100W multi-port fast charger reference design is production-ready
A production-ready AnyPort design, available from Silanna Semiconductor includes a front-end PFC converter stage and combines active clamp flyback (ACF) controllers, high power-density DC/DC converters and GaN power switch.
The RD-16 is the latest member of the company’s family of fast charger reference designs and is its first 100W multi-port offering. The RD-16 is built around Silanna’s CO2 Smart Power AC/DC controllers and high frequency DC/DC converters. It integrates a front end PFC (power factor correction) for a high power density of 14W/inch3 uncased, efficient, production-ready design for multi-port 100W USB-PD applications delivering currents up to 5A.
The GaN-based RD-16 is designed to simplify and speed charger development; it provides everything an engineer needs to rapidly prototype and test a fully functional 100W 2C1A multi-port unit, said the company. Its design is based on the AnyPort architecture, which offers 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. The single base charger design can be deployed across a variety of end products with different output configurations. AnyPort can significantly reduce the complexity of fast chargers and adapters with multiple Type-C and/or Type-A output ports.
The RD-16 incorporates Silanna’s SZ1131 integrated AC/DC ACF controller and its SZDL3105 and SZPL3102S high voltage, high efficiency integrated buck converters offering ratings of 100W and 65W respectively. End-to-end peak efficiency exceeds 92 per cent and is relatively flat across the universal input voltage range of 90 to 265V AC. The reference design exceeds conducted and radiated EMI requirements and eliminates the need for pre-production validation and certification, to accelerate the production cycle.
Other key features are switching frequency operation up to 146kHz, an OptiMode cycle-by-cycle adaptive digital control, self-tuning valley mode switching (VMS), multi-mode operation (burst mode, QR, VMS) with over temperature, over voltage, over current and output short circuit protection.
The reference design is supplied in a space saving 16-pin SOIC. It will provide designers with tools and support to rapidly develop high efficiency, small form factor, low component counts fast chargers, said the company. Ahsan Zaman, Silanna Semiconductor’s, director of product marketing, commented: “By combining our CO2 Smart Power family of advanced AC/DC and DC/DC technologies with GaN power switching and . . . 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.”
The RD-16 joins Silanna’s family of production-ready reference designs to develop high-density chargers with low operational and no-load/ stand-by power consumption and minimum component count, bill of materials cost and size. The portfolio includes all-silicon 33W and 45W solutions and silicon- and GaN-based single- and multiple-output 65W USB-PD reference designs. Full availability of PCB Gerber and production files further reduces the time from prototyping to full production.
