摘要：  ADI 公司的ADP1047是业界首个具有能量测量的数字功率因素修正(PFC)控制器。

关键字：  测量，  控制器，  数字功率

 ADI 公司的ADP1047是业界首个具有能量测量的数字功率因素修正(PFC)控制器。

 The ADP1047 is a digital power factor correction controller providing accurate input power metering capability and inrush control targeting ac/dc systems.

 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. This allows users to optimize system per-formance， maximize efficiency across the load range， and reduce design time to market.

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

 The combination of a flexible， digitally controlled PFC engine and accurate input power metering facilitate the adoption of intelligent power management systems capable of making decisions to improve end user system efficiency. The device targets further efficiency improvements through programmable frequency reduction at light load and the capability to reduce the output voltage at low loads.

 The ADP1047 provides enhanced integrated features and functions; the Inrush and soft start control functions provide significant component count reduction with easy design optimization.

 The device targets high reliability， redundant power supply applications and has extensive and robust protection circuitry: independent overvoltage protection， overcurrent (ILIM)， ground continuity metering， and ac sensing. Internal overtemperature is provided and external temperature can be recorded via an external sensing device.

 The internal 8 kB EEPROM stores all the programmed values and allows standalone control without a microcontroller. All parametric reporting and adjustments are programmed via an easy-to-use GUI—no complex programming is required.

 The ADP1047 operates from a single 3.3 V supply. The device is available in a 24-lead QSOP package specified over ambient temperature range 40℃ to +85℃.

 ADP1047主要特性:

Flexible， single phase， digital power factor correction (PFC) controller

True rms ac power metering

Enhanced dynamic response

Optimized light load efficiency performance

Output voltage adjustment

Frequency reduction

Inrush 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)

ADP1047应用:

AC/DC power supplies for applications including

Computing server and storage

Network and communication infrastructure

Industrial and medical

图1.ADP1047方框图

图2.ADP1047典型应用电路图