Power factor correction ICs enable highly efficient PFC designs

Power Integrations has announced its HiperPFSTM-4 family of PFC ICs. The new device family serves applications targeting excellent efficiency and power factor performance at both full load and light load conditions. HiperPFS-4 devices incorporate a 600V MOSFET suitable for 305VAC input and a high efficiency, variable frequency, CCM PFC controller in a single, compact, electrically isolated, heatsinkable package. The IC family delivers high power factor, low THD and uniformly high efficiency across a wide output load range, allowing OEMs to meet the demanding 80 PLUS Platinum and Titanium power supply standards. The ICs achieve a high power factor of above 0.95 and low THD even at 20% of rated load. The devices also meet the stringent surge requirements of major computer and entertainment equipment providers, such as the 1 second 410VAC input test, which ensures field reliability and robustness against voltage swells and surges. The new ICs suit enclosed designs up to 300W, open frame power supplies of up to 400W and highline applications up to 550W. Protection features include UVLO, UV, OV, OTP, brown-in/out, cycle-by-cycle current limit and power limit. The ICs consume less than 60mW at 230VAC while regulating output at no-load and less than 20mW in sleep mode. Comments Edward Ong, product marketing manager at Power Integrations: “The HiperPFS-4 product family offers very high efficiency and power factor plus low THD across a wide load range. The benefits afforded by the unique frequency-sliding control technology enable HiperPFS-4 designs to deliver very high efficiency down to very light load – important when targeting EU CoC requirements that include a 10% load efficiency measurement. The 600 V integrated power MOSFET and sophisticated protection features make the IC family ideal for use in regions where input voltage fluctuations can be severe. HiperPFS-4 devices provide safe PFC operation with a good margin at 305 VAC input for data centers and commercial LED lighting. Other applications include refrigerators (which increasingly contain high PFC specification requirements), cordless tool chargers and eBike battery chargers.”