TransphormHighest Performance, Highest Reliability GaN

Higher efficiency.
Higher power density.
Lower system cost.
New system design opportunities.
This is the GaN Revolution.

Backed by customer commentary and published metrics, Transphorm’s high-voltage GaN FETs move power electronics beyond Silicon’s limitations.


An Independent View

The Verge Science Team takes an in-depth look at GaN, exploring the wide bandgap semiconductor material’s ability to increase power efficiency and, ultimately, displace Silicon as the next go-to power conversion solution.

Customer Innovations

Transphorm’s customer base includes product manufacturers unsatisfied with the status quo. Companies on the bleeding edge of innovation that strive to break their own power system performance records, raising the bar industry-wide. Gallium nitride power transistors are proving to be their disruptive technology of choice.

Spotlight: Customer Products in Production

Inergy’s Kodiak Extreme utilizes a photovoltaic (PV) inverter and battery charger both integrating Transphorm’s JEDEC-qualified GaN platform. These power systems result in a generator that is more powerful, lighter, and quicker to charge than competitive products.

TDK-Lambda’s redesigned standard power module uses a bridgeless totem-pole power factor correction topology to optimize Transphorm’s TPH3206LDG FET in an 8×8 PQFN package.

Aviation electronics supplier AES produces two disruptive SMPS’s that use Transphorm’s GaN. The PS250X (500 W) and PS6120 (1.2 kW) PSUs consistently outperform competitive systems with higher efficiency in lower weight form factors.

Bel Power Corsair Delta
Telcodium Yaskawa

Disruptive Reliability and Performance

High quality, high reliability GaN in standard TO-XXX packages.

Transphorm’s GaN FETs switch up to 4x faster than Silicon solutions. Further, unlike Si MOSFETs, the GaN transistors are inherently bi-directional and optimized in a bridgeless totem-pole power factor correction design.


Transphorm commits to producing the market’s highest quality, highest reliability high-voltage GaN devices.

Our third generation platform demonstrates that commitment. Gen III 650 V FETs offer the highest threshold voltage (4 V) and gate robustness (±20 V) available today.

For more information, the Reliability Lifecycle of GaN Power Devices paper includes published data on our JEDEC and AEC-Q101 qualified technology.

Cascode vs. e-mode

Our Q+R is in large part enabled by our design choice. Today, cascode is the only configuration proven to enable GaN in real-world applications. Transphorm’s GaN is backed by extensive lifetime, quality and reliability data—unavailable with other configurations today, such as pGaN e-mode.

Not all GaN is alike.

Comparing Transphorm cascode to today’s e-mode.

Attribute Cascode (Transphorm)* e-mode (market)*
Quality, reliability, lifetime performance Extended JEDEC, AEC-Q101, lifetime testing Limited data
Device breakdown voltage (TJ = 150°C) 650 V (qualified), 1200 V (measured) 500 V and 600 V (measured
Maximum transient protection 800 V 750 V
Gate drive safety margin (RON @ VGS) 10 V 1 V
Gate drive noise immunity 4.0 V (typical) 1.7 V (typical)
Negative gate drive required No Yes
Slew rate control Yes Yes
Reverse conduction operation (VSD) 2.2 V to 2.6 V 6 V to 9 V (defined by gate drive)
Saturation current limit (TJ = 150°C) > 3x higher than e-mode Reduced channel and gate charge
Paralleling Up to two TO-XXX devices More than two devices possible
FOM (RON * QOSS) Industry standard Minimal increase with reduced Q+R
Die size Industry standard Smaller with reduced Q+R
Thermal performance (72 mΩ) 50°C at 1500 W
83°C at 2526 W
80°C at 1500 W

*Unless specified, data is based on a 50 mΩ device.


High-voltage GaN technology benefits numerous markets that require reliable higher efficiency, higher performance power conversion. The highest adoption rates are projected for the following application areas:

Infrastructure and IT
Power Supplies

Increases clean power output in standardized server and telecom form factors.

Consumer and Computing
Adapters, Gaming Power Supplies

Improved efficiencies result in lower thermals, improved power density and lower system cost.

Broad Industrial
Battery Chargers, UPS

Reduces size and weight of systems that run industrial factories, charge battery powered forklifts, electric vehicles and keep critical data accessible..

EV and Charging

Generates longer distance per charge with a lower overall system cost.

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