Power Integrations offers PFC controller IC with Qrr boost diode

By integrating a Qspeed low reverse recovery charge (Qrr) boost diode, Power Integrations’ HiperPFS-4 power factor correction (PFC) IC delivers greater than 98 per cent full load efficiency in PCs and TVs and other applications, such as battery chargers, power tools, industrial power supplies and LED lighting, operating between 75 and 400W.

The HiperPFS-4 IC combines continuous conduction mode (CCM) PFC control circuitry, the boost diode and a 600V MOSFET in one device. Including the boost diode reduces heatsink mounting, as well as simplifies design and improves thermal performance. The built-in Qspeed diode also provides greater robustness against AC line surges because it minimises parasitic trace inductances, which in turn reduces voltage spikes seen by the power switch during transients by up to 50V. The integrated 600V MOSFET is therefore easily able to meet the 80 per cent de-rating requirement when delivering a 385V DC constant voltage bus, reports Power Integrations.

HiperPFS-4 ICs achieve a power factor of greater than 0.95 at above 20 per cent load. The Qspeed boost diode is optimised for continuous conduction mode PFC operation featuring very low reverse recovery losses that approach the performance of silicon carbide devices without the financial penalty, says the company.

Comments Power Integrations’ product marketing manager Edward Ong: “Designs using HiperPFS-4 ICs show very high efficiency across the load range with as little as 36mW of no-load power consumption at 230V AC.

“The active devices incorporated into HiperPFS-4 ICs are rated to 600 V, which eases compliance with frequently requested 80 per cent de-rating specifications,” he added.

The HiperPFS-4 PFC controller IC with a QSpeed low Qrr boost diode is available now in volume product quantities from Power Integrations or one of the company’s authorised worldwide distributors i.e. Digikey, Farnell, Mouser, and RS Components.


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