Power Integrations has just launched the InnoSwitch™5-Pro family of high-efficiency, programmable flyback switcher ICs. This groundbreaking single-chip switcher, with a focus on achieving over 95 percent efficiency, introduces a novel secondary-side control scheme, enabling zero-voltage switching (ZVS) without the need for an additional high-voltage switch.
Effortless Efficiency with InnoSwitch5-Pro
The InnoSwitch5-Pro family features a 750 V or a 900 V PowiGaN™ primary switch, primary-side controller, FluxLink™ isolated feedback, and secondary controller with an I2C interface. This combination optimizes the design and manufacturing of compact, highly efficient single- or multi-port USB PD adapters, catering to applications like notebooks, high-end cellphones, and other portable consumer products.
A Power Supply Revolution
Adnaan Lokhandwala, senior product marketing manager at Power Integrations, describes the synergy of zero-voltage switching and GaN technology as “power supply magic.” The implementation of ZVS and GaN technology eliminates switching losses, allowing for super-dense adapter layouts with significantly fewer components compared to alternative circuits. For instance, the demonstration of a 140 W / 28 V USB PD adapter in just 4.2 cubic inches with 106 components showcases the efficiency of the InnoSwitch5-Pro ICs.
Simplicity in Design and Operation
The flyback topology utilized by InnoSwitch5-Pro ICs offers a more straightforward implementation compared to asymmetric half-bridge (AHB) circuits. Moreover, these ICs can operate from universal mains with or without a PFC stage. Lossless input line voltage sensing on the secondary side enhances adaptive DCM/CCM and ZVS control, simplifying design across various line and load conditions.
Unlocking Possibilities in Power Conversion
The InnoSwitch5-Pro family targets key markets such as high-density USB PD 3.1 Extended Power Range (EPR), UFCS, multi-protocol adapters, notebook adapters, and after-market single- and multi-port chargers. The ICs’ excellent efficiency, surpassing 95 percent, empowers designers to eliminate heat sinks, spreaders, and potting materials for thermal management, thereby reducing size, weight, component cost, and manufacturing complexity.
Conclusion
With pricing starting at $2.40 for 10,000-unit quantities, the InnoSwitch5-Pro devices from Power Integrations represent a paradigm shift in power conversion technology. Designers and manufacturers now have access to a versatile and efficient solution that not only meets but exceeds the demands of high-density USB PD adapters and various other applications. For more information, reach out to a Power Integrations sales representative or visit power.com.
