ADI ADP1047 300W电源评估解决方案~*

2011年11月16日 13:31 发布者：1770309616

ADI公司的ADP1047/ADP1048是具有精确AC电源计量的数字功率系数修正(PFC)控制器:ADP1047用于单相PFC应用;而ADP1048用插入式和无桥式PFC应用,使用户具有最佳的系统性能,最大化的效率,降低产品上市时间.主要应用在各种应用的AC/DC电源,服务器和存储设备,网络和通信基础设备,工业和医疗设备.本文介绍了ADP1047/ADP1048 主要特性,方框图,典型应用电路以及ADP1047 300瓦评估套件主要特性,主板和子板电路图,材料清单与PCB布局图.

ADP1047: Digital Power Factor Correction Controller with accurate AC Power Metering

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.

ADP1047/ADP1048 主要特性:

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)

ADP1047/ADP1048 应用:

AC/DC power supplies for applications

Computing server and storage

Network and communication infrastructure

Industrial and medical

图1.ADP1047 功能方框图

图2.ADP1048 功能方框图

图3.ADP1047 典型应用电路图

图4.ADP1048 典型应用电路图

图5.ADP1048 无桥PFC典型应用电路图

ADP1047 300瓦评估套件

This evaluation board features the ADP1047 in a switching power supply application. With the evaluation board and software, the ADP1047 can be interfaced to any PC running Windows 2000/XP/Vista/NT via the computer’s USB port. The software allows control and monitoring of the ADP1047 internal registers. The board is set up for the ADP1047 to act as boost power factor correction circuit with a rated load of 300W from an input voltage ranging from a 85 VRMS to 265 VRMS.

This evaluation board features the ADP1047 in a typical AC/DC switching power supply in a boost power factor correction (PFC) topology. The circuit is designed to provide a rated load of 385V/300W from an AC input voltage source of 85 VRMS to 265 VRMS AC. The ADP1047 provides functions all the functions necessary for active PFC circuit plus accurate AC power metering. It achieves near-unity power factor, low distortion of the input current, the output voltage regulation, over current protection, AC line fault detection and protection, over temperature protection, and power supply shutdown. It also can optimize light load efficiency performance using output voltage adjustment and frequency reduction.

Please refer to the appendix for the detailed schematic. The AC input side consists of the input terminals, EMI filter, inrush relay and its control circuit. The D1 is the rectifier bridge for main power transmission. The D4 is used for input voltage sensing. The boost circuit consists boost inductor (L2), boost switch (Q1) and diode (D2). The gate signal for the boost switch comes from the ADP1047 through the ADP3634 gate driver. The ADP1047 (U1, on daughter card) can be powered either via the USB 5V via an ADP3303 LDO (U2, on daughter card) present on the same daughter card, or via the auxiliary power supply on the board. Thermistor (RTD1) is placed close to the MOSFET on the board allowing over temperature protection functionality to be implemented.

ADP1047 300瓦评估套件主要特性:

Boost PFC topology providing high power factor and low THD

Protection features for AC line input and high voltage output

High efficiency

I2C serial interface to PC

Software GUI

Programmable digital filters

Programmable response to faults

Programmable inrush control

Accurate AC power metering

Digital Calibration and trimming