and gallium nitride (GaN). They become various power system applications' most-preferred devices today with the rising awareness of energy conservation and sustainability. This was the first time Tech Taipei 2022 Conference used WBG as its theme. Speakers from key players in the industry were invited from design, manufacturing and testing fields to share with over 400 participants at the conference their latest technology and application trends.

EE Times Taiwan
March 25, 2022
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