Silanna Semiconductor expands multi-port fast charger reference design portfolio

Built around Silanna’s CO2 Smart Power advanced AC/DC controller and high-frequency DC/DC converter technology and featuring a super-junction FET, the RD-35 simplifies and speeds the development of low-energy consumption multi-port 65W fast chargers offering USB Type-A and Type-C functionality.

Silanna’s RD-35 is a high-power-density, ultra-efficient, production-ready solution for multi-port 65W USB-PD applications delivering currents up to 3.25A. Operating efficiency greater than 92% minimizes power consumption during charging, while no-load consumption of less than 300mW reduces standby power. Efficiency is relatively flat across the universal (90–265Vac) input voltage range and low-to-full-load conditions.

The RD-35 combines Silanna’s SZ1131 fully-integrated AC/DC active clamp flyback (ACF) controller and the company’s SZPL3102A high-voltage, high-efficiency integrated 65W buck converter. 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. This allows a single base charger design to be deployed across a variety of end products with different Type-C and Type-A output configurations. Time-to-market is further reduced as the RD-35 exceeds conducted and radiated EMI requirements, eliminating the need for pre-production validation and certification.

“Manufacturers are looking to create multi-port fast chargers that address stringent performance, power density and efficiency requirements within tight time-to-market deadlines,” says Ahsan Zaman, Silanna Semiconductor’s Director of Product Marketing. “In line with our other production-ready reference designs, the combination of Silanna’s CO2 Smart Power family of advanced AC/DC and DC/DC technologies and the innovative AnyPort architecture enables engineers to reduce the time needed to develop and test 65W 1C1A multi-port designs and ensure the fastest possible route from prototyping to full production.”

The RD-35 is the latest addition to Silanna’s comprehensive family of production-ready reference designs that provide everything needed to develop high-density chargers with low operational and no-load/standby power consumption and minimum component count, BOM cost and size. This family includes all-silicon 33W and 45W solutions and silicon- and GaN-based single- and multiple-output 65W and 100W USB-PD reference designs.

Full availability of PCB Gerber and production files further reduces the time from prototyping to full production.