Power Integrations Introduces New HiperPFS-4 Power Factor Correction IC, Delivering 98% Full Load Efficiency

     Power Integrations introduces the HiperPFS-4 Power Factor Correction (PFC) controller IC with Qspeed's low reverse recovery charge (Qrr) boost diode. This combination can provide over 98% full load efficiency for 75W to 400W PCs, TVs and similar applications.

     Edward Ong, Product Marketing Manager at Power Integrations, said: “Designs using the HiperPFS-4 ICs exhibit extremely high efficiency over the entire load range, with no-load power consumption of only 36mW at 230VAC. The HiperPFS-4 product family is not only ideal for PCs and TV applications, but also for battery chargers, power tools, industrial power supplies and LED lighting. The active devices integrated in the HiperPFS-4 IC are rated at 600V, making it easy to meet the commonly used 80% derating specification. "

     The HiperPFS-4 IC integrates a continuous conduction mode (CCM) PFC control circuit, a boost diode and a 600V MOSFET in one device. By adding a boost diode, heat sink installation is reduced, resulting in a simpler design and better temperature rise performance. Also, integrating the Qspeed diode inside the IC minimizes the parasitic inductance on the traces, which in turn provides higher reliability in the event of surges in the AC input, voltage spikes that the power switch presents across it during transients A maximum of 50V can be reduced. Therefore, the integrated 600V MOSFET can easily meet the 80% derating requirement when powered by a constant voltage bus of 385VDC.

      HiperPFS-4 IC can achieve power factor greater than 0.95 at more than 20% load. Optimized for continuous conduction mode PFC operation, Qspeed boost diodes have very low reverse recovery losses, and their performance is close to that of SiC devices without the added cost.