The applications are laptops, high-end mobile phones and other portable consumer products, including designs that require the new USB PD EPR (Extended Power Range) protocol.
Adnaan Lokhandwala, senior director of product marketing at Power Integrations, stated: “The combination of ZVS and GaN is magic for power supplies. Switching losses disappear, and we can take advantage of GaN’s low conduction losses to implement super-dense adapter designs with far fewer components than AHB (Asymmetric Half-Bridge) or active clamp alternatives. For example, we’ve used 140W/28V USB PD adapters in a 4.2 cubic inch footprint using only 106 components. The flyback topology used by the InnoSwitch5-Pro ICs is much easier to implement than AHB and can also operate on universal mains with or without a PFC stage.”
The InnoSwitch5-Pro flyback switching ICs incorporate lossless input line voltage sensing on the secondary side for DCM/CCM and ZVS adaptive control to maximize efficiency and simplify design across the entire line and load. The ICs also incorporate post-production tolerance compensation to facilitate precise control of the output constant (DC) current, better than two percent, to support the UFCS protocol. Their excellent efficiency, exceeding 95%, allows designers to eliminate heatsinks, spreaders, and packaging materials for thermal management, further reducing component size, weight, cost, and manufacturing complexity.
The main markets for the InnoSwitch5-Pro family of flyback switching integrated circuits include high-density USB PD 3.1 Extended Power Range (EPR), UFCS and multi-protocol adapters, laptop adapters, and aftermarket single- or multi-port chargers and adapters.
Availability and Resources:
Pricing for InnoSwitch5-Pro devices starts at $2.40 for quantities of 10,000 units. For more information, contact a Power Integrations sales representative or visit power.com
