Power Integrations, working in high-voltage integrated circuits for energy-efficient power conversion, today announced its HiperPFS-3 family of power factor correction ICs, which offer high power factor and high efficiency across the entire load range. Targeting applications with continuous power demands up to 405 W for universal input and 900 W for high-line, the ICs feature efficiency levels of better than 95% from 10% load to full load and consume less than 60 mW under no-load conditions. A power factor of above 0.92 is easily achievable at 20% load.
The highly integrated HiperPFS-3 devices include the variable frequency CCM controller, high-voltage power MOSFET and a Qspeed low QRR boost diode. The new devices also employ a means of controlling EMI without adversely affecting power factor at light loads. Poor system power factor at light load is caused by X capacitors that are used to reduce differential mode EMI being fed back to the AC line. HiperPFS-3 ICs incorporate a digital power factor-enhancing circuit that activates during light load conditions; this increases the compensation to overcome the reactance of X capacitors in the EMI filter, minimising the phase angle difference between the input voltage and the current. Consequently, designers may increase the size of the X capacitors while minimizing or eliminating differential-mode chokes, thereby reducing EMI without degrading light load power factor performance. This results in a smaller, lower cost, EMI filter stage.
Commented Edward Ong, product marketing manager at Power Integrations: “Standby energy-use standards such as ErP Lot 6 have previously forced designers of PCs and other systems to include both a main PSU and standby power supply. The excellent light load efficiency of our new HiperPFS-3 ICs enables them to eliminate the standby power supply, saving components, design time, space and cost.”
Available for both high and low-line applications, HiperPFS-3 ICs cover a continuous output power up to 900 W. Thermally efficient eSIP-16 packaging simplifies heat sink mounting. Devices cost $1.27 in 10,000 piece quantities.
