Power IntegraTIons Inc. recently unveiled the InnoSwitch ™ 3 Series Constant-Current Off-line Flyback Switching Power ICs, delivering 94% efficiency at any input voltage and load condition, drastically reducing power losses by 25% and enabling Design a compact 65 W power supply without heatsink.

InnoSwitch3 devices are suitable for demanding power supplies, frame sizes, or thermal constraints, especially those that must meet the mandatory Total Power Consumption (TEC) standard.

The InnoSwitch3 IC product family is currently available in three versions for three specific applications:

CE: External current. The use of external output current sense provides accurate constant current / constant voltage regulation for increased design flexibility. Ideal for compact chargers, adapters, Internet of Things and building automation applications with a single output voltage.

CP: Constant power. Suitable for USB power transfer (PD), fast charging, and other applications that require dynamic output voltage.

EP: Embedded Power. Incorporating the highest rated MOSFET (725 V) in the series, it offers full input voltage and load protection with excellent multi-output cross-regulation for demanding industrial control and home appliance applications.

So switching power supply IC is how to achieve high performance conversion?

Shyam Dujari, product director at Power InregraTIons, said: "An integral part of traditional flyback switching power supplies is the optocoupler, which is used to carry the electrical signals between the primary and secondary circuits, and the first FluxLink digital feedback technology Eliminating the need for optocouplers, the principle is placed on both sides of the chip PIN pin coil, the use of magnetic induction coupling signal transmission.This not only saves the optocoupler this cost, the signal transmission efficiency Improve, realize extremely fast dynamic response speed.In addition, InnoSwitch 3 also adopted CCM and quasi-resonant switch patented technology to further improve the power conversion efficiency. "

These new flyback switching power ICs feature Power IntegraTIons' innovative, isolated digital communications technology, FluxLink ™, with synchronous rectification, quasi-resonant switching, and accurate secondary-side feedback detection and control circuitry. These features enable high-efficiency, high-accuracy, and high-reliability power circuits without optocouplers.

It is understood, InnoSwitch 3 uses InSOP-24 package, not only provides a thin solution for efficient cooling, and the primary side and secondary side creepage distances and clearances up to 11.5mm, higher reliability, surge and ESD More capable, can easily meet China's 5,000 meters elevation (9.5mm clearance) CQC requirements.

Shyam Dujari, product director at Power Inregrations, said: "Shyam Dujari is even more efficient than our more efficient InnoSwitch, further reducing heat loss by 25% and designing a compact 65W power supply with no heatsink. "Better heat dissipation helps to improve component life and product reliability. "

InnoSwitch3 IC brings the latest, state-of-the-art technology to flyback power supply designs. These new devices are more efficient than the previously highly efficient InnoSwitch products, further reducing the losses by 25% and providing consistently high performance at any input voltage and load condition. The InnoSwitch3 IC solution features an extremely simple system and a small number of components, enabling extremely compact and highly reliable power supplies for a wide range of applications.

In addition, InnoSwitch3 devices are CCC, UL and VDE certified for safety and can be safely connected to the isolation barrier. The InSOP ™ -24 package offers a thin profile for efficient heat dissipation with a wider 11.5 mm creepage and clearance on the primary and secondary sides, higher reliability, surge immunity and ESD capability.