InnoSwitch Family

The InnoSwitch™ Family of ICs combines primary, secondary and feedback circuits in a single surface-mounted off-line flyback switcher IC. The InnoSwitch IC incorporates the primary FET, the primary-side controller, a secondary-side controller for synchronous rectification and an innovative new FluxLink™ technology that eliminates the need for an optocoupler. InnoSwitch3-Pro enables dynamic control of output voltage and current, along with other configurable protection features, through a simple I2C interface.

Power Integrations’ FluxLink™ communication technology enables feedback information to be delivered across an isolation barrier without the use of any magnetic materials. FluxLink delivers a very high communication bandwidth which enables a much faster load-transient response. It is also highly reliable and does not suffer from the typical optocoupler degradation mechanisms. It is embedded into the package and by eliminating bulky optocouplers, it saves space and increases power density, which is particularly beneficial for adapters and chargers. Furthermore, this proprietary technology meets all global noise immunity standards. For safety, it complies not only with UL and TUV global isolation standards but also the more stringent CQC 5,000 meter Chinese safety standard.

InnoSwitch3-MX is intended to be used with InnoMux controller IC for multiple output, single-stage power supplies for monitors and TVs. This enables very high system efficiency on a small PCB foot print.

InnoSwitch Family Comparison Table

Power LevelUp to 65 WUp to 65 WUp to 65 WUp to 45 WUp to 50 W
MOSFET Rating650 V/725 V650 V650 V/725 V725 V/900 V650 V/725 V
Target Applications

USB-PD & PPS/QC Adapters
Multiprotocol adapters including QuickCharge, AFC, FCP, and SCP
Direct-charge Mobile Adapters
Tool Chargers
General Purpose Battery Chargers

Internet of Things (IoT)
LCD Monitors
Notebook Adapters
Power Tools
Set-Top Boxes
USB-PD & Fast Chargers
Internet of Things (IoT)

High and Unstable
 Mains Voltage
Industrial Controls
Major Appliances
Motor Controls
PC Standby
Small Appliances
Utility/Smart Meters

LCD Monitors
Cable Drop Compensation
Line OV/UV Protection
Output OVP 
Constant Power Profile  
I2C Interface   
Dynamically Adjustable Voltage & Current   
Telemetry Status   
Configurable Protection Features   
Compatible with InnoMux Controller IC