Digital Power Factor Correction Controller with accurate AC Power Metering

The ADP1047 / ADP1048are digital power factor correction (PFC) controllers that provide accurate input power metering capability and inrush current control for ac/dc systems. The ADP1047 is designed for single phase PFC applications; the ADP1048 is designed especially for interleaved and bridgeless PFC applications.

The digital PFC function is based on a conventional boost PFC with multiplication of the output voltage feedback combined with the input current and voltage to provide optimum harmonic correction and power factor for ac/dc systems. All signals are converted into the digital domain to provide maximum flexibility; all key parameters can be reported and adjusted via the PMBus™ interface. The ADP1047 / ADP1048 allow users to optimize system performance, maximize efficiency across the load range, and reduce design time to market.

The ADP1047 / ADP1048 provide accurate rms measurement of input voltage, current, and power. This information can be reported to the microcontroller of the power supply via the PMBus interface.

APPLICATIONS

* AC/DC power supplies for applications:

Computing Server & Storage

Network and communication infrastructure

Industrial and Medical

* Flexible digital power factor correction (PFC) controller

* Single phase operation (ADP1047); interleaved and bridgeless operation (ADP1048)

* True rms ac power metering

* Enhanced dynamic response:

* Optimized light load efficiency performance

Output voltage adjustment

Frequency reduction

* Inrush current control

* Switching frequency spread spectrum for improved EMI