Quasi-resonant PFC ICs integrate 750-V GaN switch

Power Integrations has launched the HiperPFS-5 family of power-factor-correction (PFC) ICs with an integrated 750-V PowiGaN gallium-nitride (GaN) switch at APEC 2022. The quasi-resonant PFC ICs deliver an efficiency of up to 98.3 percent and up to 240 W without a heat sink.

The PFC ICs also can achieve a power factor (PF) of better than 0.98. At light load, the HiperPFS-5 ICs are said to maintain a high PF of 0.96 even at 20 percent load. No-load power consumption is 38 mW.

Suited for high-power USB PD adapters, TVs, game consoles, all-in-one computers, and appliances, the HiperPFS-5 PFC ICs with PowiGaN technology and a QR control scheme deliver a new solution for handling  losses in the power line caused by capacitors and inductors used in power supplies that generate a phase change between the current and voltage.

The HiperPFS-5’s QR discontinuous conduction mode (DCM) control technique adjusts the switching frequency across output load, input line voltage, and input line cycle. Power Integrations said QR DCM control ensures low switching losses and allows the use of a low-cost boost diode. The low switching and conduction loss, together with lossless current sensing, is said to enable high efficiency across the entire load range.

In addition, the variable frequency engine allows the reduction of the boost inductor size by more than 50 percent compared to conventional critical-conduction-mode (CRM) boost PFC circuits, said PI.

HiperPFS-5 ICs maintain a high PF up to 305 VAC and can operate continuously at up to 460 VAC during line swells, said the company. They also  incorporate the company’s automatic X-capacitor discharge (CAPZero) function, including the required redundant pins to meet safety regulations, and high-voltage self-start-up.

By pairing the  HiperPFS-5 ICs with PI’s new HiperLCS-2 chipset or  InnoSwitch4-CZ active-clamp flyback ICs, “designers can easily beat even the most aggressive efficiency regulations while cutting the bill of materials by half and achieving extremely attractive form factors for ultra-fast chargers,” said Edward Ong, senior product marketing manager, Power Integrations, in a statement.

The HiperPFS-5 quasi-resonant PFC controller ICs, housed in a SOP-T28F SMD power package,  are priced at $2.34 in quantities of 10,000-unit quantities. The reference design DER-672 is available to download for evaluating the HiperPFS-5. Power Integrations is exhibiting at APEC 2022 in booth #324.