\u201cGaN\u2019s adoption in the EV market is rapidly advancing. This is largely driven by the technology\u2019s high-power density with cost-effective, high-yield manufacturing process when compared to alternative options such as Silicon Carbide or Silicon,\u201d said Tushar Dhayagude, Vice President of Worldwide Sales and FAE, Transphorm. \u201cSpecifically, our SuperGaN devices have achieved significant traction in two and three wheelers as they exhibit those advantages along with system and device-level cost benefits versus select Silicon solutions. Based on consistent customer design requests, we\u2019re excited to release reference designs that can help on- or off-board charger manufacturers speed up go-to-market with GaN-based systems that can increase the performance and overall usability of next generation vehicles.\u201d<\/p>\n
What is CC\/CV?<\/b><\/p>\n
The Constant Current\/Constant Voltage (CC\/CV) lithium-ion battery charging method uses constant current in the initial stage of charging and then switches to constant voltage in later stages of charging when the battery reaches the set charge level. This ensures batteries are not overcharged.<\/p>\n
Open-Frame CC\/CV AC-to-DC Battery Chargers<\/b><\/p>\n
The 300 W and 600 W reference designs pair the SuperGaN FETs and controllers in the popular power factor correction (PFC) and resonant LLC topologies, with the LLC being specifically designed for a wide battery range (from empty to full charge). Transphorm\u2019s SuperGaN platform enables power system developers to maximize the PFC+LLC\u2019s performance potential, delivering the highest efficiency possible from these topologies at a competitive cost.<\/p>\n
The reference designs use pure analog controllers versus digital controllers that require firmware. This configuration offers several benefits such as easier designability and simplified product development driven by:<\/p>\n
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- Reduced development resource requirements.<\/li>\n
- Reduced development time.<\/li>\n
- Elimination of the need for potentially complex firmware programming\/maintenance.<\/li>\n<\/ul>\n
Note: The 300 W reference design includes an additional PWM input port for requesting output current levels lower than rated output value, enabling further flexibility for all battery chemistries.<\/p>\n
Key specifications follow:<\/p>\n
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