Power Integrations, a developer of high-voltage integrated circuits (Cs) for energy-efficient power conversion, has announced that its 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 PFC control circuitry, the boost diode and a 600 V metal-oxide semiconductor field-effect transistor (MOSFET) in one device. Including the boost diode reduces heatsink mounting, leading to a simpler design and better thermal performance. Furthermore, 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 easily able to meet the 80% de-rating requirement when delivering a 385 V DC constant-voltage bus.
HiperPFS-4 ICs achieve a power factor of greater than 0.95 at above 20% load. The Qspeed boost diode is optimized for continuous conduction mode PFC operation featuring very low reverse recovery losses that approach the performance of silicon carbide devices without the financial penalty.