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HiperPFS-4 power factor correction IC delivers 98% full-load efficiency

Power Integrations has announced that the HiperPFS-4 power factor correction (PFC) controller IC is now available with an integrated Qspeed low reverse recovery charge (Qrr) boost diode.

This combination delivers greater than 98% full-load efficiency in PC, TV, and similar applications between 75 W and 400 W.

The HiperPFS-4 IC combines continuous conduction mode (CCM) PFC control circuitry, the boost diode and a 600 V MOSFET in one device. By including the boost diode Power Integrations has reduced the heatsink mounting, leading to a simpler design and better thermal performance.

The built-in Qspeed diode also provides greater robustness against AC line surges since parasitic trace inductances are minimized, which in turn reduces voltage spikes seen by the power switch during transients by up to 50 V. The integrated 600 V MOSFET is therefore able to meet the 80% de-rating requirement when delivering a 385 VDC constant-voltage bus.

HiperPFS-4 ICs are able to achieve a power factor of greater than 0.95 at above 20% 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.

Author
Neil Tyler

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