Date: 22/11/2011

Interleaved digital PFC controller with accurate AC power metering

Analog Devices, Inc. (ADI), has introduced the ADP1048, the interleaved digital power factor correction (PFC) controller with highly accurate AC power metering capability. Similar to the ADP1047 single-phase digital PFC controller (announced March, 2011), the interleaved (or dual-phase) ADP1048 uses conventional, continuous-conduction-mode PFC techniques to reduce harmonic distortion. These techniques convert all signals to the digital domain and allow parameters to be adjusted and reported over a PMBus-compliant interface, including accurate measurement of input voltage, current and power.

Designed specifically for high reliability AC/DC power-factor correction systems and motor control applications, the ADP1048 is suited to communications infrastructure, industrial and instrumentation systems, such as motor control, and high-power medical imaging applications.

The ADP1048 provides power metering accuracy of ±3 percent at full load current with further improvements to ±1 percent with customer calibration. The new digital controller also offers enhanced transient response through non-linear control algorithms; programmable inrush control to reduce start-up over-stress, real-time programming to maximize efficiency and extensive fault detection and reporting for improved reliability, says ADI. The ADP1048 can be frequency synchronized to eliminate "beat" frequency noise, or alternatively, the switching frequency spread spectrum feature can be enabled to further improve EMI.

Key features and benefits of ADP1048 as per ADI include:
Interleaved capability enables reduction in inductor and solution size and is suited to high-power-level PFC
Flexible, digital-control-loop PFC enables optimized harmonic correction
True RMS AC metering capability provides high accuracy power measurement
GUI programmability promotes ease of use and reduces time to market
PMBus compliance allows a standardized system software interface

Availability, Pricing and Complementary ComponentsProduct Full Production Temperature Range Price Each Per 1,000 Packaging
ADP1048 Now -40°C to +85°C $3.60 24-lead QSOP
ADP1048-600-EVALZ Now -- $600.00 --