All Silicon 65W USB-PD Reference Design with >94% Efficiency  

San Diego, CA – December 3rd, 2020 – Silanna Semiconductor, The Power Density Leader, today announced a breakthrough 65W USB-PD reference design, achieving 30W/inch3 uncased power density and over 94% efficiency from an all-silicon design for a universal input AC/DC power adapter, utilizing their expanded portfolio of Active Clamp Flyback Controllers (ACF). Silanna Semiconductor focuses on the ultimate power management challenges with the best-in-class power density and efficiency that delight customers with unprecedented BOM savings. The full production release of the SZ1130 ACF PWM controller was announced in September and this new 65W USB-PD reference design demonstrates performance results utilizing all-silicon system design know-how.

The 65W USB-PD reference design, supporting 5V/3A, 9V/3A, 15V/3A and 20V/3.25A output voltages, targets a wide range of consumer power adapter applications. The technical sales team has been working directly with customers, demonstrating the advantages of Silanna Semiconductor’s ACF controllers by delivering the best-in-class efficiency and the highest power density with reduced BOM costs from all-silicon designs.

“Customers are delighted to know that our 65W USB-PD reference design is capable of delivering higher performance in a smaller form factor for their design needs” said Ahsan Zaman, Director of Marketing. “The reference design demonstrates how well-suited the SZ1130 is for high efficiency and high power density AC/DC power adapters. SZ1130 is designed for up to 65W output power, including USB-PD and Quick Charge applications.”

SZ1130 devices are ACF controllers that integrate an adaptive digital PWM controller and the following Ultra High-Voltage (UHV) components: an Active Clamp FET, Active Clamp Gate Driver, and a Startup Regulator.  This unprecedented integration level facilitates designing efficient, high power density adapters with low BOM cost to satisfy power-hungry mobile phones, tablets, notebooks, and video game consoles. 

The SZ1130 is fully supported by the Silanna Semiconductor’s Asian Center of Excellence (ACE) design support center. All this, alongside the extensive AC/DC and DC/DC products are available at the demo room at

SZ1130-based AC/DC power supplies easily meet the stringent DoE and CoC efficiency and no-load standby power requirements.

Key Features:

  • Integrated UHV Active Clamp FET, Active Clamp Driver, and Start-up Regulator
  • Capable of Over 94% Efficiency
  • Flat Efficiency Across Universal (90 – 265Vac) Input Voltage and Load
  • 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)
  • > 6dB EMI Margin
  • OTP, OVP, OCP, OPP, and Output Short Circuit Protections
  • < 75mW System No Load Power Consumption
  • 65W Output Power

Availability and Pricing:

Sample information and live demonstrations are available at For pricing inquiries, contact

About Silanna Semiconductor: The Power Density Leader. Delivering on the ultimate Power Management challenge of best-in-class power density and efficiency performance that delights customers with unprecedented BOM savings. Silanna Semiconductor’s AC/DC and DC/DC power converter ICs are driving key innovations in Travel Adapters, Laptop Adapters, Appliance Power, Smart Metering, Computing, Lighting, Industrial Power, and Display Power utilizing the latest digital and analog control and device technologies. In addition to our global engineering sales force, customers are supported by regional design centers and online tools. ‘Power Density Hero’ is an online design tool where customers input their power needs and instantly receive a complete design, schematic, and ‘Bill of Materials’ (BOM). The Asian Center of Excellence (ACE) has a dedicated team of power system engineers to support our customers in their application specific design needs. Silanna Semiconductor, headquartered in San Diego, CA, is a privately-held semiconductor company, and has global facilities supporting customers with design centers and offices in North America, Europe, Asia, and Australia.

PR Contact:

Press Kit “Less than a year ago, we launched the SZ1101, the world’s first fully integrated Active Clamp Flyback Controller, to an incredible customer and industry response,” said Mark Drucker, CEO of Silanna Semiconductor.  “This expansion into higher power and smaller form factors speaks to our core power density leadership.  Silanna Semiconductor delivers AC/DC solutions with the highest Power Density and Efficiency while simultaneously delivering the greatest value and reduced BOM costs.”