Silanna Semiconductor and Smarter Living Collaborate on World's Smallest In-Wall 65W GaN Charger


Compact, full-power USB charger built on industry’s most integrated and efficient active clamp flyback (ACF) controller supports USB PD and PPS fast charging

Silanna Semiconductor, The Power Density Leader, and smart socket outlet specialist Smarter Living, have announced the world’s smallest 65W in-wall GaN (gallium nitride) fast charger. Measuring just 42mm x 42mm x 30mm, the new 3510PDFE charger is built around Silanna’s SZ1131 active clamp flyback (ACF) controller and is the first in a series of small form factor wall sockets that Smarter Living will be providing for global markets.

Smarter Living’s 3510PDFE 65W charger provides a single USB output, delivers power delivery (PD) voltage outputs of 5V, 9V, 12V, 15V and 20V and supports Programmable Power Supply (PPS) charging. Output currents are up to 3.25A. The socket is designed for fixed installations and is fully compliant with international IEC-EN 62368-1 electrical safety standards.

Featuring the industry’s highest level of integration, Silanna’s SZ1131 incorporates an adaptive digital PWM controller, ultra-high-voltage (UHV) active clamp FET, active clamp gate driver and startup regulator. Efficiencies of up to 95% across universal (90Vac – 265Vac) input voltages and varying loads and ultra-low no-load power of less than 20mW enable smaller form factors and reduce overall energy consumption.

The 3510PDFE  has been tested by third-party testing laboratory DEKRA in accordance with the latest IEC and EN test requirements to demonstrate full compliance with current low voltage and EMC directives. Future products in the Smarter Living wall-mounted USB charger series will include 30W and 45W options with single and dual USB Type-C ports.

A member of Silanna Semiconductor’s family of CO2 Smart Power technologies, the SZ1131 addresses the ultimate power management challenge facing engineers by simplifying design and improving performance while addressing environmental sustainability goals through more efficient energy use. The controllerprovides the ease-of-design of a simple flyback controller with all the benefits of an ACF design, including recycling the leakage inductance energy of the flyback transformer and limiting the primary FET drain voltage spike during the turn-off events. Employing Silanna Semiconductor’s OptiMode digital control architecture, the SZ1131 adjusts the device’s mode of operation on a cycle-by-cycle basis to maintain high efficiency, low EMI, fast dynamic load regulation, and other key power supply parameters in response to varying line voltage and load.

3510PDFE Key Features

·       Input voltage range: 220-250Vac

·       Input terminals: screw terminals feasible for flexible and rigid supply wiring

·       Over voltage category: OVC III

·       Output power: 65W

·       Output voltages: 5.0/9.0/12.0/15.0 and 20.0Vdc

·       Output current: 3.0A and 3.25A

·       Profiles: USB-C PD and PPS

·       Dimensions: 42x42x30mm

·       Method of installation: for fixed permanent installations

·       Certification: IECEE CB-Scheme, KEMA-KEUR and VDE (Pending)

SZ1131 Key Features

·       Integrated UHV active clamp FET, active clamp driver and start-up regulator

·       Capable of over 95% efficiency

·       Flat efficiency across universal (90Vac to 265Vac) input voltage and load

·       < 20mW system no-load power consumption

·       OptiMode cycle-by-cycle adaptive digital control

·       Self-tuning valley mode switching (VMS)

·       Multi-mode operation (burst mode, QR, VMS)

·       > 6 dB EMI margin

·       OTP, OVP, OCP, OPP, output short circuit and transformer saturation protection

·       Up to 65W output power with universal input and 100W+ output power with front-end PFC

·       16-pin SOIC package

·       CO2 Smart Power by Silanna Semiconductor 


The 3510PDFE is available now in limited quantities for sampling. General market availability is scheduled for September 2022.

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