Data de postagem: 2015-09-23
Power Integrations has introduced the HiperPFS-3 series of power factor correction ICs, which provide high power factor and high efficiency over the entire load range.
These ICs are designed to meet the requirements of universal input continuous power requirements up to 405W and high line power continuous power requirements up to 900W. Under 10% load to full load conditions, their efficiency levels are higher than 95%. Power consumption under no-load conditions Below 60mW. It is easy to obtain a power factor higher than 0.92 at a 20% load.
The highly integrated HiperPFS-3 device includes a variable frequency CCM controller, a high voltage power MOSFET, and a Qspeed (tm) low QRR boost diode. The new device also uses innovative EMI control methods without adversely affecting the power factor at light loads. The poor power factor of the system at light load is caused by X capacitors, which are used to reduce the differential mode EMI feedback to the AC line. The HiperPFS-3 IC includes a digital power factor enhancement circuit that can be started under light load conditions; this can add compensation to overcome the reactance of the X capacitor in the EMI filter, thereby minimizing the input voltage and current Phase angle difference. As a result, designers may increase the size of X capacitors while minimizing or eliminating differential mode chokes, thereby reducing EMI without degrading light-load power factor performance. This results in smaller, lower cost EMI filter stages.
Edward Ong, Product Marketing Manager, Power Integrations, said: "Standby energy standards such as ErP Lot 6 previously forced designers of PCs and other systems to include both primary PSUs and backup power. Our new HiperPFS-3 IC has excellent light-load efficiency This eliminates the need for a backup power supply, which saves components, design time, space and cost. "
HiperPFS-3 ICs can be used in high- and low-line applications, covering continuous output power up to 900W. The energy-efficient eSIP-16 package simplifies the installation of the heat sink.
