The subsequent GaN design frontier: EMI management

A brand new gallium nitride (GaN) energy IC claims to additional simplify and pace the event of small type issue, high-power-density purposes by providing better integration and thermal efficiency. In addition to the mixing of drive, management and safety, it additionally incorporates EMI management and loss-less present sensing, all inside a high-thermal-performance proprietary DPAK-4L package deal.

Navitas Semiconductor has unveiled this machine, GaNSlim, following the discharge of its GaNFast and GaNSense gadgets. The Torrance, California-based provider is focusing on GaNSlim gadgets at chargers for cell gadgets and laptops, TV energy provides, and LED lighting.

Determine 1 GaNSlim is the corporate’s third-generation machine with autonomous EMI management and loss-less sensing. Supply: Navitas

“Our GaN focus is on built-in gadgets that allow high-efficiency, high-performance energy conversion with the best designs and the shortest potential time-to-market,” stated Reyn Zhan, senior supervisor of technical advertising and marketing at Navitas. The GaNSlim gadgets are rated at 700 V with R_DS(ON) scores from 120 mΩ to 330 mΩ.

Evolution of a GaN machine

In an interview with EDN, Llew Vaughan-Edmunds, senior director of product administration and advertising and marketing at Navitas, chronicled the corporate’s GaN expertise journey. Within the late 2010s, when most GaN suppliers have been providing discrete gadgets, Navitas differentiated by integrating drivers, management and safety options alongside discrete GaN.

“The issue is that GaN change may be very quick, so whereas you should use it to your profit, when gate begins to modify that quick, you inevitably see spikes,” stated Edmunds. “On the identical time, the gate may be very delicate, so it’s essential to regulate gate voltage as a lot as potential.” In any other case, if the machine voltage is 5 V and it goes to 7 V, it’s harmful.

The GaNFast machine was created by integrating a gate driver, and it considerably took off in journey adapters. Almost three years later, in 2021, Navitas realized what OEMs and ODMs wished. “They wished sensing and over-temperature safety, and that’s once we launched GaNSense,” Edmunds advised EDN.

“Now, after a number of years of launch, we perceive what the subsequent necessities are, and this grew to become GaNSlim,” Edmunds added. “Energy design engineers need to cut back the warmth and temperature, and so they desire a larger, thermally enhanced package deal with the pitch between legs widened.”

Determine 2 GaNSlim, an improve to the GaNSense design, incorporates EMI management and loss-less present sensing alongside the gate driver and numerous safety options. Supply: Navitas

Anatomy of GaNSlim

Furthermore, as Edmunds famous, energy design engineers wished Navitas to combine the EMI perform into the change. “What occurs with the journey adapters is that many EMI points must be labored round as a result of the change is so quick.”

Determine 3 GaNSlim design includes three fundamental constructing blocks: FET change, gate driver IC, and thermally enhanced DPAK package deal. Supply: Navitas

There are three fundamental constructing blocks of a GaNSlim machine. First, the GaNSense Energy FET is the GaN change, a quick one, which permits loss-less present sensing. That, in flip, eliminates the necessity for exterior present sensing resistors and optimizes system effectivity and reliability.

Second, the GanSlim energy IC, which integrates the gate driver and bolsters loss-less present sensing with programmable options. “We’ve got loss-less sensing, that means we do the sensing contained in the IC, bringing half p.c effectivity advantages,” Edmunds added.

It additionally incorporates over-temperature safety to make sure system robustness, and its auto sleep-mode will increase mild and no-load effectivity. Then there may be autonomous turn-on/off slew charge management, which maximizes effectivity and energy density whereas decreasing exterior element depend.

Third, the 4-pin, 6.6 x 9.6 mm DPAK package deal facilitates 7°C decrease temperature operation versus standard alternate options whereas supporting high-power-density designs with scores as much as 500 W.

GaN integration a differentiator

When summarizing GanSlim design, Edmunds stated that Navitas took the 10-pin GaNSense I/O system and made it into three to 4 I/O techniques. “We’ve got built-in EMI management contained in the change and made it clever, eradicating just a few elements and thus decreasing the system price.” That’s how Navitas made GanSlim easier and simpler to make use of.

Edmunds added that engineers don’t have to fret about EMI, totally different I/Os, and find out how to management them with a micro as a result of that’s all arrange. He’s additionally assured that with these integration capabilities and controlled EMI, Navitas is forward of competitors by three to 4 years.

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• Design Environment friendly, Excessive-Density Energy Options with GaN
• A GaN expertise breakthrough claimed for onerous switching
• Girls in STEM: GaN’s Affect on Energy Electronics Design

The publish The subsequent GaN design frontier: EMI management appeared first on EDN.

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