New LLC switcher IC delivers 1650W of continuous output power

Power Integrations reported a two-fold increase in power output from the HiperLCS-2 chipset. Featuring advanced half-bridge switch technology and an innovative package, the new device can deliver up to 1650W of continuous output power with over 98% efficiency. The new family member targets industrial power supplies and chargers for e-scooters and outdoor power tools, where its high efficiency and high level of integration lower enclosure volume and eradicate the necessity for air vents and fans, improving reliability and resistance to dust and moisture.

The highly integrated family lowers the component count and board area of half-bridge LLC resonant power converters by 30% to 60% in applications of 50W and higher. The new IC increases continuous power to more than 1.6kW and permits brief peak loads of 2.5kW by employing a new, thermally efficient POWeDIP package. This package includes an electrically insulating, thermally conductive ceramic pad easily attached to any flat, heat-sinking surface. It supplies sufficient creepage to the package pins, enabling an overall thermal performance of less than one degree Celsius per watt.

Zeeshan Kabeer, product marketing manager at Power Integrations, said: “High power and high efficiency are non-negotiable requirements for fully sealed chargers and adapters. For those who rely on power tools or personal transportation for their livelihood, charger failure due to dust, moisture, insects, or damage to electromechanical components is unacceptable. Our new, high-efficiency, 1650W HiperLCS-2 device allows the manufacture of completely sealed chargers for these mission-critical applications.”

The primary-side HiperLCS2-HB devices in the chipset include 600V FREDFETs in a half-bridge configuration. Self-bias and start-up control enable operation without an external bias supply, reducing system cost and complexity. The companion IC in the chipset, the HiperLCS2-SR, incorporates a secondary-side master controller that provides optimised includes rectification (SR) to lower output rectification losses. It also consists of a FluxLink isolator for robust, high-speed feedback to the primary-side IC, eradicating the necessity for a slow and unreliable optocoupler. This IC controls multi-mode burst operation, ensuring excellent light- and no-load performance while stopping audible noise and decreasing output ripple. To ensure high reliability, the IC also provides comprehensive fault protection.