ADI ADP1047数字PFC控制方案

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 repo...