Power Integrations launched its HiperPFSTM-3 family of power factor correction (PFC) ICs, touting high power factor (PF) and high efficiency across the entire load range. The PFC ICs target applications with continuous power demands up to 405 W for universal input and 900 W for high-line. The new series features efficiency levels of better than 95 percent from 10 percent 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 percent load,” said the company.
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 use a technique that controls EMI without adversely affecting power factor at light loads. This innovation is designed to deal with the issue of poor system power factor at light load caused by X capacitors that are used to reduce differential mode EMI being fed back to the AC line, according to PI.
Power Integrations explains: “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, minimizing the phase angle difference between the input voltage and the current.”
This means “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.”
The upshot: designers can eliminate the standby power supply – reducing bill of materials and cost – that is required to meet standby energy-use standards such as ErP Lot 6.
The HiperPFS-3 ICs are housed in thermally efficient eSIP-16 packaging that simplifies heat sink mounting.
Availability: N/A
Pricing: $1.27 in quantities of 10,000.
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