100W multiport GaN fast charger reference design with PFC
Silanna Semiconductor has developed its first 100W multiport fast charger reference design using its AC-DC controller and high-frequency DC-DC converter.
The RD-16 reference design integrates a front-end PFC converter stage and is production-ready for multi-port 100W USB-PD applications delivering currents up to 5A with an uncased power density of 14W/in3.
The design uses gallium nitride (GaN) transistors switching at 146MHz and Silanna worked with Innoscience to support rapidly prototyping and testing of a fully functional 100W 2C1A multi-port unit.
Using the AnyPort architecture provides the flexibility to complete a charger design for a given power level prior to specifying and configuring the specific number and type of output ports.
Allowing a single base charger design to be deployed across a variety of end products with different output configurations can significantly reduce the complexity of fast chargers and adapters with multiple Type-C and/or Type-A output ports.
The RD-16 brings together Silanna’s SZ1131 fully-integrated AC-DC active clamp flyback (ACF) controller and the company’s SZDL3105 and SZPL3102S high-voltage, high-efficiency integrated buck converters offering ratings of 100W and 65W respectively. This provides OptiMode cycle-by-cycle adaptive digital control and self-tuning valley mode switching (VMS).
End-to-end peak efficiency exceeds 92% and is relatively flat across the universal input voltage range (90 – 265Vac). Because the reference design exceeds conducted and radiated EMI requirements, it eliminates the need for pre-production validation and certification, speeding up the production cycle.
“Our aim is to provide designers with all the tools and support they need to rapidly develop high-efficiency, small form factor, low component counts fast chargers,” says Ahsan Zaman, Silanna Semiconductor’s, Director of Product Marketing.
“By combining our CO2 Smart Power family of advanced AC-DC and DC-DC technologies with GaN power switching and our innovative and flexible AnyPort architecture the RD-16 offers the fastest possible route from prototyping to full production for 100W fast chargers with any number or type of output ports.”
Silanna is showing the reference design at the APEC 2023 exhibition in Orland, Florida, next week.
powerdensity.com/reference-design/
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