Silanna Semiconductor has unveiled the latest addition to its family of AnyPort fully integrated reference designs that provide everything an engineer needs to prototype and test fully functional multi-port fast charger applications rapidly. 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 300 mW 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.

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.

RD-35 Key Features include: 65W 1C1A high-power-density AnyPort reference design with standard Superjunction FET; > 92% peak efficiency; Flat efficiency across universal (90 – 265Vac) input voltage and load; Uses Silanna Semiconductor’s newest fully integrated ACF controller (SZ1131); SZ1131 integrates ACF controller with UHV active clamp FET, active clamp driver, and start-up regulator; Up to 146kHz switching frequency operation; OptiMode cycle-by-cycle adaptive digital control; Self-tuning valley mode switching (VMS); Multi-mode operation (burst mode, QR, VMS); < 30mW system no-load power consumption for up to 65W single port (1C) designs; OTP, OVP, OCP, OPP, and output short circuit protections; Space-saving 16-pin SOIC package; Uses Silanna Semiconductor’s high-voltage, high-efficiency 65W integrated buck converter (SZPL3102A); Synchronous buck regulator with switching frequencies up to 2MHz; Optimal high efficiencies for 3.3V to 21V VOUT; Maximum output current of 3.25A; Wide input voltage range: 7V to 27V; Selectable soft start times; OCP/OVP/OTP protection; Programmable UVLO; 3mm x 3mm QFN package; CO2 Smart Power by Silanna Semiconductor;

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