Power Integrations HiperLCS-2

Reasons to buy

• Scalable solution 
  • 1650 W continuous and 2450 W peak output with the new POWeDIP package
  • 220 W output without heatsink using an InSOP package
• High efficiency across line and load – up to 98.1% efficient
• 60% fewer components and smaller board area than conventional discrete LLC
• Lower than 65 mW no-load consumption, including line sense
• Excellent 0% to 100% transient response

Product Description

Resonant converters are typically used where an application demands the highest possible efficiency. However, resonant converters using separate controllers and discrete MOSFETs require a high component count, making them bulky and notoriously difficult to manufacture due to their complexity. The HiperLCS-2 chipset avoids the challenges normally associated with LLC designs, permitting designers to quickly and consistently create power supplies with high efficiency, wide operating range and low component count.

The primary-side HiperLCS2-HB device in the chipset incorporates 600 V FREDFETs in a half-bridge configuration. Self-bias and start-up control enable operation without an external bias supply. The new POWeDIP package includes an electrically isolating, thermally conductive ceramic pad that can be easily attached to any flat heat-sinking surface and provides a thermal impedance of less than 1°C per watt. The POWeDIP package provides extended creepage between the thermal pad and the IC pins to meet safety requirements.

The companion IC in the chipset, 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 robust, high-speed communication to the primary-side IC, eliminating the need for an unreliable optocoupler.

Power supply designs based on the HiperLCS-2 devices can achieve no-load input power of less than 65 mW at 400 VDC input and provide a continuously regulated output, easily complying with the world's most stringent no-load and standby efficiency regulations. All HiperLCS-2 family members feature self-powered start-up while also driving a PFC stage centered around the company’s HiperPFS ICs. Secondary-side sensing provides better than 1% regulation accuracy across line, load, temperature and across production variation.

Design example reports 

DER-1060 – 1650 W DC-DC LLC Resonant Half-Bridge Converter with SR

• 400 VDC input; 60 V, 27.5 A output
• Integrated LLC and SR-drive stages reduce component count
• Precise control of both SR and HB to optimize efficiency
• Higher than 98% efficiency at 50% load
• Lower than 180 mW no-load consumption

DER-978 – 720 W DC-DC LLC Resonant Half-Bridge Converter with SR

• 400 VDC input; 48 VDC Output
• Integrated LLC and SR-drive stages reduce component count
• Precise control of both SR and HB to optimize efficiency
• Higher than 98% efficiency at 50% load
• Lower than 71 mW no-load consumption

DER-984 – 720 W LLC Power Supply with CV and CC Mode Control

• 180 VAC to 280 VAC input; 60 V, 12 A output
• Precise control of both SR and HB to optimize efficiency
• HiperPFS-3 PFC IC for higher than 0.99 power factor at full load
• Higher than 94% full-load system efficiency at 230 VAC input
• Wide output battery voltage range: 26 VDC to 60 VDC

DER-672 – 220 W LLC Power Supply for TV

• 90 VAC to 265 VAC input; 24 V, 9.2 A output
• Precise control of both SR and HB to optimize efficiency
• HiperPFS-5 PFC IC for higher than 0.99 power factor at full load
• Higher than 96% PFC efficiency and 97% LLC efficiency at full load
• Quasi-resonant DCM control ensures low switching losses
• Eliminates heatsinks for powers up to 220 W