LLC switcher delivers 1650 W of continuous power
Power Integrations has doubled the power output of its HiperLCS chipset to provide up to 1650W of continuous power for power tools.
The HiperLCS-2 chipset uses a half-bridge switch and enhanced package with over 98 percent efficiency for LLC resonant power converters. The new family member targets industrial power supplies as well as chargers for e-scooters and outdoor power tools, where its high efficiency and high level of integration reduce enclosure volume and eliminate the need for air vents and fans, enhancing reliability and resistance to dust and moisture.
The primary-side HiperLCS2-HB devices in the chipset incorporate 600 V FREDFETs in a half-bridge configuration. Self-bias and start-up control enable operation without an external bias supply, reducing system cost and complexity.
A companion chip, the HiperLCS2-SR, incorporates a secondary-side master controller that provides optimized synchronous rectification (SR) to reduce output rectification losses. It also includes a FluxLink isolator for feedback to the primary-side IC, eliminating the need for an optocoupler. This controls multi-mode burst operation, ensuring light- and no-load performance while eliminating audible noise and reducing output ripple and also provides comprehensive fault protection.
Overall, the chipset reduces component count and board area of half-bridge LLC resonant power converters by 30 to 60 percent in applications of 50 W and higher.
The peak power of 2.5 kW for the LLC switcher comes from a new, thermally efficient POWeDIP package based on a an electrically insulating, thermally conductive ceramic pad that can be easily attached to any flat, heat-sinking surface. This provides sufficient creepage to the package pins, enabling an overall thermal performance of less than 1 degree Celsius per watt.
“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 1650 W HiperLCS-2 device allows the manufacture of completely sealed chargers for these mission-critical applications,” said Zeeshan Kabeer, product marketing manager at Power Integrations.
Reference designs for a 1650 W DC-DC LLC switcher half-bridge resonant converter (DER-1060), a 720 W DC-DC LLC half-bridge resonant converter (DER-978), and a 720 W PFC LLC PSU with constant voltage and constant current mode control (DER-984) are available for download.
Pricing for HiperLCS-2 POWeDIP ICs starts at $5.39 for 10,000-unit quantities.
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