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Digital power factor correction controller with AC power metering capability

Analog Devices has introduced the ADP1048, interleaved digital PFC (power factor correction) controller with AC power metering capability. Similar to the ADP1047 single-phase digital PFC controller, the interleaved or dual-phase ADP1048 uses conventional, continuous-conduction-mode PFC techniques to reduce harmonic distortion, claims the company. The single-phase PFC controller can be configured as an interleaved design to reduce inductor size and replace the AC/DC rectifier to optimise efficiency in bridgeless boost mode. As with the single-phase controller, the interleaved dual-phase PFC controller is easily programmed using a graphical-user interface to design and optimise the systems without the complex code programming required by alternative DSP-based devices. The dual-phase controller is suitable for communications infrastructure, industrial and instrumentation systems, such as motor control, and high-power medical imaging applications. It also offers enhanced transient response though non-linear control algorithms, programmable inrush control to reduce start-up over-stress, real-time programming to maximise efficiency and extensive fault detection. The dual-phase controller can be frequency synchronised to eliminate beat frequency noise, or alternatively, the switching frequency spread spectrum feature can be enabled to enhance EMI, according to the company. The dual-phase controller enables optimised harmonic correction and is PMBus-compliant. It operates from -40 to +85°C and is available in a 24-lead quarter small-outline package. The single- and dual-phase digital PFC controllers are designed to complement the company’s ADP1043A digital controller for isolated systems, high-speed MOSFET drivers and iCoupler digital isolators.