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 a high-voltage primary-side switch, the primary-side controller, a secondary-side controller for synchronous rectification and an innovative new FluxLink™ technology that eliminates the need for an optocoupler.

PowiGaN™ is Power Integrations’ internally developed gallium nitride (GaN) technology. PowiGaN switches replace the traditional silicon transistors on the primary side, reducing switching losses and enabling power supplies that are more efficient, smaller and lighter than silicon alternatives. PowiGaN-based ICs achieve up to 95% efficiency across the full load range and up to 100 W in enclosed adapter implementations without requiring a heatsink.



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. 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.

InnoSwitch Family Comparison Table

ProductInnoSwitch3-ProInnoSwitch3-CEInnoSwitch3-CPInnoSwitch3-EPInnoSwitch3-MX
Data Sheet
Power LevelUp to 100 WUp to 65 WUp to 100 WUp to 100 WUp to 85 W
Switch Rating650/725/750 V650 V650/725/750 V725/750/900 V650/725/750 V
Parts Incorporating PowiGaN™ TechnologyINN3378C
INN3379C
INN3370C
INN3278C
INN3279C
INN3270C
INN3678C
INN3679C
INN3670C
INN3478C
INN3479C
INN3470C
Target Applications

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