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.

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.

InnoSwitch provides both accurate constant voltage (CV) and constant current (CC) while maintaining high efficiency across the load range. This is helpful in smart lighting where the CV capability may be used to power controllers and network interface devices, while the CC capability drives the LEDs, Lighting control is achieved by modulating the feedback pin using a PWM signal.

InnoSwitch Family Comparison Table

ApplicationLED/Drivers, Smart LightingLED/Drivers, Smart Lighting
Voltage Rating650 V725 V / 900 V
Over Current Protection (OCP)2 Amp Internal OCPExternal sense resistor for accurate OCP control
Line Over-Voltage/Under-Voltage ProtectionNAYes
Cable Drop Compensation0% or 6%0 %