GENERAL DESCRIPTION

The ADP1047/ADP1048 are 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.

FEATURES

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

External frequency synchronization

PMBus compliant

Programmable ac line fault detection and protection

Programmable output fault detection and protection

Extensive fault protection for high reliability systems

Frequency range from 30 kHz to 400 kHz

8 kB EEPROM

Programming via easy-to-use graphical user interface (GUI)

APPLICATIONS

AC/DC power supplies for applications

Computing server and storage

Network and communication infrastructure

Industrial and medical