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Transphorm demonstrates a bidirectional SuperGaN power supply with new reference design for e-mobility and energy/industrial markets

Transphorm has released a new 300 W DC-to-DC GaN reference design for 2- and 3-wheeled electric vehicle battery chargers. The TDDCDC-TPH-IN-BI-LLC-300W-RD design uses TP65H150G4PS 150 mOhm SuperGaN FETs in a TO-220 package to power a high performing, high efficiency energy harvesting and distribution battery charging system.

The new board notably demonstrates one of the most anticipated value propositions of a GaN power supply: bidirectionality. This capability indicates that a single power system can deliver power in two directions from input (AC) to output (DC) and output (DC) to input (AC) depending on system needs, with GaN enabling energy efficiency in both conversions.

The first value proposition of GaN in high power applications was realized by the highly efficient operation of the bridgeless totem-pole power factor correction circuit. This subsequently led to the next level of benefits across a variety of topologies, including overall smaller and lower-cost power systems across the full power conversion spectrum, from 30 watts to over 10 kilowatts.

Continuing the leadership of Transphorm GaN in higher power applications, we have now demonstrated bidirectional power conversion that can be used by vehicle on-board chargers for e-mobility, renewable energy and backup power systems, and other power supply applications requiring highly integrated, interchangeable input and output terminals.

—Primit Parikh, President and CEO, Transphorm

Bidirectionality is a core capability required to advance V2X (vehicle-to-everything) infrastructure for e-mobility applications that comprise V2L (vehicle-to-load), V2H (vehicle-to-house), and V2G (vehicle-to-grid) scenarios, which represent a projected overall V2X system market size ranging from a conservative US$9 billion to an aggressive $70 billion by 2030.

The TDDCDC-TPH-IN-BI-LLC-300W-RD board is a fully analog implementation without complex firmware development for the power stage. This design configuration enables simpler and faster power system development.

Topology Full-Bridge LLC
Convection Cooling Natural convention without forced air
Output Power 300 W
Output Voltage 48 V/6 A, 380 V/0.9 A
Peak Efficiency 97.3%
Power Density 36.5 W/in3

The TDDCDC-TPH-IN-BI-LLC-300W-RD board is suited for high power density applications such as the DC-to-DC power stage of bidirectional DC-to-AC inverter power supplies used in energy harvesting applications with solar-, battery- and/or grid-tied solutions as well as AC-to-DC power supplies used in 2-, 3-, and 4-wheeler battery chargers.


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