Integrated PFC IC for compact consumer products

May 22, 2013 // By Graham Prophet
Power Integrations' HiperPFS-2 is a family of high-efficiency, active-PFC (power-factor correction) ICs for offline applications from 100 to 380W. HiperPFS-2 ICs combine a boost PFC controller, driver, PFC MOSFET, PFC diode and protection circuits in one package, enabling compact designs for small-form-factor power supplies as used in mini-tower PCs, all-in-one PCs, game console adapters and TVs.

The HiperPFS-2 controller uses a variable-frequency CCM algorithm providing up to 97% efficiency across the load range from 20% to 100% and power factor greater than 0.9 at 20% load with 265 VAC input for designs over 200 W. Including line-connected sense elements, the new device contributes 60 mW to a typical high-power adapter’s 300 mW no-load budget. Conducted and radiated EMI are minimised due to the integrated soft-recovery diode and short parasitic inductance loop which results from the highly integrated, compact design.

Power Integrations claims the HiperPFS-2 to be the most highly integrated PFC solution available, that enables designers to cost-effectively meet the 80 PLUS Gold and Platinum efficiency standards in space-constrained PCs. The device’s no-load performance simplifies design and reduces cost in high-power adapter applications targeting aggressive standby or no-load specifications.

Key applications for HiperPFS-2 ICs include telecoms and industrial products such as blowers, motor drives and chargers. A new reference design based on the HiperPFS-2 IC, RDR-294, describes a 350-W output power boost CCM PFC board with wide range AC input. RDR-294 is able to attain over 97% efficiency for 230 VAC across a wide load range and over 0.9 PF at 20% load; see http://www.powerint.com/sites/default/files/PDFFiles/rdr294.pdf


HiperPFS-2 devices come in Power Integrations’ eSIP-16 package with an isolated metal heatsink pad for simple and easy clip-mounting, and cost from $0.959 (10,000).

Power Integrations, www.powerint.com