Press Kit SZ1105

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65W Fully Integrated

Active Clamp Flyback Controller

SZ1105 all-silicon design combines simplicity of flyback controllers with power density enabled by active clamp flyback controllers, yields over 94% efficiency and 25W/in  power density for 65W AC/DC power adapters.


SZ1105 PCB Front Side

SZ1105 PCB Back Side

For High Power Density AC/DC Power Adapters

SZ1105 65W controller combines four key ACF components: an advanced adaptive digital ACF controller and three ultra-high-voltage (UHV) components – an active clamp MOSFET, an active clamp FET driver and a startup voltage regulator. This unprecedented level of integration facilitates designing efficient, high-power-density AC/DC power adapters with low bill-of-material (BOM) cost. The 65W SZ1105 is suited for designing slim and compact adapters for powering notebooks, video game consoles and multi-port wall chargers.

SZ1105 reduces BOM cost not only by integrating the ACF circuit, but also by enabling designers to use a lower-cost transformer, SR FET, clamp capacitor and input filter.

Key Specs:

  • Input: 90 – 265 VAC

  • Output: 5V/3A, 9V/3A,15V/3A, 20V/3.25A

  • Output Power: 65W Max

  • Output Port: USB-PD 3.0 or PPS

  • Efficiency: > 94% full power efficiency with an all silicon design



Key Features:

  • Integrated ultra-high-voltage active clamp FET/ driver/startup voltage regulator

  • Advanced adaptive digital controller 

  • Tight switching frequency regulation for improved input EMI filter utilization

  • Cycle-by-cycle adaptive digital control (OptiMode   )

  • Up to 65W output power

  • Capable of over 25W/in  power density 

  • 16-pin SOIC package

  • Meets DoE and CoC efficiency and no-load standby power requirements




High-power-density capabilities help designers overcome the thermal challenges of packing ever-increasing amounts of power into the small-form-factor power adapters that consumers have come to expect that also remain cool to the touch. High efficiency, or reducing power loss, is key to achieving the power density without overheating the adapter’s case. With an easy-to-use simple flyback controller and an all-silicon design, SZ1105 delivers over 94% efficiency at 20V/3.25A, and over 25W/in  power density at full 65W output power, while using an industry-standard, avalanche-rated silicon MOSFET main switch. 


Press Contacts

Moody and Associates PR

Bill Moody:

Michelle Moody:

Phone: 214.363.3460

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High Resolution Visuals

SZ1105 Key Features

Efficiency 115VAC

Four Key Components

SZ1105 PCB Back

SZ1105 PCB Front

SZ1105 PCB Front/Back Side

Efficiency 230VAC

SZ1105 PCB Back 2

SZ1105 Product Video

Silanna Logo Horizontal

Silanna Logo Vertical





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