Power Factor Correction ICs Achieve Over 95 Percent Efficiency

05 April 2017

HiperPFS™-4 power factor correction IC. Source: Power Integrations.  HiperPFS™-4 power factor correction IC. Source: Power Integrations. Power Integrations’ HiperPFS™-4 family of power factor correction (PFC) ICs incorporate a 600 V MOSFET suitable for 305 VAC input and a variable frequency PFC controller in a compact, isolated package.
HiperPFS™-4 devices incorporate a continuous conduction mode (CCM) boost PFC controller, gate driver and 600 V power MOSFET in a single low-profile (GROUND pin connected) power package. HiperPFS-4 devices eliminate the need for external current sense resistors, also eliminating their associated power loss, and instead use an innovative control technique that adjusts the switching frequency over output load, input line voltage and input line cycle.

This control technique maximizes efficiency over the entire load range, particularly at light loads. Additionally, it minimizes the EMI filtering requirements due to its wide bandwidth spread spectrum effect. HiperPFS-4 uses advanced digital techniques for line monitoring, line feed-forward scaling and power factor enhancement; while using analog techniques for the core controller in order to maintain extremely low no-load power consumption.

HiperPFS-4 also features an integrated non-linear error amplifier for enhanced load transient response, a user programmable Power Good (PG) signal as well as user selectable power limit functionality. The devices work with greater than 95 percent efficiency from 10 percent load to 100 percent load and consumes under 60 mW no-load at 230 VAC. They provide up to 450 W peak output power for universal applications, 610 W for high-line only applications.

The devices are protected against undervoltage, overvoltage, brown-in/out, and hysteretic thermal shutdown. HiperPFS-4 also provides cycle-by-cycle current limit and Safe Operating Area (SOA) protection of the power MOSFET, output power limiting for overload protection, and pin-to-pin short-circuit protection. The devices are EN61000-3-2 Class C and D compliant.

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